Critical Thinking Test: A Free 24-Question Quiz on Arguments and Evidence
A free, untimed quiz with 24 original questions on evaluating arguments, spotting unstated assumptions, and reading evidence carefully. Get an instant score, a three-category breakdown, and an optional PDF.
Reviewed by Michael Callans, MSW 
Critical Thinking Test is a free, confidential 24-question self-assessment, original reasoning quiz · Untimed · Not the Watson-Glaser. It takes about 6 minutes, runs entirely in your browser, and gives you a plain-language score across 4 interpretation bands plus an optional in-depth report. It is an educational screening, not a diagnosis.
What this critical thinking quiz actually measures
This is a short, original quiz for education and self-reflection. It samples three everyday critical thinking skills through 24 questions, and its score describes success on this quiz, not a certified critical thinking rating.
Three everyday reasoning skills
Eight questions each on evaluating arguments (what strengthens or weakens a claim), spotting unstated assumptions (what a claim quietly takes for granted), and reading evidence carefully (what a short finding does and does not support). These are common building blocks of careful thinking, not a full model of critical thinking as a construct.
Where you were strongest
Argument evaluation, Assumptions, and Evidence and inference are our own descriptive groupings, not a validated subscale structure from any published instrument. Counts show which kind of question you answered correctly on this attempt, and different item difficulty means a taller bar is not proof of a stronger underlying skill.
An honest, unranked estimate
Your number correct is placed into a broad band using fixed editorial cutoffs, not comparison with a reference population. This is a self-administered, untimed, unproctored quiz. It is not a percentile, a certified critical thinking score, or a substitute for an employer's own assessment process.
| Feature | Typical free quiz | Psychology.com |
|---|---|---|
| What the result means | A percentage or label may imply comparison with other test-takers | A broad estimated band on this quiz alone, with no population ranking |
| Evidence for the items | Source and validation may be unclear | 24 original items; no validation study or norms claimed |
| Relationship to employer tests | May imply a link to tools like the Watson-Glaser | Independent quiz, not affiliated with or equivalent to any employer assessment |
| Category breakdown | Domain labels may be presented as separate measured abilities | Our own unvalidated groupings, clearly labeled as such |
| Testing conditions | Timing and supervision may be unclear | Untimed and unproctored, with conditions left to the test-taker |
| Access | Some results sit behind signup or payment | Free instant results, no signup required |
How scoring works
Answers are scored 0–24 in total. Your result falls into one of 4 bands:
| Score | Band | What it suggests |
|---|---|---|
| 0–8 | Developing: several questions were difficult on this attempt | This range describes this quiz attempt, not a fixed level of reasoning ability. |
| 9–14 | Developing to moderate: a mixed result | Your answers show a mix of solved and missed questions across the three skills. |
| 15–20 | Moderate to strong: you solved a clear majority | You solved a clear majority of these questions on this attempt. |
| 21–24 | Strong: you solved nearly all or all of these questions | You solved nearly all or all of these questions. The quiz has too few very hard items to distinguish finer levels of skill at this end. |
Cognitive Biases: The Shortcuts Behind Weak Arguments
Most of the wrong answers on this quiz are wrong for a reason: they mimic a shortcut the mind actually reaches for. Confirmation bias pulls us toward evidence that fits what we already believe and away from evidence that doesn't. The availability heuristic makes a vivid, easily recalled example feel more common than it really is, which is why a single dramatic news story can outweigh a mountain of quiet statistics in how a decision feels. Anchoring lets an early number or claim, even an irrelevant one, quietly shape every estimate that follows it.
None of these patterns are a personal failing; they are well-documented features of ordinary human reasoning (Tversky and Kahneman, 1974), and they affect careful, intelligent people just as often as anyone else. What differs is whether someone has practiced noticing the shortcut before acting on it. Our Cognitive Distortions List (/tools/cognitive-distortions-list) names a related set of thinking traps, more focused on emotion and self-judgment than on arguments and evidence, and is a useful companion if you noticed your own thinking getting tangled during this quiz.
Is This the Watson-Glaser or Another Employer Test?
No. The Watson-Glaser Critical Thinking Appraisal is a proprietary, professionally developed and normed assessment that Pearson licenses to employers, most often in law, consulting, and finance hiring. It is typically timed, often proctored, and scored against a standardization sample with published norms. This page shares nothing with that instrument: our 24 questions are original, our scoring is a simple sum with fixed editorial bands, and we have no norms, reliability data, or validity evidence to offer.
If an employer or graduate program has told you that you need to take the Watson-Glaser or a similar assessment, they will direct you to the official testing process, and this quiz is not preparation material for it in any evidenced sense. What this page can offer is a low-stakes way to notice which of three everyday reasoning skills, evaluating arguments, spotting assumptions, or reading evidence, could use more of your attention day to day.
