Our test was designed for native English speakers who are at least 16 years old. If you do not speak English very well, your score will be lower than it would be if you took a test in your native language.

If you are under the age of 16, you'll get a more valid score on a test designed for children your age. Age is not factored into the scoring of our test, but it is an important factor in tests for those under 16. Adult IQ scores usually remain constant over a lifetime, but children's scores can sometimes change.