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• What Is Critical Thinking? | Definition & Examples

What Is Critical Thinking? | Definition & Examples

Published on May 30, 2022 by Eoghan Ryan . Revised on May 31, 2023.

Critical thinking is the ability to effectively analyze information and form a judgment .

To think critically, you must be aware of your own biases and assumptions when encountering information, and apply consistent standards when evaluating sources .

Critical thinking skills help you to:

• Identify credible sources
• Evaluate and respond to arguments
• Assess alternative viewpoints
• Test hypotheses against relevant criteria

Table of contents

Why is critical thinking important, critical thinking examples, how to think critically, other interesting articles, frequently asked questions about critical thinking.

Critical thinking is important for making judgments about sources of information and forming your own arguments. It emphasizes a rational, objective, and self-aware approach that can help you to identify credible sources and strengthen your conclusions.

Critical thinking is important in all disciplines and throughout all stages of the research process . The types of evidence used in the sciences and in the humanities may differ, but critical thinking skills are relevant to both.

In academic writing , critical thinking can help you to determine whether a source:

• Is free from research bias
• Provides evidence to support its research findings
• Considers alternative viewpoints

Outside of academia, critical thinking goes hand in hand with information literacy to help you form opinions rationally and engage independently and critically with popular media.

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Critical thinking can help you to identify reliable sources of information that you can cite in your research paper . It can also guide your own research methods and inform your own arguments.

Outside of academia, critical thinking can help you to be aware of both your own and others’ biases and assumptions.

Academic examples

However, when you compare the findings of the study with other current research, you determine that the results seem improbable. You analyze the paper again, consulting the sources it cites.

You notice that the research was funded by the pharmaceutical company that created the treatment. Because of this, you view its results skeptically and determine that more independent research is necessary to confirm or refute them. Example: Poor critical thinking in an academic context You’re researching a paper on the impact wireless technology has had on developing countries that previously did not have large-scale communications infrastructure. You read an article that seems to confirm your hypothesis: the impact is mainly positive. Rather than evaluating the research methodology, you accept the findings uncritically.

Nonacademic examples

However, you decide to compare this review article with consumer reviews on a different site. You find that these reviews are not as positive. Some customers have had problems installing the alarm, and some have noted that it activates for no apparent reason.

You revisit the original review article. You notice that the words “sponsored content” appear in small print under the article title. Based on this, you conclude that the review is advertising and is therefore not an unbiased source. Example: Poor critical thinking in a nonacademic context You support a candidate in an upcoming election. You visit an online news site affiliated with their political party and read an article that criticizes their opponent. The article claims that the opponent is inexperienced in politics. You accept this without evidence, because it fits your preconceptions about the opponent.

There is no single way to think critically. How you engage with information will depend on the type of source you’re using and the information you need.

However, you can engage with sources in a systematic and critical way by asking certain questions when you encounter information. Like the CRAAP test , these questions focus on the currency , relevance , authority , accuracy , and purpose of a source of information.

When encountering information, ask:

• Who is the author? Are they an expert in their field?
• What do they say? Is their argument clear? Can you summarize it?
• When did they say this? Is the source current?
• Where is the information published? Is it an academic article? Is it peer-reviewed ?
• Why did the author publish it? What is their motivation?
• How do they make their argument? Is it backed up by evidence? Does it rely on opinion, speculation, or appeals to emotion ? Do they address alternative arguments?

Critical thinking also involves being aware of your own biases, not only those of others. When you make an argument or draw your own conclusions, you can ask similar questions about your own writing:

• Am I only considering evidence that supports my preconceptions?
• Is my argument expressed clearly and backed up with credible sources?
• Would I be convinced by this argument coming from someone else?

If you want to know more about ChatGPT, AI tools , citation , and plagiarism , make sure to check out some of our other articles with explanations and examples.

• ChatGPT vs human editor
• ChatGPT citations
• Is ChatGPT trustworthy?
• Using ChatGPT for your studies
• What is ChatGPT?
• Chicago style
• Paraphrasing

 Plagiarism

• Types of plagiarism
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• Avoiding plagiarism
• Academic integrity
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• Common knowledge

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Critical thinking refers to the ability to evaluate information and to be aware of biases or assumptions, including your own.

Like information literacy , it involves evaluating arguments, identifying and solving problems in an objective and systematic way, and clearly communicating your ideas.

Critical thinking skills include the ability to:

You can assess information and arguments critically by asking certain questions about the source. You can use the CRAAP test , focusing on the currency , relevance , authority , accuracy , and purpose of a source of information.

Ask questions such as:

• Who is the author? Are they an expert?
• How do they make their argument? Is it backed up by evidence?

A credible source should pass the CRAAP test  and follow these guidelines:

• The information should be up to date and current.
• The author and publication should be a trusted authority on the subject you are researching.
• The sources the author cited should be easy to find, clear, and unbiased.
• For a web source, the URL and layout should signify that it is trustworthy.

Information literacy refers to a broad range of skills, including the ability to find, evaluate, and use sources of information effectively.

Being information literate means that you:

• Know how to find credible sources
• Use relevant sources to inform your research
• Understand what constitutes plagiarism
• Know how to cite your sources correctly

Confirmation bias is the tendency to search, interpret, and recall information in a way that aligns with our pre-existing values, opinions, or beliefs. It refers to the ability to recollect information best when it amplifies what we already believe. Relatedly, we tend to forget information that contradicts our opinions.

Although selective recall is a component of confirmation bias, it should not be confused with recall bias.

On the other hand, recall bias refers to the differences in the ability between study participants to recall past events when self-reporting is used. This difference in accuracy or completeness of recollection is not related to beliefs or opinions. Rather, recall bias relates to other factors, such as the length of the recall period, age, and the characteristics of the disease under investigation.

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Defining Critical Thinking

• A Brief History of the Idea of Critical Thinking
• Critical Thinking: Basic Questions & Answers
• Our Conception of Critical Thinking
• Sumner’s Definition of Critical Thinking
• Research in Critical Thinking
• Critical Societies: Thoughts from the Past

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Critical Thinking

Developing the right mindset and skills.

By the Mind Tools Content Team

We make hundreds of decisions every day and, whether we realize it or not, we're all critical thinkers.

We use critical thinking each time we weigh up our options, prioritize our responsibilities, or think about the likely effects of our actions. It's a crucial skill that helps us to cut out misinformation and make wise decisions. The trouble is, we're not always very good at it!

In this article, we'll explore the key skills that you need to develop your critical thinking skills, and how to adopt a critical thinking mindset, so that you can make well-informed decisions.

What Is Critical Thinking?

Critical thinking is the discipline of rigorously and skillfully using information, experience, observation, and reasoning to guide your decisions, actions, and beliefs. You'll need to actively question every step of your thinking process to do it well.

Collecting, analyzing and evaluating information is an important skill in life, and a highly valued asset in the workplace. People who score highly in critical thinking assessments are also rated by their managers as having good problem-solving skills, creativity, strong decision-making skills, and good overall performance. [1]

Key Critical Thinking Skills

Critical thinkers possess a set of key characteristics which help them to question information and their own thinking. Focus on the following areas to develop your critical thinking skills:

Being willing and able to explore alternative approaches and experimental ideas is crucial. Can you think through "what if" scenarios, create plausible options, and test out your theories? If not, you'll tend to write off ideas and options too soon, so you may miss the best answer to your situation.

To nurture your curiosity, stay up to date with facts and trends. You'll overlook important information if you allow yourself to become "blinkered," so always be open to new information.

But don't stop there! Look for opposing views or evidence to challenge your information, and seek clarification when things are unclear. This will help you to reassess your beliefs and make a well-informed decision later. Read our article, Opening Closed Minds , for more ways to stay receptive.

Logical Thinking

You must be skilled at reasoning and extending logic to come up with plausible options or outcomes.

It's also important to emphasize logic over emotion. Emotion can be motivating but it can also lead you to take hasty and unwise action, so control your emotions and be cautious in your judgments. Know when a conclusion is "fact" and when it is not. "Could-be-true" conclusions are based on assumptions and must be tested further. Read our article, Logical Fallacies , for help with this.

Use creative problem solving to balance cold logic. By thinking outside of the box you can identify new possible outcomes by using pieces of information that you already have.

Self-Awareness

Many of the decisions we make in life are subtly informed by our values and beliefs. These influences are called cognitive biases and it can be difficult to identify them in ourselves because they're often subconscious.

Practicing self-awareness will allow you to reflect on the beliefs you have and the choices you make. You'll then be better equipped to challenge your own thinking and make improved, unbiased decisions.

One particularly useful tool for critical thinking is the Ladder of Inference . It allows you to test and validate your thinking process, rather than jumping to poorly supported conclusions.

Developing a Critical Thinking Mindset

Combine the above skills with the right mindset so that you can make better decisions and adopt more effective courses of action. You can develop your critical thinking mindset by following this process:

Gather Information

First, collect data, opinions and facts on the issue that you need to solve. Draw on what you already know, and turn to new sources of information to help inform your understanding. Consider what gaps there are in your knowledge and seek to fill them. And look for information that challenges your assumptions and beliefs.

Be sure to verify the authority and authenticity of your sources. Not everything you read is true! Use this checklist to ensure that your information is valid:

• Are your information sources trustworthy ? (For example, well-respected authors, trusted colleagues or peers, recognized industry publications, websites, blogs, etc.)
• Is the information you have gathered up to date ?
• Has the information received any direct criticism ?
• Does the information have any errors or inaccuracies ?
• Is there any evidence to support or corroborate the information you have gathered?
• Is the information you have gathered subjective or biased in any way? (For example, is it based on opinion, rather than fact? Is any of the information you have gathered designed to promote a particular service or organization?)

If any information appears to be irrelevant or invalid, don't include it in your decision making. But don't omit information just because you disagree with it, or your final decision will be flawed and bias.

Now observe the information you have gathered, and interpret it. What are the key findings and main takeaways? What does the evidence point to? Start to build one or two possible arguments based on what you have found.

You'll need to look for the details within the mass of information, so use your powers of observation to identify any patterns or similarities. You can then analyze and extend these trends to make sensible predictions about the future.

To help you to sift through the multiple ideas and theories, it can be useful to group and order items according to their characteristics. From here, you can compare and contrast the different items. And once you've determined how similar or different things are from one another, Paired Comparison Analysis can help you to analyze them.

The final step involves challenging the information and rationalizing its arguments.

Apply the laws of reason (induction, deduction, analogy) to judge an argument and determine its merits. To do this, it's essential that you can determine the significance and validity of an argument to put it in the correct perspective. Take a look at our article, Rational Thinking , for more information about how to do this.

Once you have considered all of the arguments and options rationally, you can finally make an informed decision.

Afterward, take time to reflect on what you have learned and what you found challenging. Step back from the detail of your decision or problem, and look at the bigger picture. Record what you've learned from your observations and experience.

Critical thinking involves rigorously and skilfully using information, experience, observation, and reasoning to guide your decisions, actions and beliefs. It's a useful skill in the workplace and in life.

You'll need to be curious and creative to explore alternative possibilities, but rational to apply logic, and self-aware to identify when your beliefs could affect your decisions or actions.

You can demonstrate a high level of critical thinking by validating your information, analyzing its meaning, and finally evaluating the argument.

Critical Thinking Infographic

See Critical Thinking represented in our infographic: An Elementary Guide to Critical Thinking .

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What is Critical Thinking?

Critical thinking is the ability to think clearly and rationally, understanding the logical connection between ideas.  Critical thinking has been the subject of much debate and thought since the time of early Greek philosophers such as Plato and Socrates and has continued to be a subject of discussion into the modern age, for example the ability to recognise fake news .

Critical thinking might be described as the ability to engage in reflective and independent thinking.

In essence, critical thinking requires you to use your ability to reason. It is about being an active learner rather than a passive recipient of information.

Critical thinkers rigorously question ideas and assumptions rather than accepting them at face value. They will always seek to determine whether the ideas, arguments and findings represent the entire picture and are open to finding that they do not.

Critical thinkers will identify, analyse and solve problems systematically rather than by intuition or instinct.

Someone with critical thinking skills can:

Understand the links between ideas.

Determine the importance and relevance of arguments and ideas.

Recognise, build and appraise arguments.

Identify inconsistencies and errors in reasoning.

Approach problems in a consistent and systematic way.

Reflect on the justification of their own assumptions, beliefs and values.

Critical thinking is thinking about things in certain ways so as to arrive at the best possible solution in the circumstances that the thinker is aware of. In more everyday language, it is a way of thinking about whatever is presently occupying your mind so that you come to the best possible conclusion.

Critical Thinking is:

A way of thinking about particular things at a particular time; it is not the accumulation of facts and knowledge or something that you can learn once and then use in that form forever, such as the nine times table you learn and use in school.

The Skills We Need for Critical Thinking

The skills that we need in order to be able to think critically are varied and include observation, analysis, interpretation, reflection, evaluation, inference, explanation, problem solving, and decision making.

