An empirical examination of sex differences in scoring preschool children's aggression.

Sex differences in adults' observations and ratings of children's aggression was studied in a sample of preschool children (N=89, mean age=44.00months, SD=8.48).

A longitudinal study of preschool children's (Homo sapiens) sex segregation.

In this 2-year longitudinal study, we hypothesized that sex of the human child (Homo sapiens), differences in physical activity, and time of the year would interact to influence preschool children's sex segregation. We also hypothesized that activity would differentially relate to peer rejection for boys and girls. Consistent with the first hypothesis, high-activity girls started off as the most integrated group but became more segregated with time, whereas high-activity boys remained the most segregated group across the duration of the study.