IQ scores
IQ percentile: what your score means
An IQ percentile compares you with a test's norm group. It does not count right answers. A score-to-percentile chart, the calculation, and why your percentile is a range.
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How IQ tests work
How IQ tests are built, timed, scored and normed, from matrix puzzles to item response theory.
המאמרים שלנו כתובים באנגלית.
How IQ tests work
What is abstract reasoning?
Abstract reasoning means finding the rule behind patterns you have not seen before. What it is, everyday and test examples, how it relates to fluid intelligence and IQ, and why the UCAT dropped its section.
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Intelligence research
EQ vs IQ: what is the difference?
IQ and emotional intelligence are measured in very different ways. What each score means, how much they overlap, what research says each predicts at school and work, and where the popular EQ numbers come from.
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Online and clinical tests
What is the WAIS IQ test?
The Wechsler Adult Intelligence Scale, now Pearson's WAIS-5 from 2024, is a one-to-one clinical IQ test. What changed from the WAIS-IV, what it costs, and why a free online WAIS quiz is not the real test.
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Online and clinical tests
What is the Stanford-Binet test?
The Stanford-Binet Intelligence Scales, Fifth Edition (Roid, 2003) is a one-to-one clinical IQ test with 10 subtests and five factors (PRO-ED). How it is given and scored, and why online quizzes differ.
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How IQ tests work
What does an IQ test measure?
A full IQ test such as the WAIS-5 (Pearson, 2024) samples five abilities and combines them into one score. Raven's matrix test uses a single type of item (APA task force, 1996).
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How IQ tests work
What are Raven's Progressive Matrices?
Raven's Progressive Matrices are nonverbal reasoning tests in which you pick the piece that completes a pattern. Scores are compared with an age-based norm group, and the test uses only one kind of puzzle.
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Online and clinical tests
Are IQ tests accurate?
Calculated from the WAIS-5's 0.97 reliability (2024), a clinical IQ score has a 95% range of about 5 points either side. Online tests vary, and most free quizzes publish no data.
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Intelligence research
What is fluid intelligence?
Fluid intelligence is the ability to reason and solve new problems without relying on what you already know (PNAS, 2008). Learn how it differs from crystallized intelligence and how it is measured.
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ראו איפה אתם עומדים
24 חידות, בערך 15 דקות, ולפני כן חימום קצר.