Learn about IQ
Short, plain-English guides to what IQ scores mean and what they don't.
- What is IQ?Where the scale comes from and what 100 means.
- IQ score chartHow common each score is, from 70 to 145.
- What IQ is linked toSchool, work, income and health: how strong the links really are.
- The Flynn effectWhy scores rose for a century, and why some are now falling.
- Scores by countryAverage IQMaxx score of test takers in each country.
- How this test worksWhat the 25 puzzles measure and how your score is worked out.