Specifically we need to be able to:

Think about a topic or issue in an objective and critical way.

Identify the different arguments there are in relation to a particular issue.

Evaluate a point of view to determine how strong or valid it is.

Recognise any weaknesses or negative points that there are in the evidence or argument.

Notice what implications there might be behind a statement or argument.

Provide structured reasoning and support for an argument that we wish to make.

The Critical Thinking Process

You should be aware that none of us think critically all the time.

Sometimes we think in almost any way but critically, for example when our self-control is affected by anger, grief or joy or when we are feeling just plain ‘bloody minded’.

On the other hand, the good news is that, since our critical thinking ability varies according to our current mindset, most of the time we can learn to improve our critical thinking ability by developing certain routine activities and applying them to all problems that present themselves.

Once you understand the theory of critical thinking, improving your critical thinking skills takes persistence and practice.

Try this simple exercise to help you to start thinking critically.

Think of something that someone has recently told you. Then ask yourself the following questions:

Who said it?

Someone you know? Someone in a position of authority or power? Does it matter who told you this?

What did they say?

Did they give facts or opinions? Did they provide all the facts? Did they leave anything out?

Where did they say it?

Was it in public or in private? Did other people have a chance to respond an provide an alternative account?

When did they say it?

Was it before, during or after an important event? Is timing important?

Why did they say it?

Did they explain the reasoning behind their opinion? Were they trying to make someone look good or bad?

How did they say it?

Were they happy or sad, angry or indifferent? Did they write it or say it? Could you understand what was said?

What are you Aiming to Achieve?

One of the most important aspects of critical thinking is to decide what you are aiming to achieve and then make a decision based on a range of possibilities.

Once you have clarified that aim for yourself you should use it as the starting point in all future situations requiring thought and, possibly, further decision making. Where needed, make your workmates, family or those around you aware of your intention to pursue this goal. You must then discipline yourself to keep on track until changing circumstances mean you have to revisit the start of the decision making process.

However, there are things that get in the way of simple decision making. We all carry with us a range of likes and dislikes, learnt behaviours and personal preferences developed throughout our lives; they are the hallmarks of being human. A major contribution to ensuring we think critically is to be aware of these personal characteristics, preferences and biases and make allowance for them when considering possible next steps, whether they are at the pre-action consideration stage or as part of a rethink caused by unexpected or unforeseen impediments to continued progress.

The more clearly we are aware of ourselves, our strengths and weaknesses, the more likely our critical thinking will be productive.

The Benefit of Foresight

Perhaps the most important element of thinking critically is foresight.

Almost all decisions we make and implement don’t prove disastrous if we find reasons to abandon them. However, our decision making will be infinitely better and more likely to lead to success if, when we reach a tentative conclusion, we pause and consider the impact on the people and activities around us.

The elements needing consideration are generally numerous and varied. In many cases, consideration of one element from a different perspective will reveal potential dangers in pursuing our decision.

For instance, moving a business activity to a new location may improve potential output considerably but it may also lead to the loss of skilled workers if the distance moved is too great. Which of these is the more important consideration? Is there some way of lessening the conflict?

These are the sort of problems that may arise from incomplete critical thinking, a demonstration perhaps of the critical importance of good critical thinking.

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In Summary:

Critical thinking is aimed at achieving the best possible outcomes in any situation. In order to achieve this it must involve gathering and evaluating information from as many different sources possible.

Critical thinking requires a clear, often uncomfortable, assessment of your personal strengths, weaknesses and preferences and their possible impact on decisions you may make.

Critical thinking requires the development and use of foresight as far as this is possible. As Doris Day sang, “the future’s not ours to see”.

Implementing the decisions made arising from critical thinking must take into account an assessment of possible outcomes and ways of avoiding potentially negative outcomes, or at least lessening their impact.

• Critical thinking involves reviewing the results of the application of decisions made and implementing change where possible.

It might be thought that we are overextending our demands on critical thinking in expecting that it can help to construct focused meaning rather than examining the information given and the knowledge we have acquired to see if we can, if necessary, construct a meaning that will be acceptable and useful.

After all, almost no information we have available to us, either externally or internally, carries any guarantee of its life or appropriateness.  Neat step-by-step instructions may provide some sort of trellis on which our basic understanding of critical thinking can blossom but it doesn’t and cannot provide any assurance of certainty, utility or longevity.

Continue to: Critical Thinking and Fake News Critical Reading

See also: Analytical Skills Understanding and Addressing Conspiracy Theories Introduction to Neuro-Linguistic Programming (NLP)

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Critical Thinking and Decision-Making  - What is Critical Thinking?

Critical thinking and decision-making  -, what is critical thinking, critical thinking and decision-making what is critical thinking.

Critical Thinking and Decision-Making: What is Critical Thinking?

Lesson 1: what is critical thinking, what is critical thinking.

Critical thinking is a term that gets thrown around a lot. You've probably heard it used often throughout the years whether it was in school, at work, or in everyday conversation. But when you stop to think about it, what exactly is critical thinking and how do you do it ?

Watch the video below to learn more about critical thinking.

Simply put, critical thinking is the act of deliberately analyzing information so that you can make better judgements and decisions . It involves using things like logic, reasoning, and creativity, to draw conclusions and generally understand things better.

This may sound like a pretty broad definition, and that's because critical thinking is a broad skill that can be applied to so many different situations. You can use it to prepare for a job interview, manage your time better, make decisions about purchasing things, and so much more.

The process

As humans, we are constantly thinking . It's something we can't turn off. But not all of it is critical thinking. No one thinks critically 100% of the time... that would be pretty exhausting! Instead, it's an intentional process , something that we consciously use when we're presented with difficult problems or important decisions.

Improving your critical thinking

In order to become a better critical thinker, it's important to ask questions when you're presented with a problem or decision, before jumping to any conclusions. You can start with simple ones like What do I currently know? and How do I know this? These can help to give you a better idea of what you're working with and, in some cases, simplify more complex issues.  

Real-world applications

Let's take a look at how we can use critical thinking to evaluate online information . Say a friend of yours posts a news article on social media and you're drawn to its headline. If you were to use your everyday automatic thinking, you might accept it as fact and move on. But if you were thinking critically, you would first analyze the available information and ask some questions :

• What's the source of this article?
• Is the headline potentially misleading?
• What are my friend's general beliefs?
• Do their beliefs inform why they might have shared this?

After analyzing all of this information, you can draw a conclusion about whether or not you think the article is trustworthy.

Critical thinking has a wide range of real-world applications . It can help you to make better decisions, become more hireable, and generally better understand the world around you.

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Global Cognition

Critical thinking and the internet: skills for a new era.

by Winston Sieck updated September 12, 2021

Learning has gotten complicated.

We often need to answer challenging technical and scientific questions to get by in our everyday life.

The web has become the default means to get those answers. Yet learning from the internet is fraught with difficulty.

Searching, sorting, and synthesizing the convoluted maze of potential answers requires a special set of critical thinking skills , tailored to the internet age.

How can we bring critical thinking and the internet together?

Are there specific cognitive skills that we can measure and teach?

Lucia Mason, Nicola Ariasi, and Angela Boldrin of the University of Padova conducted a study on critical thinking and the internet. They published their findings in, “Learning and Instruction.”

The researchers used a think-aloud method to uncover the critical thinking skills students used when employing the web to delve into a controversial and unfamiliar topic. In a think-aloud method , study participants say everything that goes through their mind while completing a task.

The researchers hypothesized that certain aspects of critical thinking are particularly relevant in the web context. The cognitive skills that Mason and colleagues investigated are closely related to beliefs about knowledge and learning itself .

In Mason’s study, participants scoured the Web to try to address the question, “Can the continual use of mobile, or cell, phones be a health hazard?”

They were also told that they would need to write an essay afterwards.

The topic is typical of tough issues we often face. It’s complex and personal. A good understanding of the answer requires us to learn a bit about electromagnetic fields and their relation to human physiology. How we answer affects our communication choices in no small way.

After collecting the data, Mason’s team studied transcripts of the participant’s thought processes, and created a rubric for critical thinking and the internet.

The researchers classified aspects of critical thinking that they expected to influence learning from the internet.

Mason’s team also graded the degree of sophistication of the thought processes. Their rubric highlights a decent set of critical thinking skills for the internet that you can draw on and use yourself:

Judging the Credibility of Websites

Three general approaches you might use to evaluate sources on the internet are:

• Less sophisticated : Sites that are more popular have credible information (not recommended!)
• Relatively sophisticated : Credible sites are those that are established authorities on the topic (e.g. a ministry of health), and are relatively free of bias
• More sophisticated : Seek out websites for scientific research institutes as most credible (for a science question, anyway)

Examining Justifications for Specific Claims

Critical thinking skills for examining specific claims students find on the web include the following:

• Relatively sophisticated : Check whether the facts agree with what you already know to be true. For example, for the cell phone problem does a claim about electromagnetism fit with what you learned in school?
• More sophisticated : Look for the scientific evidence. Is the claim justified by scientific research that was carried out to address the issue?

Pulling all the Facts Together

A good study tip is to pull together ideas from different sources. But you want to do it in a deep way:

• Less sophisticated . Are you just using multiple sources to “add up” your knowledge? This approach doesn’t take into account that the sites may offer conflicting stories (perhaps in subtle ways) about what’s going on.
• Relatively sophisticated . Compare the information that you find, both in terms of the basic facts and the overall story the facts are used to tell. If there is some opposition, check up on the specific point of disagreement and see what you can resolve for yourself.
• More sophisticated . In addition to your own comparisons, what discussion is there about the level of consensus among scientists on key points? My personal experience is that scientists always seem to find nuances to disagree about, no matter how much has been learned in their field. Relatively strong agreement among scientists on a specific claim can give you a pretty good feeling about it.

OK, there’s a handy rubric to use in your lessons involving critical thinking and the internet.

But, is it useful?

Do people who spontaneously use the relatively and more sophisticated strategies actually learn more from the web?

Mason and her team found that they did.

The researchers analyzed the correlation between sophistication of strategies revealed in the think aloud protocols with the quality of the final essays written and graded after the study.

The participants who tended to engage in more sophisticated critical thinking in the internet learning session, performed better on the essay test.

Being able to effectively learn from the web is essential in modern life.

Fortunately, there appear to be a few general thinking skills that students can master to get the most out of the wealth of information on the web. Fostering these skills is a useful step to bring critical thinking and the internet together.

 Image Credit: bill2499

Mason, L., Ariasi, N., & Boldrin, A. (2011). Epistemic beliefs in action: Spontaneous reflections about knowledge and knowing during online information searching and their influence on learning Learning and Instruction, 21 (1), 137-151 DOI: 10.1016/j.learninstruc.2010.01.001

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Introduction to Logic and Critical Thinking

(10 reviews)

Matthew Van Cleave, Lansing Community College

Copyright Year: 2016

Publisher: Matthew J. Van Cleave

Language: English

Formats Available

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Reviewed by "yusef" Alexander Hayes, Professor, North Shore Community College on 6/9/21

Formal and informal reasoning, argument structure, and fallacies are covered comprehensively, meeting the author's goal of both depth and succinctness. read more

Comprehensiveness rating: 5 see less

Formal and informal reasoning, argument structure, and fallacies are covered comprehensively, meeting the author's goal of both depth and succinctness.

Content Accuracy rating: 5

The book is accurate.

Relevance/Longevity rating: 5

While many modern examples are used, and they are helpful, they are not necessarily needed. The usefulness of logical principles and skills have proved themselves, and this text presents them clearly with many examples.

Clarity rating: 5

It is obvious that the author cares about their subject, audience, and students. The text is comprehensible and interesting.

Consistency rating: 5

The format is easy to understand and is consistent in framing.

Modularity rating: 5

This text would be easy to adapt.

Organization/Structure/Flow rating: 5

The organization is excellent, my one suggestion would be a concluding chapter.

Interface rating: 5

I accessed the PDF version and it would be easy to work with.

Grammatical Errors rating: 5

The writing is excellent.

Cultural Relevance rating: 5

This is not an offensive text.

Reviewed by Susan Rottmann, Part-time Lecturer, University of Southern Maine on 3/2/21

I reviewed this book for a course titled "Creative and Critical Inquiry into Modern Life." It won't meet all my needs for that course, but I haven't yet found a book that would. I wanted to review this one because it states in the preface that it... read more

Comprehensiveness rating: 4 see less

I reviewed this book for a course titled "Creative and Critical Inquiry into Modern Life." It won't meet all my needs for that course, but I haven't yet found a book that would. I wanted to review this one because it states in the preface that it fits better for a general critical thinking course than for a true logic course. I'm not sure that I'd agree. I have been using Browne and Keeley's "Asking the Right Questions: A Guide to Critical Thinking," and I think that book is a better introduction to critical thinking for non-philosophy majors. However, the latter is not open source so I will figure out how to get by without it in the future. Overall, the book seems comprehensive if the subject is logic. The index is on the short-side, but fine. However, one issue for me is that there are no page numbers on the table of contents, which is pretty annoying if you want to locate particular sections.

