These are some of the sites I visited in preparing and updating the Pearson Intelligence Battery™. Some were particularly useful and others had noteworthy content that interested me and may interest you. Please remember that I am not affiliated with any of these organizations and exercise no control over them.  Those carrying the "official reference" designation are the final authority on certain questions in this test. Webmasters: Please see our link exchange policy popup.

The definitive math site on the Web, with hundreds of articles about all aspects of mathematics. (Official reference.)

This online version of the book by the same name is about 75 times larger and has some 80000 sequences that can be identified by entering just a few terms from anywhere in the sequence. (Official reference.)

The infamous Monte Hall problem analyzed to perfection, with references to Marilyn vos Savant's Parade article (September, 1991) that produced 10,000 letters, most condemning her mathematical illiteracy, when, in fact, she had it right all along. (Official reference.)

Online versions of Harvard Classics, Gray's Anatomy, Bartlett's Familiar Quotations, Strunk's Elements of Style and others. (Official reference.)

The 15th edition of the indispensable reference for all who work with words. (Official reference.)

Sanford-Brown College in Hazelwood, MO

Sanford-Brown College programs are designed to instill the specific skills you will need to get started in your chosen career.

Although intended to teach English as a second language, this site contains many helpful resources for anyone whose knowledge of the language has grown rusty.

Although Mensa claims it's not an IQ test, the Workout contains questions identical to those on IQ tests and therefore can be gamed through bypasses. Try it!

We provide 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.

Check out our range of PhD certified IQ tests. We also have loads of other fun tests that you would love.

The No. 1 free encyclopedia on the Web has lots to say about IQ tests and testing.

Improve Your IQ

Discussions of ways to increase your IQ and improve your memory, concentration and intelligence. This site offers insightful perspectives on genius, learning, pattern recognition, and related aspects of mental development. Highly recommended.

Develops foundational learning skills such as concentration, spatial orientation and number concept, visual and auditory memory, and verbal comprehension. Can be applied one-on-one or in a group.

Psychologie Online (Includes IQ Test Resources)

The English version of a Dutch site dealing with a broad variety of psychological topics including IQ tests, illusions, psychological disorders and personality.

A guide to Web resources for the social sciences.

Free IQ Test

Free IQ tests to test your intelligence.

Psychology & Mental Health Resources Directory.