Intelligence quotient, as a useful means of measuring brain capacity, has come increasingly into the public eye in recent years. This famous book (and its seque

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

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

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

Attractive, take-anywhere, write-in quiz book that offers a daily dose of self-discovery! How Smart Are You? Test Your IQ is perfect for a handbag, briefcase, o