Content Accuracy rating: 4

I didn't find any errors. In general the book uses great examples. However, they are very much based in the American context, not for an international student audience. Some effort to broaden the chosen examples would make the book more widely applicable.

Relevance/Longevity rating: 4

I think the book will remain relevant because of the nature of the material that it addresses, however there will be a need to modify the examples in future editions and as the social and political context changes.

Clarity rating: 3

The text is lucid, but I think it would be difficult for introductory-level students who are not philosophy majors. For example, in Browne and Keeley's "Asking the Right Questions: A Guide to Critical Thinking," the sub-headings are very accessible, such as "Experts cannot rescue us, despite what they say" or "wishful thinking: perhaps the biggest single speed bump on the road to critical thinking." By contrast, Van Cleave's "Introduction to Logic and Critical Thinking" has more subheadings like this: "Using your own paraphrases of premises and conclusions to reconstruct arguments in standard form" or "Propositional logic and the four basic truth functional connectives." If students are prepared very well for the subject, it would work fine, but for students who are newly being introduced to critical thinking, it is rather technical.

It seems to be very consistent in terms of its terminology and framework.

Modularity rating: 4

The book is divided into 4 chapters, each having many sub-chapters. In that sense, it is readily divisible and modular. However, as noted above, there are no page numbers on the table of contents, which would make assigning certain parts rather frustrating. Also, I'm not sure why the book is only four chapter and has so many subheadings (for instance 17 in Chapter 2) and a length of 242 pages. Wouldn't it make more sense to break up the book into shorter chapters? I think this would make it easier to read and to assign in specific blocks to students.

Organization/Structure/Flow rating: 4

The organization of the book is fine overall, although I think adding page numbers to the table of contents and breaking it up into more separate chapters would help it to be more easily navigable.

Interface rating: 4

The book is very simply presented. In my opinion it is actually too simple. There are few boxes or diagrams that highlight and explain important points.

The text seems fine grammatically. I didn't notice any errors.

The book is written with an American audience in mind, but I did not notice culturally insensitive or offensive parts.

Overall, this book is not for my course, but I think it could work well in a philosophy course.

Reviewed by Daniel Lee, Assistant Professor of Economics and Leadership, Sweet Briar College on 11/11/19

This textbook is not particularly comprehensive (4 chapters long), but I view that as a benefit. In fact, I recommend it for use outside of traditional logic classes, but rather interdisciplinary classes that evaluate argument read more

Comprehensiveness rating: 3 see less

This textbook is not particularly comprehensive (4 chapters long), but I view that as a benefit. In fact, I recommend it for use outside of traditional logic classes, but rather interdisciplinary classes that evaluate argument

To the best of my ability, I regard this content as accurate, error-free, and unbiased

The book is broadly relevant and up-to-date, with a few stray temporal references (sydney olympics, particular presidencies). I don't view these time-dated examples as problematic as the logical underpinnings are still there and easily assessed

Clarity rating: 4

My only pushback on clarity is I didn't find the distinction between argument and explanation particularly helpful/useful/easy to follow. However, this experience may have been unique to my class.

To the best of my ability, I regard this content as internally consistent

I found this text quite modular, and was easily able to integrate other texts into my lessons and disregard certain chapters or sub-sections

The book had a logical and consistent structure, but to the extent that there are only 4 chapters, there isn't much scope for alternative approaches here

No problems with the book's interface

The text is grammatically sound

Cultural Relevance rating: 4

Perhaps the text could have been more universal in its approach. While I didn't find the book insensitive per-se, logic can be tricky here because the point is to evaluate meaningful (non-trivial) arguments, but any argument with that sense of gravity can also be traumatic to students (abortion, death penalty, etc)

No additional comments

Reviewed by Lisa N. Thomas-Smith, Graduate Part-time Instructor, CU Boulder on 7/1/19

The text covers all the relevant technical aspects of introductory logic and critical thinking, and covers them well. A separate glossary would be quite helpful to students. However, the terms are clearly and thoroughly explained within the text,... read more

The text covers all the relevant technical aspects of introductory logic and critical thinking, and covers them well. A separate glossary would be quite helpful to students. However, the terms are clearly and thoroughly explained within the text, and the index is very thorough.

The content is excellent. The text is thorough and accurate with no errors that I could discern. The terminology and exercises cover the material nicely and without bias.

The text should easily stand the test of time. The exercises are excellent and would be very helpful for students to internalize correct critical thinking practices. Because of the logical arrangement of the text and the many sub-sections, additional material should be very easy to add.

The text is extremely clearly and simply written. I anticipate that a diligent student could learn all of the material in the text with little additional instruction. The examples are relevant and easy to follow.

The text did not confuse terms or use inconsistent terminology, which is very important in a logic text. The discipline often uses multiple terms for the same concept, but this text avoids that trap nicely.

The text is fairly easily divisible. Since there are only four chapters, those chapters include large blocks of information. However, the chapters themselves are very well delineated and could be easily broken up so that parts could be left out or covered in a different order from the text.

The flow of the text is excellent. All of the information is handled solidly in an order that allows the student to build on the information previously covered.

The PDF Table of Contents does not include links or page numbers which would be very helpful for navigation. Other than that, the text was very easy to navigate. All the images, charts, and graphs were very clear

I found no grammatical errors in the text.

Cultural Relevance rating: 3

The text including examples and exercises did not seem to be offensive or insensitive in any specific way. However, the examples included references to black and white people, but few others. Also, the text is very American specific with many examples from and for an American audience. More diversity, especially in the examples, would be appropriate and appreciated.

Reviewed by Leslie Aarons, Associate Professor of Philosophy, CUNY LaGuardia Community College on 5/16/19

This is an excellent introductory (first-year) Logic and Critical Thinking textbook. The book covers the important elementary information, clearly discussing such things as the purpose and basic structure of an argument; the difference between an... read more

This is an excellent introductory (first-year) Logic and Critical Thinking textbook. The book covers the important elementary information, clearly discussing such things as the purpose and basic structure of an argument; the difference between an argument and an explanation; validity; soundness; and the distinctions between an inductive and a deductive argument in accessible terms in the first chapter. It also does a good job introducing and discussing informal fallacies (Chapter 4). The incorporation of opportunities to evaluate real-world arguments is also very effective. Chapter 2 also covers a number of formal methods of evaluating arguments, such as Venn Diagrams and Propositional logic and the four basic truth functional connectives, but to my mind, it is much more thorough in its treatment of Informal Logic and Critical Thinking skills, than it is of formal logic. I also appreciated that Van Cleave’s book includes exercises with answers and an index, but there is no glossary; which I personally do not find detracts from the book's comprehensiveness.

Overall, Van Cleave's book is error-free and unbiased. The language used is accessible and engaging. There were no glaring inaccuracies that I was able to detect.

Van Cleave's Textbook uses relevant, contemporary content that will stand the test of time, at least for the next few years. Although some examples use certain subjects like former President Obama, it does so in a useful manner that inspires the use of critical thinking skills. There are an abundance of examples that inspire students to look at issues from many different political viewpoints, challenging students to practice evaluating arguments, and identifying fallacies. Many of these exercises encourage students to critique issues, and recognize their own inherent reader-biases and challenge their own beliefs--hallmarks of critical thinking.

As mentioned previously, the author has an accessible style that makes the content relatively easy to read and engaging. He also does a suitable job explaining jargon/technical language that is introduced in the textbook.

Van Cleave uses terminology consistently and the chapters flow well. The textbook orients the reader by offering effective introductions to new material, step-by-step explanations of the material, as well as offering clear summaries of each lesson.

This textbook's modularity is really quite good. Its language and structure are not overly convoluted or too-lengthy, making it convenient for individual instructors to adapt the materials to suit their methodological preferences.

The topics in the textbook are presented in a logical and clear fashion. The structure of the chapters are such that it is not necessary to have to follow the chapters in their sequential order, and coverage of material can be adapted to individual instructor's preferences.

The textbook is free of any problematic interface issues. Topics, sections and specific content are accessible and easy to navigate. Overall it is user-friendly.

I did not find any significant grammatical issues with the textbook.

The textbook is not culturally insensitive, making use of a diversity of inclusive examples. Materials are especially effective for first-year critical thinking/logic students.

I intend to adopt Van Cleave's textbook for a Critical Thinking class I am teaching at the Community College level. I believe that it will help me facilitate student-learning, and will be a good resource to build additional classroom activities from the materials it provides.

Reviewed by Jennie Harrop, Chair, Department of Professional Studies, George Fox University on 3/27/18

While the book is admirably comprehensive, its extensive details within a few short chapters may feel overwhelming to students. The author tackles an impressive breadth of concepts in Chapter 1, 2, 3, and 4, which leads to 50-plus-page chapters... read more

While the book is admirably comprehensive, its extensive details within a few short chapters may feel overwhelming to students. The author tackles an impressive breadth of concepts in Chapter 1, 2, 3, and 4, which leads to 50-plus-page chapters that are dense with statistical analyses and critical vocabulary. These topics are likely better broached in manageable snippets rather than hefty single chapters.

The ideas addressed in Introduction to Logic and Critical Thinking are accurate but at times notably political. While politics are effectively used to exemplify key concepts, some students may be distracted by distinct political leanings.

The terms and definitions included are relevant, but the examples are specific to the current political, cultural, and social climates, which could make the materials seem dated in a few years without intentional and consistent updates.

While the reasoning is accurate, the author tends to complicate rather than simplify -- perhaps in an effort to cover a spectrum of related concepts. Beginning readers are likely to be overwhelmed and under-encouraged by his approach.

Consistency rating: 3

The four chapters are somewhat consistent in their play of definition, explanation, and example, but the structure of each chapter varies according to the concepts covered. In the third chapter, for example, key ideas are divided into sub-topics numbering from 3.1 to 3.10. In the fourth chapter, the sub-divisions are further divided into sub-sections numbered 4.1.1-4.1.5, 4.2.1-4.2.2, and 4.3.1 to 4.3.6. Readers who are working quickly to master new concepts may find themselves mired in similarly numbered subheadings, longing for a grounded concepts on which to hinge other key principles.

Modularity rating: 3

The book's four chapters make it mostly self-referential. The author would do well to beak this text down into additional subsections, easing readers' accessibility.

The content of the book flows logically and well, but the information needs to be better sub-divided within each larger chapter, easing the student experience.

The book's interface is effective, allowing readers to move from one section to the next with a single click. Additional sub-sections would ease this interplay even further.

Grammatical Errors rating: 4

Some minor errors throughout.

For the most part, the book is culturally neutral, avoiding direct cultural references in an effort to remain relevant.

Reviewed by Yoichi Ishida, Assistant Professor of Philosophy, Ohio University on 2/1/18

This textbook covers enough topics for a first-year course on logic and critical thinking. Chapter 1 covers the basics as in any standard textbook in this area. Chapter 2 covers propositional logic and categorical logic. In propositional logic,... read more

This textbook covers enough topics for a first-year course on logic and critical thinking. Chapter 1 covers the basics as in any standard textbook in this area. Chapter 2 covers propositional logic and categorical logic. In propositional logic, this textbook does not cover suppositional arguments, such as conditional proof and reductio ad absurdum. But other standard argument forms are covered. Chapter 3 covers inductive logic, and here this textbook introduces probability and its relationship with cognitive biases, which are rarely discussed in other textbooks. Chapter 4 introduces common informal fallacies. The answers to all the exercises are given at the end. However, the last set of exercises is in Chapter 3, Section 5. There are no exercises in the rest of the chapter. Chapter 4 has no exercises either. There is index, but no glossary.

The textbook is accurate.

The content of this textbook will not become obsolete soon.

The textbook is written clearly.

The textbook is internally consistent.

The textbook is fairly modular. For example, Chapter 3, together with a few sections from Chapter 1, can be used as a short introduction to inductive logic.

The textbook is well-organized.

There are no interface issues.

I did not find any grammatical errors.

This textbook is relevant to a first semester logic or critical thinking course.

Reviewed by Payal Doctor, Associate Professro, LaGuardia Community College on 2/1/18

This text is a beginner textbook for arguments and propositional logic. It covers the basics of identifying arguments, building arguments, and using basic logic to construct propositions and arguments. It is quite comprehensive for a beginner... read more

This text is a beginner textbook for arguments and propositional logic. It covers the basics of identifying arguments, building arguments, and using basic logic to construct propositions and arguments. It is quite comprehensive for a beginner book, but seems to be a good text for a course that needs a foundation for arguments. There are exercises on creating truth tables and proofs, so it could work as a logic primer in short sessions or with the addition of other course content.

The books is accurate in the information it presents. It does not contain errors and is unbiased. It covers the essential vocabulary clearly and givens ample examples and exercises to ensure the student understands the concepts

The content of the book is up to date and can be easily updated. Some examples are very current for analyzing the argument structure in a speech, but for this sort of text understandable examples are important and the author uses good examples.

