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Cognitive Labs provides a "brain speed test" or reaction time test. The test is free and takes a minute.

Free: Uncommonly Difficult IQ Tests

Free very hard IQ Tests

Gigtest.com provides complete and accurate result of your intelligence quotient (IQ) test. The GIQTest correlated with an individual's full scale score on a clinically proctored IQ test.

For the very first time in psychometric testing history, Mind Media has teamed up with Central Test to introduce the Corporate I.Q. Test! The Internet's most reliable IQ test!

Einstein had an IQ over 160, what is your Intelligence Quotient? Just how smart do you think you are? Only the Corporate I.Q. test knows for sure! Finally, a new serious approach to IQ testing that is informative and reliable.

See how your intelligence rates among more than 500.000 websurfers who have taken this test. So take the most relevant and reliable IQ test ever and get your intelligence quotient!

Take a free professionally certified IQ test is based on the most current and accurate psychological research available.

This thought-provoking test was created by a staff of PhDs collaborating with experts in their respective fields. Led by Dr. Jennifer Bruning Brown, a team of psychologists from Harvard, Yale, Duke, Northeastern, Washington University in St. Louis, University at Albany, SUNY and The University of Kansas, have produced the highest quality and most scientific tests available on the Internet, meeting standards on par with the academic world.

The test provides insight into your intelligence based on experience with clinical patients as well as the developers continued pursuit of knowledge of human nature, including the theoretical frameworks and empirical validation. Plus its a lot of fun!

Do you wish you understood yourself better? Have you ever wondered if you've chosen the right career, the right mate, the right lifestyle? Are you interested in the meanings of your secret thoughts and dreams? If questions like that intrigue you, get Mind Prober 3.0

Mind Prober 3.0 can help you instantly understand your mind and the minds of others, the ones you work with, your friends, relatives, anyone.In simple and practical terms, you’ll gain insight into the inner workingsof your mind--and learn more than you ever imagined possible.

International High IQ Society Free Tests include an "ultimate" IQ test, a timed test, a "cultural fair" IQ test, a test of exceptional intelligence and a verbal IQ test. More are available with membership in the society.

This is the only test of its kind, an IQ test designed for children around eight years old!

You can have your child try this and other tests at Bright Education. Taking tests at Bright Education will help your child prepare for taking tests of all kinds.