Knowledge base

Articles about the tests on this site and the numbers they produce: what a score can tell you, where it stops, and what a real test does differently.

Is an online IQ test accurate? What the number does and does not tell you
An online IQ test gives you a number, but rarely an IQ. A real IQ test is normed on a large group, taken under supervision, and has a mean of 100 with a standard deviation of 15. A free test on a website usually lacks that norm group, so a score of 128 says something about the site and little about you.

Knowledge base: tests, scores and what they can tell you | Skillido