The book is clear and easy to read. In particular, this is a good text for community college students who often have difficulty with reading comprehension. The language is straightforward and concepts are well explained.

The book is consistent in terminology, formatting, and examples. It flows well from one topic to the next, but it is also possible to jump around the text without loosing the voice of the text.

The books is broken down into sub units that make it easy to assign short blocks of content at a time. Later in the text, it does refer to a few concepts that appear early in that text, but these are all basic concepts that must be used to create a clear and understandable text. No sections are too long and each section stays on topic and relates the topic to those that have come before when necessary.

The flow of the text is logical and clear. It begins with the basic building blocks of arguments, and practice identifying more and more complex arguments is offered. Each chapter builds up from the previous chapter in introducing propositional logic, truth tables, and logical arguments. A select number of fallacies are presented at the end of the text, but these are related to topics that were presented before, so it makes sense to have these last.

The text is free if interface issues. I used the PDF and it worked fine on various devices without loosing formatting.

1. The book contains no grammatical errors.

The text is culturally sensitive, but examples used are a bit odd and may be objectionable to some students. For instance, President Obama's speech on Syria is used to evaluate an extended argument. This is an excellent example and it is explained well, but some who disagree with Obama's policies may have trouble moving beyond their own politics. However, other examples look at issues from all political viewpoints and ask students to evaluate the argument, fallacy, etc. and work towards looking past their own beliefs. Overall this book does use a variety of examples that most students can understand and evaluate.

My favorite part of this book is that it seems to be written for community college students. My students have trouble understanding readings in the New York Times, so it is nice to see a logic and critical thinking text use real language that students can understand and follow without the constant need of a dictionary.

Reviewed by Rebecca Owen, Adjunct Professor, Writing, Chemeketa Community College on 6/20/17

This textbook is quite thorough--there are conversational explanations of argument structure and logic. I think students will be happy with the conversational style this author employs. Also, there are many examples and exercises using current... read more

This textbook is quite thorough--there are conversational explanations of argument structure and logic. I think students will be happy with the conversational style this author employs. Also, there are many examples and exercises using current events, funny scenarios, or other interesting ways to evaluate argument structure and validity. The third section, which deals with logical fallacies, is very clear and comprehensive. My only critique of the material included in the book is that the middle section may be a bit dense and math-oriented for learners who appreciate the more informal, informative style of the first and third section. Also, the book ends rather abruptly--it moves from a description of a logical fallacy to the answers for the exercises earlier in the text.

The content is very reader-friendly, and the author writes with authority and clarity throughout the text. There are a few surface-level typos (Starbuck's instead of Starbucks, etc.). None of these small errors detract from the quality of the content, though.

One thing I really liked about this text was the author's wide variety of examples. To demonstrate different facets of logic, he used examples from current media, movies, literature, and many other concepts that students would recognize from their daily lives. The exercises in this text also included these types of pop-culture references, and I think students will enjoy the familiarity--as well as being able to see the logical structures behind these types of references. I don't think the text will need to be updated to reflect new instances and occurrences; the author did a fine job at picking examples that are relatively timeless. As far as the subject matter itself, I don't think it will become obsolete any time soon.

The author writes in a very conversational, easy-to-read manner. The examples used are quite helpful. The third section on logical fallacies is quite easy to read, follow, and understand. A student in an argument writing class could benefit from this section of the book. The middle section is less clear, though. A student learning about the basics of logic might have a hard time digesting all of the information contained in chapter two. This material might be better in two separate chapters. I think the author loses the balance of a conversational, helpful tone and focuses too heavily on equations.

Consistency rating: 4

Terminology in this book is quite consistent--the key words are highlighted in bold. Chapters 1 and 3 follow a similar organizational pattern, but chapter 2 is where the material becomes more dense and equation-heavy. I also would have liked a closing passage--something to indicate to the reader that we've reached the end of the chapter as well as the book.

I liked the overall structure of this book. If I'm teaching an argumentative writing class, I could easily point the students to the chapters where they can identify and practice identifying fallacies, for instance. The opening chapter is clear in defining the necessary terms, and it gives the students an understanding of the toolbox available to them in assessing and evaluating arguments. Even though I found the middle section to be dense, smaller portions could be assigned.

The author does a fine job connecting each defined term to the next. He provides examples of how each defined term works in a sentence or in an argument, and then he provides practice activities for students to try. The answers for each question are listed in the final pages of the book. The middle section feels like the heaviest part of the whole book--it would take the longest time for a student to digest if assigned the whole chapter. Even though this middle section is a bit heavy, it does fit the overall structure and flow of the book. New material builds on previous chapters and sub-chapters. It ends abruptly--I didn't realize that it had ended, and all of a sudden I found myself in the answer section for those earlier exercises.

The simple layout is quite helpful! There is nothing distracting, image-wise, in this text. The table of contents is clearly arranged, and each topic is easy to find.

Tiny edits could be made (Starbuck's/Starbucks, for one). Otherwise, it is free of distracting grammatical errors.

This text is quite culturally relevant. For instance, there is one example that mentions the rumors of Barack Obama's birthplace as somewhere other than the United States. This example is used to explain how to analyze an argument for validity. The more "sensational" examples (like the Obama one above) are helpful in showing argument structure, and they can also help students see how rumors like this might gain traction--as well as help to show students how to debunk them with their newfound understanding of argument and logic.

The writing style is excellent for the subject matter, especially in the third section explaining logical fallacies. Thank you for the opportunity to read and review this text!

Reviewed by Laurel Panser, Instructor, Riverland Community College on 6/20/17

This is a review of Introduction to Logic and Critical Thinking, an open source book version 1.4 by Matthew Van Cleave. The comparison book used was Patrick J. Hurley’s A Concise Introduction to Logic 12th Edition published by Cengage as well as... read more

This is a review of Introduction to Logic and Critical Thinking, an open source book version 1.4 by Matthew Van Cleave. The comparison book used was Patrick J. Hurley’s A Concise Introduction to Logic 12th Edition published by Cengage as well as the 13th edition with the same title. Lori Watson is the second author on the 13th edition.

Competing with Hurley is difficult with respect to comprehensiveness. For example, Van Cleave’s book is comprehensive to the extent that it probably covers at least two-thirds or more of what is dealt with in most introductory, one-semester logic courses. Van Cleave’s chapter 1 provides an overview of argumentation including discerning non-arguments from arguments, premises versus conclusions, deductive from inductive arguments, validity, soundness and more. Much of Van Cleave’s chapter 1 parallel’s Hurley’s chapter 1. Hurley’s chapter 3 regarding informal fallacies is comprehensive while Van Cleave’s chapter 4 on this topic is less extensive. Categorical propositions are a topic in Van Cleave’s chapter 2; Hurley’s chapters 4 and 5 provide more instruction on this, however. Propositional logic is another topic in Van Cleave’s chapter 2; Hurley’s chapters 6 and 7 provide more information on this, though. Van Cleave did discuss messy issues of language meaning briefly in his chapter 1; that is the topic of Hurley’s chapter 2.

Van Cleave’s book includes exercises with answers and an index. A glossary was not included.

Reviews of open source textbooks typically include criteria besides comprehensiveness. These include comments on accuracy of the information, whether the book will become obsolete soon, jargon-free clarity to the extent that is possible, organization, navigation ease, freedom from grammar errors and cultural relevance; Van Cleave’s book is fine in all of these areas. Further criteria for open source books includes modularity and consistency of terminology. Modularity is defined as including blocks of learning material that are easy to assign to students. Hurley’s book has a greater degree of modularity than Van Cleave’s textbook. The prose Van Cleave used is consistent.

Van Cleave’s book will not become obsolete soon.

Van Cleave’s book has accessible prose.

Van Cleave used terminology consistently.

Van Cleave’s book has a reasonable degree of modularity.

Van Cleave’s book is organized. The structure and flow of his book is fine.

Problems with navigation are not present.

Grammar problems were not present.

Van Cleave’s book is culturally relevant.

Van Cleave’s book is appropriate for some first semester logic courses.

Table of Contents

Chapter 1: Reconstructing and analyzing arguments

• 1.1 What is an argument?
• 1.2 Identifying arguments
• 1.3 Arguments vs. explanations
• 1.4 More complex argument structures
• 1.5 Using your own paraphrases of premises and conclusions to reconstruct arguments in standard form
• 1.6 Validity
• 1.7 Soundness
• 1.8 Deductive vs. inductive arguments
• 1.9 Arguments with missing premises
• 1.10 Assuring, guarding, and discounting
• 1.11 Evaluative language
• 1.12 Evaluating a real-life argument

Chapter 2: Formal methods of evaluating arguments

• 2.1 What is a formal method of evaluation and why do we need them?
• 2.2 Propositional logic and the four basic truth functional connectives
• 2.3 Negation and disjunction
• 2.4 Using parentheses to translate complex sentences
• 2.5 “Not both” and “neither nor”
• 2.6 The truth table test of validity
• 2.7 Conditionals
• 2.8 “Unless”
• 2.9 Material equivalence
• 2.10 Tautologies, contradictions, and contingent statements
• 2.11 Proofs and the 8 valid forms of inference
• 2.12 How to construct proofs
• 2.13 Short review of propositional logic
• 2.14 Categorical logic
• 2.15 The Venn test of validity for immediate categorical inferences
• 2.16 Universal statements and existential commitment
• 2.17 Venn validity for categorical syllogisms

Chapter 3: Evaluating inductive arguments and probabilistic and statistical fallacies

• 3.1 Inductive arguments and statistical generalizations
• 3.2 Inference to the best explanation and the seven explanatory virtues
• 3.3 Analogical arguments
• 3.4 Causal arguments
• 3.5 Probability
• 3.6 The conjunction fallacy
• 3.7 The base rate fallacy
• 3.8 The small numbers fallacy
• 3.9 Regression to the mean fallacy
• 3.10 Gambler's fallacy

Chapter 4: Informal fallacies

• 4.1 Formal vs. informal fallacies
• 4.1.1 Composition fallacy
• 4.1.2 Division fallacy
• 4.1.3 Begging the question fallacy
• 4.1.4 False dichotomy
• 4.1.5 Equivocation
• 4.2 Slippery slope fallacies
• 4.2.1 Conceptual slippery slope
• 4.2.2 Causal slippery slope
• 4.3 Fallacies of relevance
• 4.3.1 Ad hominem
• 4.3.2 Straw man
• 4.3.3 Tu quoque
• 4.3.4 Genetic
• 4.3.5 Appeal to consequences
• 4.3.6 Appeal to authority

Answers to exercises Glossary/Index

Ancillary Material

About the book.

This is an introductory textbook in logic and critical thinking. The goal of the textbook is to provide the reader with a set of tools and skills that will enable them to identify and evaluate arguments. The book is intended for an introductory course that covers both formal and informal logic. As such, it is not a formal logic textbook, but is closer to what one would find marketed as a “critical thinking textbook.”

About the Contributors

Matthew Van Cleave ,   PhD, Philosophy, University of Cincinnati, 2007.  VAP at Concordia College (Moorhead), 2008-2012.  Assistant Professor at Lansing Community College, 2012-2016. Professor at Lansing Community College, 2016-

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Critical Thinking Definition, Skills, and Examples

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Critical thinking refers to the ability to analyze information objectively and make a reasoned judgment. It involves the evaluation of sources, such as data, facts, observable phenomena, and research findings.

Good critical thinkers can draw reasonable conclusions from a set of information, and discriminate between useful and less useful details to solve problems or make decisions. Employers prioritize the ability to think critically—find out why, plus see how you can demonstrate that you have this ability throughout the job application process. 

Why Do Employers Value Critical Thinking Skills?

Employers want job candidates who can evaluate a situation using logical thought and offer the best solution.

 Someone with critical thinking skills can be trusted to make decisions independently, and will not need constant handholding.

Hiring a critical thinker means that micromanaging won't be required. Critical thinking abilities are among the most sought-after skills in almost every industry and workplace. You can demonstrate critical thinking by using related keywords in your resume and cover letter, and during your interview.

Examples of Critical Thinking

The circumstances that demand critical thinking vary from industry to industry. Some examples include:

• A triage nurse analyzes the cases at hand and decides the order by which the patients should be treated.
• A plumber evaluates the materials that would best suit a particular job.
• An attorney reviews evidence and devises a strategy to win a case or to decide whether to settle out of court.
• A manager analyzes customer feedback forms and uses this information to develop a customer service training session for employees.

Promote Your Skills in Your Job Search

If critical thinking is a key phrase in the job listings you are applying for, be sure to emphasize your critical thinking skills throughout your job search.

Add Keywords to Your Resume

You can use critical thinking keywords (analytical, problem solving, creativity, etc.) in your resume. When describing your  work history , include top critical thinking skills that accurately describe you. You can also include them in your  resume summary , if you have one.