What to Do After This Quiz
If you want to practice adjacent skills, the Logical Reasoning Test (/tests/logical-reasoning) focuses more narrowly on deduction from stated premises, and the Aptitude Test (/tests/aptitude) samples a broader mix of verbal, numerical, and abstract reasoning tasks. Neither converts into this quiz's score or into an official critical thinking rating.
If you noticed that you second-guess your own conclusions long after you have enough information to decide, that is a different pattern from the reasoning skills this quiz measures, and our Overthinking Test (/tests/overthinking) looks at it directly. Careful thinking and chronic rumination can look similar from the inside but call for different responses.
Methodology & sources
This is an original educational quiz, not an administration or adaptation of any published critical thinking assessment, including the Watson-Glaser Critical Thinking Appraisal that many employers use in hiring for law, consulting, and graduate roles. The Watson-Glaser is a proprietary, professionally normed instrument administered under timed, often proctored conditions; we name it here only so readers understand what this page is not. Our 24 items are original short scenarios covering three skills: evaluating whether a new fact would strengthen or weaken an argument, identifying the unstated assumption an argument depends on, and judging what a small piece of evidence does and does not support. Each item has one correct answer worth 1 point and three plausible incorrect answers worth 0, with no penalty for guessing and no time bonus.
Argument evaluation has 8 items, Assumptions has 8, and Evidence and inference has 8. These are our own descriptive groupings for feedback purposes, not validated subscales from a published taxonomy, and their equal size does not imply equal difficulty. The total out of 24 places you into one of four fixed editorial bands: 0 to 8, 9 to 14, 15 to 20, and 21 to 24. These bands describe performance on this specific quiz, not a percentile rank, a hiring-relevant score, or a diagnosis of reasoning ability. We have no reliability data, standardization sample, or validity evidence for this questionnaire, and a single answer near a cutoff can shift the band label without a meaningful change in skill.
References
- Watson G, Glaser EM. Watson-Glaser Critical Thinking Appraisal. Pearson TalentLens. Publisher product page: talentlens.com/watson-glaser.html
- Ennis RH. A logical basis for measuring critical thinking skills. Educational Leadership. 1985;43(2):44-48.
- Halpern DF. Thought and Knowledge: An Introduction to Critical Thinking. 5th ed. New York: Psychology Press; 2014.
- Tversky A, Kahneman D. Judgment under uncertainty: Heuristics and biases. Science. 1974;185(4157):1124-1131. doi.org/10.1126/science.185.4157.1124
Cite this source
Psychology.com. (2026, September 23). Critical Thinking Test. Psychology.com. https://psychology.com/tests/critical-thinking
Critical Thinking Test FAQ
Is this the same as the Watson-Glaser test employers use?
No. The Watson-Glaser Critical Thinking Appraisal is a proprietary, professionally normed assessment that some employers use in hiring, particularly in law and consulting, administered under timed and often proctored conditions. This page is an independent, original quiz built for self-reflection. It is not affiliated with, equivalent to, or predictive of results on the Watson-Glaser or any other employer assessment. Do not use this result to prepare for or represent an official test score.
How is my score calculated?
Each of the 24 questions has one correct answer worth 1 point and three incorrect answers worth 0. Your total out of 24 places you into a broad editorial band. There is no time limit, no penalty for guessing, and no adjustment for education or background. This is a self-administered, untimed, unproctored, unnormed quiz score, not a percentile or a certified critical thinking rating.
What is critical thinking, really?
Researchers generally describe critical thinking as the deliberate, reasoned evaluation of claims, evidence, and arguments, including noticing assumptions and weighing alternative explanations (Ennis, 1985; Halpern, 2014). It draws on both skill and disposition, meaning the habit of actually using the skill when it matters, not just the ability to use it on a quiz. A 24-item quiz can sample a slice of the skill component; it cannot measure the disposition to apply it in real situations.
Why do smart, careful people still fall for weak arguments?
Kahneman and Tversky's research on heuristics and biases (1974) describes how people routinely rely on quick mental shortcuts that usually work but can produce predictable errors, especially under time pressure or when a claim confirms what we already believe. Being generally intelligent does not immunize anyone against these patterns; noticing them takes deliberate practice, which is part of why this quiz separates argument evaluation, assumptions, and evidence into distinct categories you can practice one at a time.
Can I improve my critical thinking, and does retaking this quiz help?
Deliberate practice with feedback, of the kind used in some university and workplace training, has research support for improving reasoning skills over time. Retaking this exact quiz mainly tests memory of these specific questions rather than a broader gain, since you may recall the scenarios or the correct pattern. Use the category breakdown to pick one skill, then practice it on new material, such as reading opinion columns and identifying the unstated assumption before reading further.
Should I use this result on a resume or in a job application?
No. This is an educational, unvalidated quiz with no norms or reliability data, and it carries no evidentiary weight for hiring, admissions, or any other formal decision about you or anyone else. If an employer specifically requires a Watson-Glaser or similar score, they will direct you to their own approved testing process.
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