C. Bohn

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The authors examined preschoolers' aggressive and cooperative behaviors and their associations with social dominance. First and as predicted, directly observed aggressive interactions decreased across the school year, and same-sex aggression occurred more frequently than cross-sex aggression. Next, the authors examined the relation between aggression and(More)
However, a similar trend was observed in a much more rigorously conducted survey in England (Blatchford & Sumpner, 1998). That survey's nationally representative random sample of primary and secondary schools (1 in 10 of such schools in the country) found uniform erosion of recess time across a 5-year period (1990/1991– 1995/1996). Declines in recess(More)
The interactive influence of preschool children's level of physical activity, sex, and time on the degree of sex segregation was assessed. A sample of nursery school children was observed across much of a school year, and levels of physical activity and sex segregation were sampled during their free play periods. Following sexual selection theory, we(More)
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