For example, your summary might read, “Marketing Associate with five years of experience in project management. Skilled in conducting thorough market research and competitor analysis to assess market trends and client needs, and to develop appropriate acquisition tactics.”

Mention Skills in Your Cover Letter

Include these critical thinking skills in your cover letter. In the body of your letter, mention one or two of these skills, and give specific examples of times when you have demonstrated them at work. Think about times when you had to analyze or evaluate materials to solve a problem.

Show the Interviewer Your Skills

You can use these skill words in an interview. Discuss a time when you were faced with a particular problem or challenge at work and explain how you applied critical thinking to solve it.

Some interviewers will give you a hypothetical scenario or problem, and ask you to use critical thinking skills to solve it. In this case, explain your thought process thoroughly to the interviewer. He or she is typically more focused on how you arrive at your solution rather than the solution itself. The interviewer wants to see you analyze and evaluate (key parts of critical thinking) the given scenario or problem.

Of course, each job will require different skills and experiences, so make sure you read the job description carefully and focus on the skills listed by the employer.

Top Critical Thinking Skills

Keep these in-demand critical thinking skills in mind as you update your resume and write your cover letter. As you've seen, you can also emphasize them at other points throughout the application process, such as your interview. 

Part of critical thinking is the ability to carefully examine something, whether it is a problem, a set of data, or a text. People with  analytical skills  can examine information, understand what it means, and properly explain to others the implications of that information.

• Asking Thoughtful Questions
• Data Analysis
• Interpretation
• Questioning Evidence
• Recognizing Patterns

Communication

Often, you will need to share your conclusions with your employers or with a group of colleagues. You need to be able to  communicate with others  to share your ideas effectively. You might also need to engage in critical thinking in a group. In this case, you will need to work with others and communicate effectively to figure out solutions to complex problems.

• Active Listening
• Collaboration
• Explanation
• Interpersonal
• Presentation
• Verbal Communication
• Written Communication

Critical thinking often involves creativity and innovation. You might need to spot patterns in the information you are looking at or come up with a solution that no one else has thought of before. All of this involves a creative eye that can take a different approach from all other approaches.

• Flexibility
• Conceptualization
• Imagination
• Drawing Connections
• Synthesizing

Open-Mindedness

To think critically, you need to be able to put aside any assumptions or judgments and merely analyze the information you receive. You need to be objective, evaluating ideas without bias.

• Objectivity
• Observation

Problem Solving

Problem-solving is another critical thinking skill that involves analyzing a problem, generating and implementing a solution, and assessing the success of the plan. Employers don’t simply want employees who can think about information critically. They also need to be able to come up with practical solutions.

• Attention to Detail
• Clarification
• Decision Making
• Groundedness
• Identifying Patterns

More Critical Thinking Skills

• Inductive Reasoning
• Deductive Reasoning
• Noticing Outliers
• Adaptability
• Emotional Intelligence
• Brainstorming
• Optimization
• Restructuring
• Integration
• Strategic Planning
• Project Management
• Ongoing Improvement
• Causal Relationships
• Case Analysis
• Diagnostics
• SWOT Analysis
• Business Intelligence
• Quantitative Data Management
• Qualitative Data Management
• Risk Management
• Scientific Method
• Consumer Behavior

Key Takeaways

• Demonstrate that you have critical thinking skills by adding relevant keywords to your resume.
• Mention pertinent critical thinking skills in your cover letter, too, and include an example of a time when you demonstrated them at work.
• Finally, highlight critical thinking skills during your interview. For instance, you might discuss a time when you were faced with a challenge at work and explain how you applied critical thinking skills to solve it.

University of Louisville. " What is Critical Thinking ."

American Management Association. " AMA Critical Skills Survey: Workers Need Higher Level Skills to Succeed in the 21st Century ."

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A Crash Course in Critical Thinking

What you need to know—and read—about one of the essential skills needed today..

Posted April 8, 2024 | Reviewed by Michelle Quirk

• In research for "A More Beautiful Question," I did a deep dive into the current crisis in critical thinking.
• Many people may think of themselves as critical thinkers, but they actually are not.
• Here is a series of questions you can ask yourself to try to ensure that you are thinking critically.

Conspiracy theories. Inability to distinguish facts from falsehoods. Widespread confusion about who and what to believe.

These are some of the hallmarks of the current crisis in critical thinking—which just might be the issue of our times. Because if people aren’t willing or able to think critically as they choose potential leaders, they’re apt to choose bad ones. And if they can’t judge whether the information they’re receiving is sound, they may follow faulty advice while ignoring recommendations that are science-based and solid (and perhaps life-saving).

Moreover, as a society, if we can’t think critically about the many serious challenges we face, it becomes more difficult to agree on what those challenges are—much less solve them.

On a personal level, critical thinking can enable you to make better everyday decisions. It can help you make sense of an increasingly complex and confusing world.

In the new expanded edition of my book A More Beautiful Question ( AMBQ ), I took a deep dive into critical thinking. Here are a few key things I learned.

First off, before you can get better at critical thinking, you should understand what it is. It’s not just about being a skeptic. When thinking critically, we are thoughtfully reasoning, evaluating, and making decisions based on evidence and logic. And—perhaps most important—while doing this, a critical thinker always strives to be open-minded and fair-minded . That’s not easy: It demands that you constantly question your assumptions and biases and that you always remain open to considering opposing views.

In today’s polarized environment, many people think of themselves as critical thinkers simply because they ask skeptical questions—often directed at, say, certain government policies or ideas espoused by those on the “other side” of the political divide. The problem is, they may not be asking these questions with an open mind or a willingness to fairly consider opposing views.

When people do this, they’re engaging in “weak-sense critical thinking”—a term popularized by the late Richard Paul, a co-founder of The Foundation for Critical Thinking . “Weak-sense critical thinking” means applying the tools and practices of critical thinking—questioning, investigating, evaluating—but with the sole purpose of confirming one’s own bias or serving an agenda.

In AMBQ , I lay out a series of questions you can ask yourself to try to ensure that you’re thinking critically. Here are some of the questions to consider:

• Why do I believe what I believe?
• Are my views based on evidence?
• Have I fairly and thoughtfully considered differing viewpoints?
• Am I truly open to changing my mind?

Of course, becoming a better critical thinker is not as simple as just asking yourself a few questions. Critical thinking is a habit of mind that must be developed and strengthened over time. In effect, you must train yourself to think in a manner that is more effortful, aware, grounded, and balanced.

For those interested in giving themselves a crash course in critical thinking—something I did myself, as I was working on my book—I thought it might be helpful to share a list of some of the books that have shaped my own thinking on this subject. As a self-interested author, I naturally would suggest that you start with the new 10th-anniversary edition of A More Beautiful Question , but beyond that, here are the top eight critical-thinking books I’d recommend.

The Demon-Haunted World: Science as a Candle in the Dark , by Carl Sagan

This book simply must top the list, because the late scientist and author Carl Sagan continues to be such a bright shining light in the critical thinking universe. Chapter 12 includes the details on Sagan’s famous “baloney detection kit,” a collection of lessons and tips on how to deal with bogus arguments and logical fallacies.

Clear Thinking: Turning Ordinary Moments Into Extraordinary Results , by Shane Parrish

The creator of the Farnham Street website and host of the “Knowledge Project” podcast explains how to contend with biases and unconscious reactions so you can make better everyday decisions. It contains insights from many of the brilliant thinkers Shane has studied.

Good Thinking: Why Flawed Logic Puts Us All at Risk and How Critical Thinking Can Save the World , by David Robert Grimes

A brilliant, comprehensive 2021 book on critical thinking that, to my mind, hasn’t received nearly enough attention . The scientist Grimes dissects bad thinking, shows why it persists, and offers the tools to defeat it.

Think Again: The Power of Knowing What You Don't Know , by Adam Grant

Intellectual humility—being willing to admit that you might be wrong—is what this book is primarily about. But Adam, the renowned Wharton psychology professor and bestselling author, takes the reader on a mind-opening journey with colorful stories and characters.

Think Like a Detective: A Kid's Guide to Critical Thinking , by David Pakman

The popular YouTuber and podcast host Pakman—normally known for talking politics —has written a terrific primer on critical thinking for children. The illustrated book presents critical thinking as a “superpower” that enables kids to unlock mysteries and dig for truth. (I also recommend Pakman’s second kids’ book called Think Like a Scientist .)

Rationality: What It Is, Why It Seems Scarce, Why It Matters , by Steven Pinker

The Harvard psychology professor Pinker tackles conspiracy theories head-on but also explores concepts involving risk/reward, probability and randomness, and correlation/causation. And if that strikes you as daunting, be assured that Pinker makes it lively and accessible.

How Minds Change: The Surprising Science of Belief, Opinion and Persuasion , by David McRaney

David is a science writer who hosts the popular podcast “You Are Not So Smart” (and his ideas are featured in A More Beautiful Question ). His well-written book looks at ways you can actually get through to people who see the world very differently than you (hint: bludgeoning them with facts definitely won’t work).

A Healthy Democracy's Best Hope: Building the Critical Thinking Habit , by M Neil Browne and Chelsea Kulhanek

Neil Browne, author of the seminal Asking the Right Questions: A Guide to Critical Thinking, has been a pioneer in presenting critical thinking as a question-based approach to making sense of the world around us. His newest book, co-authored with Chelsea Kulhanek, breaks down critical thinking into “11 explosive questions”—including the “priors question” (which challenges us to question assumptions), the “evidence question” (focusing on how to evaluate and weigh evidence), and the “humility question” (which reminds us that a critical thinker must be humble enough to consider the possibility of being wrong).

Warren Berger is a longtime journalist and author of A More Beautiful Question .

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• What Is Critical Thinking? | Definition & Examples

What Is Critical Thinking? | Definition & Examples

Published on 25 September 2022 by Eoghan Ryan .

Critical thinking is the ability to effectively analyse information and form a judgement.

To think critically, you must be aware of your own biases and assumptions when encountering information, and apply consistent standards when evaluating sources .

Critical thinking skills help you to:

• Identify credible sources
• Evaluate and respond to arguments
• Assess alternative viewpoints
• Test hypotheses against relevant criteria

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Table of contents

Why is critical thinking important, critical thinking examples, how to think critically, frequently asked questions.

Critical thinking is important for making judgements about sources of information and forming your own arguments. It emphasises a rational, objective, and self-aware approach that can help you to identify credible sources and strengthen your conclusions.

Critical thinking is important in all disciplines and throughout all stages of the research process . The types of evidence used in the sciences and in the humanities may differ, but critical thinking skills are relevant to both.

In an academic context, critical thinking can help you to determine whether a source:

• Is free from research bias
• Provides evidence to support its findings
• Considers alternative viewpoints

Outside of academia, critical thinking goes hand in hand with information literacy to help you form opinions rationally and engage independently and critically with popular media.

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Critical thinking can help you to identify reliable sources of information that you can cite in your research paper . It can also guide your own research methods and inform your own arguments.

Outside of academia, critical thinking can help you to be aware of both your own and others’ biases and assumptions.

Academic examples

However, when you compare the findings of the study with other current research, you determine that the results seem improbable. You analyse the paper again, consulting the sources it cites.

You notice that the research was funded by the pharmaceutical company that created the treatment. Because of this, you view its results skeptically and determine that more independent research is necessary to confirm or refute them. Example: Poor critical thinking in an academic context You’re researching a paper on the impact wireless technology has had on developing countries that previously did not have large-scale communications infrastructure. You read an article that seems to confirm your hypothesis: the impact is mainly positive. Rather than evaluating the research methodology, you accept the findings uncritically.

Nonacademic examples

However, you decide to compare this review article with consumer reviews on a different site. You find that these reviews are not as positive. Some customers have had problems installing the alarm, and some have noted that it activates for no apparent reason.

You revisit the original review article. You notice that the words ‘sponsored content’ appear in small print under the article title. Based on this, you conclude that the review is advertising and is therefore not an unbiased source. Example: Poor critical thinking in a nonacademic context You support a candidate in an upcoming election. You visit an online news site affiliated with their political party and read an article that criticizes their opponent. The article claims that the opponent is inexperienced in politics. You accept this without evidence, because it fits your preconceptions about the opponent.

There is no single way to think critically. How you engage with information will depend on the type of source you’re using and the information you need.

However, you can engage with sources in a systematic and critical way by asking certain questions when you encounter information. Like the CRAAP test , these questions focus on the currency , relevance , authority , accuracy , and purpose of a source of information.

When encountering information, ask:

• Who is the author? Are they an expert in their field?
• What do they say? Is their argument clear? Can you summarise it?
• When did they say this? Is the source current?
• Where is the information published? Is it an academic article? Is it a blog? A newspaper article?
• Why did the author publish it? What is their motivation?
• How do they make their argument? Is it backed up by evidence? Does it rely on opinion, speculation, or appeals to emotion ? Do they address alternative arguments?

