A noted pediatrician and child psychologist looks at the controversial question of biologically based gender differences, arguing that these variations are a biological reality and that they play a key role in the development of personality traits and intellectual and social skills. 25,000 first printing.

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LEONARD SAX, M.D., is a pediatrician and a psychologist and the founder of the National Association for Single-Sex Public Education. An independent Washington-area pediatrician with a very large practice, he has won a number of local awards.

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