Do you know what your I.Q. is? This is the easy way to find out!The Intelligence Quotient remains the definitive means of assessing brain capacity, and this cla

In this sequel to Know Your Own IQ, Eysenck responds to criticisms, providing five new tests of the standard type as a check. He also provides three specific te

Over the last few decades, economists and psychologists have quietly documented the many ways in which a person's IQ matters. But, research suggests that a nati

Find out where you rank on the IQ scale by taking this entertaining, self-scoring test.

A detailed explanation of what IQ means and how it is measured – including eight tests you can take! In Test Your IQ, Professor Hans Eysenck, the world-renown