Evidence from cross cultural studies and observational studies are provided to support the contentions that males are more aggressive than females and that this sex difference is evident as early as the preschool years. (Author/MP)

Sex segregation is a powerful phenomenon in childhood. It occurs universally whenever children have a choice of playmates and is found in sub-human primates too. Adults are not directly responsible for sex segregation. Data do not support the hypothesis that the most ladylike girls and the most rough and active boys first form the segregated play…

Our culture's preoccupation with gender differences is reflected in the importance developmental psychologists have placed on gender-related issues. Discusses the following areas of research where gender has been a primary focus: (1) measurement of intellectual abilities; (2) biology and behavior; and (3) socialization processes. Discusses policy…