Critical thinking also involves being aware of your own biases, not only those of others. When you make an argument or draw your own conclusions, you can ask similar questions about your own writing:

• Am I only considering evidence that supports my preconceptions?
• Is my argument expressed clearly and backed up with credible sources?
• Would I be convinced by this argument coming from someone else?

Critical thinking refers to the ability to evaluate information and to be aware of biases or assumptions, including your own.

Like information literacy , it involves evaluating arguments, identifying and solving problems in an objective and systematic way, and clearly communicating your ideas.

Critical thinking skills include the ability to:

You can assess information and arguments critically by asking certain questions about the source. You can use the CRAAP test , focusing on the currency , relevance , authority , accuracy , and purpose of a source of information.

Ask questions such as:

• Who is the author? Are they an expert?
• How do they make their argument? Is it backed up by evidence?

A credible source should pass the CRAAP test  and follow these guidelines:

• The information should be up to date and current.
• The author and publication should be a trusted authority on the subject you are researching.
• The sources the author cited should be easy to find, clear, and unbiased.
• For a web source, the URL and layout should signify that it is trustworthy.

Information literacy refers to a broad range of skills, including the ability to find, evaluate, and use sources of information effectively.

Being information literate means that you:

• Know how to find credible sources
• Use relevant sources to inform your research
• Understand what constitutes plagiarism
• Know how to cite your sources correctly

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Critical Thinking in the Online Classroom

But what exactly is critical thinking? A review of the literature shows that there is no agreed-upon definition. Indeed, “critical thinking” is a vague term, leading many authors to shape their definition based on the needs they identify in their field. Fortunately, many definitions overlap when it comes to essential characteristics of critical thinking. This article provides a succinct, universal definition of critical thinking, followed by two examples of how an instructor can encourage critical thinking in the delivery of an online classroom.

Defining Critical Thinking

Leading scholars on critical thinking Richard Paul and Linda Elder (n.d.) and Denise Halpern (2013) provide a helpful basis for developing a working definition of critical thinking. Incorporating elements from their work, we can define critical thinking as:

Fair-minded thinking that is self-guided and self-disciplined, is purposeful and goal oriented, and performs at the highest level of quality.

This definition encapsulates the idea that critical thinking isn’t something that someone just does ; it also entails one’s attitude . Let’s elaborate on the components that make up critical thinking:

• Accountability : Being willing to self-correct when needed
• Flexibility : Looking at new ideas, reconsidering old ideas in a new light, or being willing to suspend judgment until you obtain more information
• Self-guided and self-disciplined : The idea behind these two words is that no one can make you practice critical thinking. You can learn what critical thinking is and how to practice critical thinking skills; however, you and you alone are responsible for using these skills.
• Purposeful and goal oriented : Thinking is not an end unto itself. Why are you thinking through a particular issue? What do you seek to accomplish? Critical thinking must have a purpose behind it.
• High quality : Not every matter requires extensive, deep thinking; there are varying degrees of effort and time put into thinking through matters. However, the point behind “highest level of quality” is that one should seek to do his or her best in every situation and avoid lazy and fallacious thinking.

Critical thinking, then, is more than a collection of skills or how one thinks. To think critically entails one’s attitude, purpose, and effort. In short, it includes one’s approach to ideas and matters.

Encouraging Critical Thinking in the Online Classroom

If critical thinking includes one’s attitude, purpose, and effort, then how can you encourage critical thinking in your online course? The online format is fertile ground for fostering critical thinking because the instructor has various avenues within the LMS to engage students in activities that foster deeper, more substantive thinking. Below are two suggestions to this end.

Create Dialogue on the Discussion Boards

In addition to elaborating on the discussion question, you can engage students by addressing their responses. In doing so, you can ask various types of questions to get students to address problematic argumentation, elaborate on incomplete ideas, or think through the implications of their assertion(s). In other words, you can help students use their initial response as a springboard into deeper and meaningful thinking. Below are various kinds of questions that you can use to stretch students to think critically (Davis as cited in McDonald, 2016):

For more tips on how to develop effective discussion board questions, see our article “ Writing Discussion Forum Questions .”

Include Supplemental Resources

Critical thinking is a hot topic in education today, but oftentimes little is said about what critical thinking is. As an online facilitator, you can help foster within students a substantive approach to critical thinking through the use of discussion board questions and supplemental materials. Instilling critical thinking in your students will not only help them master your course objectives, but also give them skills they can apply far beyond the classroom.

Cothran, M. (2018, January 7). The critical thinking skills hoax. The Classical Teacher , Winter 2018. Retrieved from https://www.memoriapress.com/articles/the-critical-thinking-skills-hoax/

Halpern, D. (2013). Thought and knowledge: An introduction to critical thinking (5th ed.). New York: Psychology Press.

McDonald, D. (2016, October 12). Writing discussion forum questions. Retrieved from http://ctl.wiley.com/writing-discussion-forum-questions/

Paul, R., & Elder, L. (n.d.). The foundation for critical thinking. Retrieved from http://www.criticalthinking.org/

Additional Resources

If you want to read substantive work on what critical thinking is , Richard Paul and Linda Elder have developed a society devoted to understanding the nature of critical thinking and to using critical thinking skills in a wide array of settings. Check out their site: www.criticalthinking.org .

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How Can Critical Thinking Be Used to Assess the Credibility of Online Information?

Albie van zyl.

Department of Informatics, University of Pretoria, Pretoria, 0001 South Africa

Marita Turpin

Machdel matthee.

The prevalence of unverified information on the internet and the associated potential adverse effect on society led to the development of a number of models and theories to assess the credibility of online information. Existing research consists of two diverse approaches: the first consists of checklist approaches or normative guidelines on how to assess the information whereas the second provides descriptive models and theories of how users actually go about when assessing credibility. The above mentioned approaches consider aspects related to the presentation and content of the information. However, the reasoning in the content is not a concern that is covered in these approaches. Critical thinking is considered an increasingly important 21st century work place skill. This paper investigates the potential value of using critical thinking in assessing the credibility of online information. The paper commences with an overview of existing approaches for assessing the credibility of online information. It then argues that the presence of a well-developed argument in online information to be an indication of credibility. Critical thinking also helps to evaluate the credibility of evidence. These thinking skills can be developed through training. It is shown how a group of first year Information Systems students were able to more critically engage with the content of online news after a course on critical thinking. This paper contributes to the literature on the assessment of the credibility of online information.

Introduction

The internet has become indispensable as a source of information and news. Given the vast amount of information available as well as the large numbers of information sites, it has become increasingly difficult to judge the credibility of online information [ 1 ]. Metzger argues that in the past, traditional publishing houses used to act as gatekeepers of the information published. There was a cost barrier to printing and the print process allowed for quality control. In the digital age, anyone can be an author of online content. Digital information and content can be published anonymously, and easily plagiarized and altered [ 1 , 2 ]. Online news platforms are in a continual race against time to be the first to publish online, and in the process they sacrifice quality control. In the process, the gatekeeping function of evaluating the credibility of online information has shifted to the individual users.

To date, scholars in information literacy have developed checklists to assist users in assessing the credibility of online information, as well as various theories and models to describe how users evaluate information in practice [ 2 – 5 ]. These models highlight aspects such as the influence of the subjectivity of the user in evaluating content, the process of evaluation as well as the cognitive heuristics that users typically apply during evaluation. The models also recognize that in the era of social computing and social media, evaluation has a strong social component [ 6 ].

In an overview of studies on the assessment of the credibility of online information, it was found that neither the established normative guidelines for evaluating credibility, nor the descriptive models for evaluating credibility consider the quality of reasoning and argumentation contained in the information that is evaluated. That is strange, since critical thinking is generally regarded as an important information literacy skill, and in addition it is viewed as an important 21 st century workplace skill [ 7 , 8 ].

In this paper, we present a case for the use of critical thinking as a means to assess the quality and credibility of online content. We suggest how critical thinking could be used to enhance current credibility assessment practices. The known processes have in common with critical thinking the fact that they are all concerned with the credibility of evidence that is presented to substantiate the findings of an online article. Whereas credibility models mainly focus on presentation and content, critical thinking extends the evaluation of content by evaluating the quality of the argument presented. Admittedly, many fake (and other) news stories contain limited if any arguments to evaluate. While the absence of an argument is not enough to discredit an online article, its presence can be used as a quality indicator. The presence of a weak argument will reduce the perceived credibility of the claim or finding of an article, while a strong argument will enhance its credibility.

This paper commences with a short overview of existing guidelines and descriptive models for evaluating the credibility of online information. The common themes among these models are summarized. Next, the paper introduces the building blocks of critical thinking and proceeds to indicate how critical thinking is used for argument evaluation. A means to assess the credibility of online information is proposed that uses critical thinking in a way that recognizes and builds on previous work related to credibility assessment.

Existing Research on Assessing the Credibility of Online Information

Credibility refers to the believability of information [ 4 ]. Credibility is regarded to be subjective: it is not an objective attribute of an information source, but the subjective perception of believability by the information receiver [ 4 , 9 ]. As such, two different information receivers can have different assessments of the credibility of the same piece of information.

Research on assessing the credibility of online information can be categorized into research on normative guidelines (in other words, what should people be looking at when they assess credibility) and research related to descriptive models or theories (how people are assessing credibility in practice).

A Checklist for Information Credibility Assessment

The normative approach to the assessment of information credibility is promoted by the proponents of digital literacy, who aim to assist internet users in developing the skills required for evaluating online information. Their assumption is that online information can be evaluated in the same manner as information found elsewhere [ 1 ]. A checklist approach is usually followed, where the list covers the following five components: accuracy, authority, objectivity, currency, and coverage or scope [ 1 ]. Accuracy refers to the degree that the content is free from errors and whether the information can be verified elsewhere. It is an indication of the reliability of the information on the website. Authority refers to the author of the website, and whether the website provides contact details of the author and the organisation. It is also concerned with whether the website is recommended or endorsed by a trusted source. Objectivity considers whether the content is opinion or fact, and whether there is commercial interest, indicated for example by a sponsored link. Currency refers to the frequency of updates, and whether the date is visible. Coverage refers to the depth and comprehensiveness of the information [ 1 ]. In a checklist approach, a user is given a list of questions of things to look out for. For example, in terms of currency, the user has to look for evidence of when the page was last updated.

In a series of studies conducted by Metzger and her colleagues [ 1 ], it was found that even when supplied with a checklist, users rarely used it as intended. Currency, comprehensiveness and objectivity were checked occasionally, whilst checking an author’s credentials, was the least preferred by users. This correlates with findings by Eysenbach and Köhler [ 10 ] who indicate that the users in their study, did not search for the sources behind their website information, or how the information was compiled. This lack of thoroughness is ascribed to the users’ lack of willingness to expend cognitive effort [ 6 ]. The apparent attempt by users to minimise cognitive effort has given rise to studies on how users apply cognitive heuristics as well as other means to assess credibility more quickly and with less effort. This research led to the development of a number of descriptive models and theories on how users assess credibility in practice.

Descriptive Models and Theories Related to Information Credibility Assessment

The use of cognitive heuristics..

A number of studies indicate that internet users avoid laborious methods of information evaluation, and that they prefer to use more superficial cues, such as using the look and feel of a website as a proxy for credibility rather than analyzing the content [ 5 , 6 , 11 ]. When evaluating credibility, people tend to apply cognitive heuristics, which are mental short cuts or rules of thumb. Based on their previous experience people respond to cues and act on these subconsciously, without the need to spend mental effort [ 6 , 12 , 13 ]. Five heuristics are identified that users commonly apply to decide on the credibility of online content [ 6 ]. The reputation heuristic is applied when users recognize the source of the information as one they believe to be reputable, possibly because of brand familiarity or authority. The endorsement heuristic means that a source is believed to be credible if other people believe so too; either people they know or people that have given it a good rating. The consistency heuristic means that if similar information about something appears on multiple websites, the information is deemed to be credible. The expectancy violation heuristic is a strong negative heuristic. Information that is contrary to the user’s own beliefs is not deemed to be credible. Lastly, when using the persuasive intent heuristic , users assess whether there is an attempt to persuade them or sell something to them. In this case, the information is perceived to be not credible because there is a perceived ulterior motive or an attempt to manipulate the user.

The Prominence-Interpretation Theory.

The Prominence-Interpretation theory comprises two interlinked components that describe what happens when a user assesses the credibility of a website [ 14 ]. First, a user notices something (prominence), and then they interpret what they see (interpretation). If one of the two components are missing, there is no credibility assessment. A user will notice existing and new elements of a website and interpret the elements for credibility in an iterative fashion until being satisfied that a credibility assessment can be made. Conversely, the user may stop when they reach a constraint, such as running out of time [ 14 ]. A visual representation of the Prominence-Interpretation theory is provided in Fig.  1 .

