IQ Test — Accurate Intelligence Assessment

This test uses scientifically validated question types (progressive matrices, spatial reasoning, digit span) and Item Response Theory scoring. It is non-verbal: vocabulary, verbal comprehension and processing speed are not measured as separate indices, so the result reflects reasoning, spatial ability, working memory and number sense rather than a full WAIS profile. It is not a substitute for a professionally administered test like the WAIS-IV.

The test uses adaptive difficulty and IRT scoring to maximize accuracy. The 95% confidence interval shown with your results indicates the precision of your score. For most test-takers the 95% interval spans about ±9–10 IQ points. Very high results are measured less finely: the bank still has few items hard enough for scores above about 135.

IQ scores follow a normal distribution with a mean of 100 and standard deviation of 15. A score of 100 means average intelligence. About 68% of people score between 85 and 115, and about 95% score between 70 and 130.

Yes. All questions use abstract visual patterns, shapes, and numbers — no language comprehension, vocabulary, or cultural knowledge is required. This design is inspired by the Cattell Culture Fair Intelligence Test.

The full test takes approximately 15–20 minutes to complete, with about 60 tasks across 6 sections. Short breaks are offered between sections.

Yes, you can retake the test as many times as you like. Your results history is saved locally on your device. Note that practice effects may slightly inflate scores on repeated attempts.

IQ is a deviation from the average for your own age, so the same performance means different things at 12 and at 45. If you give your age, the score is computed against your age group; if you do not, it is computed against everyone who took the test. We are refining the age norms on our own runs, so in some groups the confidence interval is still wider.