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Cognitive Reflection Test (CRT-7)
A 7-item test that measures your tendency to override an intuitive but incorrect answer and engage in further reflection. Includes the classic CRT and CRT-2 items.
Reasoning practice · Source evidence only
Puzzles from published cognitive-reflection research. Familiarity and practice affect the result. This site has no population comparison or validated intelligence score.
How this result is made →What you will learn
Which of seven reasoning puzzles you solved correctly. Prior familiarity can influence the result; it does not rank your intelligence.
Private by default. Answers never leave this device. Scoring runs entirely in your browser. Built for self-reflection, not grades or diagnosis.
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After a test update or wording change, a fresh start keeps your answers consistent.