Prominence-interpretation theory [ 14 ]

Prominence refers to the likelihood that certain elements will be noticed or perceived by the user. The user must first notice the element, to form a judgement of the credibility of the information. If the user does not notice the element, it does not play a role. Five factors are identified that influence prominence, namely: Involvement, topic, task, experience and individual differences. The most dominant influence is user involvement, referring to the user’s motivation and ability to engage with content. Topic refers to the type of website the user visits. The task is the reason why the user is visiting the websites. Experience refers to the experience of the user, in relation to the subject or topic of the website. Individual differences refer to the user’s learning style, literacy level or the user’s need for cognition. When a user’s involvement is high, and the user’s experience is of expert status, the user will cognitively notice more elements [ 14 ].

Interpretation refers to the user’s judgement of the element under review. For example, a broken link on a website will be interpreted as bad and lead to a lower credibility assessment of the website. Interpretation of elements is affected by a user’s assumptions, skills, knowledge and context.

Consolidation.

When comparing the research on the use of heuristics [ 6 ] with the Prominence-Interpretation theory [ 14 ], one can see that the use of heuristics fits well into the “interpretation” component of Prominence-Interpretation theory.

A Web Credibility Framework.

Fogg’s web credibility framework [ 15 ] contains the categories of operator , content and design . Operator refers to the source of the website, the person who runs and maintains the website. A user makes a credibility judgement based on the person or organisation operating the website. Content refers to what the site provides in terms of content and functionality. Of importance is the currency, accuracy and relevance of the content and the endorsements of a respected outside organisation. Design refers to the structure and layout of the website. Design has four elements namely information design (structure of the information), technical design (function of the site on a technical level, and search function), aesthetic design (looks, feel and professionality of the design) and interaction design (user experience, user interaction and navigation) [ 15 ].

The web credibility framework was extended by Choi and Stvilia [ 3 ] who divided each of the three categories (operator, content and design) into the two dimensions of trustworthiness and expertise, thereby forming what is called the Measures of Web Credibility Assessment Framework.

When consolidating the web credibility framework [ 15 ] and its extension [ 3 ] with the work on credibility assessment presented in the prior sections, one can say that the web credibility frameworks contribute to prominence as well as the interpretation . The web design contributes to the prominence or noticeability of the information. Further, the level of professionality of the design can be interpreted by means of a heuristic such as the reputation heuristic. The website operator and content, when noticed, get interpreted by means of evaluation heuristics. Hence, the work presented in 2.2.1 – 2.2.3 can be reconciled into different aspects of online information that, when noticed, get interpreted by means of heuristics.

Iterative Models on the Evaluation of Online Information.

According to the Prominence-Interpretation theory [ 14 ] the interpretation of information occurs in an iterative fashion until a credibility assessment can be made. Two other models also recognize the iterative nature of credibility assessment. These are the cognitive authority model [ 2 ] and Wathen and Burkell’s model [ 16 ].

With the cognitive authority model, the information seeker iteratively assesses the authority and credibility of online content by considering the author, document, institution and affiliations [ 2 ]. These are integrated into a credibility judgement. The model is similar to the checklist [ 1 ], but proposes that users employ the technology available to them to make the judgement. Like the checklist, the cognitive authority model is normative.

Wathen and Burkell [ 16 ] also propose an iterative way of assessment. According to their research users first do a surface credibility check based on the appearance and presentation of the website. Secondly, the user will look for message credibility by assessing the source and the content of the message. Lastly, the content itself is evaluated. During this final stage, sense-making of the content occurs, depending on factors such as the user’s previous level of knowledge on the topic. If, at any stage, the user becomes aware of a reason to doubt the credibility of the information, the iterative process is stopped. Wathen and Burkell’s model [ 16 ] is normative but also incorporates descriptive research on information evaluation.

A Synthesised Summary of Existing Work on the Credibility Assessment Process

To synthesise the joint findings from previous work on credibility assessment of online information:

• Credibility cues need to be noticed before they are processed [ 14 ].
• The evaluation process is iterative and moves from surface level checks (such as look and feel of a website) through to engagement with the content [ 14 , 16 ].
• From the onset of the evaluation process, cognitive or judgmental heuristics are applied to assess credibility. This is especially true during the interpretation phase, when a user evaluates the content itself [ 1 , 4 – 6 ]. Judgmental heuristics are used in order to reduce cognitive effort as the user is inundated with information.
• The evaluation process takes part in a social context and some of the evaluation cues are socially generated, such as number of website visitors, user recommendations or social rankings [ 6 ].

In the section that follows, the principles of critical thinking will be introduced. This is in order to assess how critical thinking might be used to evaluate online content in the light of what is already known about credibility evaluation.

Critical Thinking

The Foundation of Critical Thinking considers critical thinking as “that mode of thinking - about any subject, content, or problem - in which the thinker improves the quality of his or her thinking by skillfully analyzing, assessing, and reconstructing it” [ 17 ]. Some authors consider it an indispensable skill in problem solving. Halpern suggests a taxonomy of critical thinking skills covering a broad range of skills as (1) verbal reasoning skills, (2) argument analysis skills, (3) skills in thinking as hypothesis testing, (4) dealing with likelihood and uncertainties and (5) decision making and problem solving skills [ 18 ]. The aspect of critical thinking of interest in this paper, relates to the analysis of arguments. A useful definition for critical thinking is therefore the one suggested by Tiruneh and his co-authors [ 19 ]: critical thinking is the ability to analyse and evaluate arguments according to their soundness and credibility, respond to arguments and reach conclusions through deduction from given information [ 19 ]. Booth et al. [ 20 ], basing their work on ideas of Toulmin et al. [ 21 ], consider a basic argument to consist of a claim (or conclusion), backed by reasons which is supported by evidence. An argument is stronger if it acknowledges and responds to other views and if necessary, shows how a reason is relevant to a claim by drawing on a general principle (which is referred to as a warrant).

The following argument, adopted from [ 20 : 112] illustrates these components: “TV violence can have harmful psychological effects on children” (CLAIM), “because their constant exposure to violent images makes them unable to distinguish fantasy from reality” (REASON). “Smith (1997) found that children ages 5–7 who watched more than 3 h of violent television a day were 25% more likely to say that what they saw on television was ‘really happening’” (EVIDENCE). “Of course, some children who watch more violent entertainment might already be attracted to violence” (ACKNOWLEDGEMENT). “But Jones (1999) found that children with no predisposition to violence were as attracted to violent images as those with a violent history” (RESPONSE).

Booth and his co-authors [ 20 : 114] use the following argument to illustrate the use of a warrant in an argument: “We are facing significantly higher health care costs in Europe and North America (CLAIM) because global warming is moving the line of extended hard freezes steadily northward.” (REASON). In this case the relevance of the reason to the claim should be stated by a general principle: “When an area has fewer hard freezes, it must pay more to combat new diseases carried by subtropical insects no longer killed by those freezes” (WARRANT).

Of course, good arguments need more than one reason in support of conclusions and complex arguments contains sub-arguments. However the main components remain the same. Figure  2 summarizes the main components of a basic argument.

The core components of an argument [ 20 : 116]

Critical thinking entails the identification of the core components in an argument (analysis) in order to judge its credibility, quality and to formulate a response to it. According to Butterworth and Thwaites [ 7 ], a good quality argument is one where the reasons are true or justified and where the conclusion follows from the reasons. By using these criteria in the evaluation of arguments, classical fallacies such as the post hoc fallacy or circular reasoning can be identified. In addition, the evaluation of an argument entails asking questions and finding counter examples. A good quality argument will pre-empt objections or counter examples and respond to it. Butterworth and Thwaites [ 7 ] consider a credible argument as one which is plausible/believable (acknowledging that some highly improbable claims can be true), and having a trusted source. The credibility is enhanced if the claim is corroborated by different sources with different kinds of evidence.

The Use of Critical Thinking in the Context of Existing Credibility Assessment Models

It is suggested that critical thinking is included in the credibility assessment process, as follows. With reference to the Prominence-Interpretation theory [ 14 ], critical thinking can be applied during the interpretation phase. It can be used to assess the quality of evidence as well as evaluate the argument itself. It will only be used during a later stage in the iterative process of credibility assessment, possibly in the third phase of Wathen an Burkell’s iterative model [ 16 ].

Discussion: Potential Challenges to Using Critical Thinking to Assess the Credibility of Online Information

When considering the use of critical thinking to evaluate the credibility of online information, some challenges are apparent.

First, as indicated earlier, it is known that users, who are flooded with information, are applying as a coping mechanism the use of judgmental heuristics to reduce cognitive effort. Therefore, they prefer to use cues that will give them immediate reason to believe or not believe the information presented to them. Argument evaluation is an exercise that requires cognitive effort, especially when a complex claim is presented. Therefore, users will not go to the effort of thoroughly evaluating an argument if they can help it, unless there is high motivation to do so, for example when university level students are looking for material to support the arguments in their essays.

A second challenge to the use of critical thinking in this context is that online news or other online content does not always contain an argument. A piece of news on social media may just consist of evidence. In that case, critical thinking would require the evaluation of the credibility of the evidence.

A third possible challenge is that in an effort to mislead, the author of fake news may present a credible looking argument on the basis of fake evidence that cannot readily be verified. Hence, while good argumentation is often associated with good quality content, this may not always be the case. However, the cognitive effort of trying to second-guess the veracity of a well presented argument is so high that this is not a feasible task in everyday credibility assessment situations.

Addressing the Challenges

The above mentioned challenges could be addressed as follows.

The challenge of the cognitive effort of critical thinking may be improved by means of training. As motivated earlier in the paper, critical thinking forms part of information literacy and is an important 21st century user skill. Training and regular exercise in argument evaluation will make it become an easier habit, so that it can be more easily applied. A number of universities have compulsory first year information literacy courses, and this is where critical thinking can be introduced. The authors are involved in the teaching of critical thinking and problem solving to IS first year students. A study with a pre- and post- assessment exercise to determine the effect of the course, was done during the first half of 2019. A total of 154 students participated in the pre-assessment evaluation and 166 students in the post-assessment evaluation. The objective of the course was not to train students to identify fake news but to analyse and evaluate arguments and to cultivate a critical attitude towards reading and interpreting texts.

Findings from a Course on Critical Thinking.

Pre - assessment: During the pre-assessment, students were asked several questions to test their critical thinking skills and one question to determine the credibility of a piece of information found online. The information presented to them [ 22 ] was part of fake news and presented an argument against the use of prison inmates to provide laughter in CBS sitcoms. In the pre-assessment only 16% of students could identify it as fake news. Students who identified it as fake news, applied most of the cognitive heuristics listed in Sect.  2.2 . For example, a few students knew that The Onion is a website known for its satire articles (reputation heuristics). A handful of students applied the expectancy violation heuristics (“It just doesn’t make sense to me honestly”; “In today’s   day and age, such practice would never be accepted seeing as people get offended by even the most futile things”; “In today’s age, laughter can be produced on computers or a group of laughs taken once and then played back whenever the producers feel”). Consistency heuristics were also used (“ This is my first time hearing about it ”). Quite a number of students pointed out the lack of credible evidence.

Post - assessment:

In the post-assessment questions were asked to assess critical thinking skills in general and the last question focused on fake news. Two different pieces of information were provided, one fake news and the other not (see Table  1 ).

Table 1.

Article 1 and Article 2

Both articles contained far-fetched claims. Article 1 [ 23 ] is an argument containing unsubstantiated claims, sweeping statements and emotional language. Article 2 [ 24 ] was sourced from a ‘strange but true’ SkyNews site. Article 2 is a report based on claims backed by credible evidence. Students were asked to determine which one is fake news and to provide an argument for their choice. The results are given in Table  2 .

Table 2.

Responses on question to identify articles as fake news

Students who correctly identified Article 1 as fake news (56% of students), typically mentioned the relative obscurity of the website and the absence of names of experts ( “there is said that experts were used in the article but none of the so called “experts” names or institutions were called to show the research” ). In other words, they applied the reputation heuristic. The following student applied the expectancy violation heuristic to (incorrectly) identify Article 1 as real news: (“ Article 1 can be seen as real news because the facts are not absurd”). What was clearly noticeable was that in their assessment, most students used the critical thinking skills taught during the semester: they pointed out that the claims are not supported by evidence (“ they state that there are parents who burned?? the film but no numbers are provided it could be 2 out of 1000 but nothing is stated to prove this reason” ). They further mentioned the subjective nature of the article (“ The use of adjectives such as “arrogant”, “disrespectful”, “envious” makes the article sound extremely bia s ed” ) as well as harsh language (“ The article is also very opinionated and the language used is quite harsh” ). They also think the reasoning to be faulty (“ And the argument is unstructured – “the “reasoning” doesn’t lead up to a suitable conclusion .”)

Students who incorrectly identified Article 2 as fake news (56% of students) in general used the expectancy violation heuristic. They could not imagine sheep to be school pupils. ( “Although article 2 comes from a reliable source the facts are absurd. [However] Article 1 can be seen as real news because the facts are not absurd” ).

Discussion.

Article 1 is an argument whereas Article 2 a report. This explains why students were able to use critical thinking skills to evaluate article 1. In article 2, where no clear argument was present, critical thinking could only be applied to evaluate the evidence. Students found the evidence to be specific and traceable which contributed to its credibility. Only 36% of students were able to classify both articles correctly. However, the fact that only 8% said that neither articles were fake news, was encouraging, compared to the pre-assessment result where 84% of students were not able to recognize the supplied article as fake news. The post-assessment results indicate that most students had developed a critical attitude towards the supplied texts.

Recommendations on Combining Critical Thinking and Cognitive Heuristics.

The use of critical thinking skills in identifying fake news can be complemented by applying the consistency heuristic [ 6 ] to seek for other online sources that carry similar evidence.

Lastly, since the assessment of credibility of online information has been found to be a socially interactive activity [ 6 ], the endorsement heuristic could be used to inquire on a social platform whether information is credible. For example, a hoax website can be visited to see if the information has been exposed by other users as a hoax.

This paper considered the work that has been done to date on the assessment of the credibility of online information. A concise overview was presented of some of the major contributions in this domain. These contributions were synthesized into a list of common attributes that represent the key characteristics of credibility assessment models. Following this, the elements of critical thinking was introduced. Suggestions were made as to how critical thinking could be used for credibility assessment. The challenges related to the use of critical thinking in practice were also considered, and suggestions were made to overcome these challenges. The outcomes of the effect of the teaching of critical thinking skills on IS students’ ability to identify fake news, were discussed. Preliminary findings show that where fake news are presented as arguments, students use their skills of analysis and evaluation of arguments to identify fake news. Where fake news are reports, students look for quality evidence.

This paper contributes to the literature on the assessment of the credibility of online information. It argues that, and suggests how, the important 21st century skill of critical thinking can be applied to assess the credibility of online information. In doing so, this paper makes a contribution in terms of the responsible design, implementation and use of current day information and communications technology.

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Supplement to Critical Thinking

How can one assess, for purposes of instruction or research, the degree to which a person possesses the dispositions, skills and knowledge of a critical thinker?

In psychometrics, assessment instruments are judged according to their validity and reliability.

Roughly speaking, an instrument is valid if it measures accurately what it purports to measure, given standard conditions. More precisely, the degree of validity is “the degree to which evidence and theory support the interpretations of test scores for proposed uses of tests” (American Educational Research Association 2014: 11). In other words, a test is not valid or invalid in itself. Rather, validity is a property of an interpretation of a given score on a given test for a specified use. Determining the degree of validity of such an interpretation requires collection and integration of the relevant evidence, which may be based on test content, test takers’ response processes, a test’s internal structure, relationship of test scores to other variables, and consequences of the interpretation (American Educational Research Association 2014: 13–21). Criterion-related evidence consists of correlations between scores on the test and performance on another test of the same construct; its weight depends on how well supported is the assumption that the other test can be used as a criterion. Content-related evidence is evidence that the test covers the full range of abilities that it claims to test. Construct-related evidence is evidence that a correct answer reflects good performance of the kind being measured and an incorrect answer reflects poor performance.

An instrument is reliable if it consistently produces the same result, whether across different forms of the same test (parallel-forms reliability), across different items (internal consistency), across different administrations to the same person (test-retest reliability), or across ratings of the same answer by different people (inter-rater reliability). Internal consistency should be expected only if the instrument purports to measure a single undifferentiated construct, and thus should not be expected of a test that measures a suite of critical thinking dispositions or critical thinking abilities, assuming that some people are better in some of the respects measured than in others (for example, very willing to inquire but rather closed-minded). Otherwise, reliability is a necessary but not a sufficient condition of validity; a standard example of a reliable instrument that is not valid is a bathroom scale that consistently under-reports a person’s weight.

Assessing dispositions is difficult if one uses a multiple-choice format with known adverse consequences of a low score. It is pretty easy to tell what answer to the question “How open-minded are you?” will get the highest score and to give that answer, even if one knows that the answer is incorrect. If an item probes less directly for a critical thinking disposition, for example by asking how often the test taker pays close attention to views with which the test taker disagrees, the answer may differ from reality because of self-deception or simple lack of awareness of one’s personal thinking style, and its interpretation is problematic, even if factor analysis enables one to identify a distinct factor measured by a group of questions that includes this one (Ennis 1996). Nevertheless, Facione, Sánchez, and Facione (1994) used this approach to develop the California Critical Thinking Dispositions Inventory (CCTDI). They began with 225 statements expressive of a disposition towards or away from critical thinking (using the long list of dispositions in Facione 1990a), validated the statements with talk-aloud and conversational strategies in focus groups to determine whether people in the target population understood the items in the way intended, administered a pilot version of the test with 150 items, and eliminated items that failed to discriminate among test takers or were inversely correlated with overall results or added little refinement to overall scores (Facione 2000). They used item analysis and factor analysis to group the measured dispositions into seven broad constructs: open-mindedness, analyticity, cognitive maturity, truth-seeking, systematicity, inquisitiveness, and self-confidence (Facione, Sánchez, and Facione 1994). The resulting test consists of 75 agree-disagree statements and takes 20 minutes to administer. A repeated disturbing finding is that North American students taking the test tend to score low on the truth-seeking sub-scale (on which a low score results from agreeing to such statements as the following: “To get people to agree with me I would give any reason that worked”. “Everyone always argues from their own self-interest, including me”. “If there are four reasons in favor and one against, I’ll go with the four”.) Development of the CCTDI made it possible to test whether good critical thinking abilities and good critical thinking dispositions go together, in which case it might be enough to teach one without the other. Facione (2000) reports that administration of the CCTDI and the California Critical Thinking Skills Test (CCTST) to almost 8,000 post-secondary students in the United States revealed a statistically significant but weak correlation between total scores on the two tests, and also between paired sub-scores from the two tests. The implication is that both abilities and dispositions need to be taught, that one cannot expect improvement in one to bring with it improvement in the other.

A more direct way of assessing critical thinking dispositions would be to see what people do when put in a situation where the dispositions would reveal themselves. Ennis (1996) reports promising initial work with guided open-ended opportunities to give evidence of dispositions, but no standardized test seems to have emerged from this work. There are however standardized aspect-specific tests of critical thinking dispositions. The Critical Problem Solving Scale (Berman et al. 2001: 518) takes as a measure of the disposition to suspend judgment the number of distinct good aspects attributed to an option judged to be the worst among those generated by the test taker. Stanovich, West and Toplak (2011: 800–810) list tests developed by cognitive psychologists of the following dispositions: resistance to miserly information processing, resistance to myside thinking, absence of irrelevant context effects in decision-making, actively open-minded thinking, valuing reason and truth, tendency to seek information, objective reasoning style, tendency to seek consistency, sense of self-efficacy, prudent discounting of the future, self-control skills, and emotional regulation.

It is easier to measure critical thinking skills or abilities than to measure dispositions. The following eight currently available standardized tests purport to measure them: the Watson-Glaser Critical Thinking Appraisal (Watson & Glaser 1980a, 1980b, 1994), the Cornell Critical Thinking Tests Level X and Level Z (Ennis & Millman 1971; Ennis, Millman, & Tomko 1985, 2005), the Ennis-Weir Critical Thinking Essay Test (Ennis & Weir 1985), the California Critical Thinking Skills Test (Facione 1990b, 1992), the Halpern Critical Thinking Assessment (Halpern 2016), the Critical Thinking Assessment Test (Center for Assessment & Improvement of Learning 2017), the Collegiate Learning Assessment (Council for Aid to Education 2017), the HEIghten Critical Thinking Assessment (https://territorium.com/heighten/), and a suite of critical thinking assessments for different groups and purposes offered by Insight Assessment (https://www.insightassessment.com/products). The Critical Thinking Assessment Test (CAT) is unique among them in being designed for use by college faculty to help them improve their development of students’ critical thinking skills (Haynes et al. 2015; Haynes & Stein 2021). Also, for some years the United Kingdom body OCR (Oxford Cambridge and RSA Examinations) awarded AS and A Level certificates in critical thinking on the basis of an examination (OCR 2011). Many of these standardized tests have received scholarly evaluations at the hands of, among others, Ennis (1958), McPeck (1981), Norris and Ennis (1989), Fisher and Scriven (1997), Possin (2008, 2013a, 2013b, 2013c, 2014, 2020) and Hatcher and Possin (2021). Their evaluations provide a useful set of criteria that such tests ideally should meet, as does the description by Ennis (1984) of problems in testing for competence in critical thinking: the soundness of multiple-choice items, the clarity and soundness of instructions to test takers, the information and mental processing used in selecting an answer to a multiple-choice item, the role of background beliefs and ideological commitments in selecting an answer to a multiple-choice item, the tenability of a test’s underlying conception of critical thinking and its component abilities, the set of abilities that the test manual claims are covered by the test, the extent to which the test actually covers these abilities, the appropriateness of the weighting given to various abilities in the scoring system, the accuracy and intellectual honesty of the test manual, the interest of the test to the target population of test takers, the scope for guessing, the scope for choosing a keyed answer by being test-wise, precautions against cheating in the administration of the test, clarity and soundness of materials for training essay graders, inter-rater reliability in grading essays, and clarity and soundness of advance guidance to test takers on what is required in an essay. Rear (2019) has challenged the use of standardized tests of critical thinking as a way to measure educational outcomes, on the grounds that  they (1) fail to take into account disputes about conceptions of critical thinking, (2) are not completely valid or reliable, and (3) fail to evaluate skills used in real academic tasks. He proposes instead assessments based on discipline-specific content.

There are also aspect-specific standardized tests of critical thinking abilities. Stanovich, West and Toplak (2011: 800–810) list tests of probabilistic reasoning, insights into qualitative decision theory, knowledge of scientific reasoning, knowledge of rules of logical consistency and validity, and economic thinking. They also list instruments that probe for irrational thinking, such as superstitious thinking, belief in the superiority of intuition, over-reliance on folk wisdom and folk psychology, belief in “special” expertise, financial misconceptions, overestimation of one’s introspective powers, dysfunctional beliefs, and a notion of self that encourages egocentric processing. They regard these tests along with the previously mentioned tests of critical thinking dispositions as the building blocks for a comprehensive test of rationality, whose development (they write) may be logistically difficult and would require millions of dollars.

A superb example of assessment of an aspect of critical thinking ability is the Test on Appraising Observations (Norris & King 1983, 1985, 1990a, 1990b), which was designed for classroom administration to senior high school students. The test focuses entirely on the ability to appraise observation statements and in particular on the ability to determine in a specified context which of two statements there is more reason to believe. According to the test manual (Norris & King 1985, 1990b), a person’s score on the multiple-choice version of the test, which is the number of items that are answered correctly, can justifiably be given either a criterion-referenced or a norm-referenced interpretation.

On a criterion-referenced interpretation, those who do well on the test have a firm grasp of the principles for appraising observation statements, and those who do poorly have a weak grasp of them. This interpretation can be justified by the content of the test and the way it was developed, which incorporated a method of controlling for background beliefs articulated and defended by Norris (1985). Norris and King synthesized from judicial practice, psychological research and common-sense psychology 31 principles for appraising observation statements, in the form of empirical generalizations about tendencies, such as the principle that observation statements tend to be more believable than inferences based on them (Norris & King 1984). They constructed items in which exactly one of the 31 principles determined which of two statements was more believable. Using a carefully constructed protocol, they interviewed about 100 students who responded to these items in order to determine the thinking that led them to choose the answers they did (Norris & King 1984). In several iterations of the test, they adjusted items so that selection of the correct answer generally reflected good thinking and selection of an incorrect answer reflected poor thinking. Thus they have good evidence that good performance on the test is due to good thinking about observation statements and that poor performance is due to poor thinking about observation statements. Collectively, the 50 items on the final version of the test require application of 29 of the 31 principles for appraising observation statements, with 13 principles tested by one item, 12 by two items, three by three items, and one by four items. Thus there is comprehensive coverage of the principles for appraising observation statements. Fisher and Scriven (1997: 135–136) judge the items to be well worked and sound, with one exception. The test is clearly written at a grade 6 reading level, meaning that poor performance cannot be attributed to difficulties in reading comprehension by the intended adolescent test takers. The stories that frame the items are realistic, and are engaging enough to stimulate test takers’ interest. Thus the most plausible explanation of a given score on the test is that it reflects roughly the degree to which the test taker can apply principles for appraising observations in real situations. In other words, there is good justification of the proposed interpretation that those who do well on the test have a firm grasp of the principles for appraising observation statements and those who do poorly have a weak grasp of them.

To get norms for performance on the test, Norris and King arranged for seven groups of high school students in different types of communities and with different levels of academic ability to take the test. The test manual includes percentiles, means, and standard deviations for each of these seven groups. These norms allow teachers to compare the performance of their class on the test to that of a similar group of students.

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