It was concluded that previous explanations of visual exploration or stimulus preference have been oversimplified, and studies on the whole have failed to take into account a crucial interaction between sex and age variables. (Authors)

This essay attempts to describe how age relations are important to the social behavior of preschool children. Major behaviors examined are sociability, friendship, aggression, and dominance. Imitation, cognitive development, social cognition, nurturance, and prosocial behavior are also briefly considered. (Author/SJL)

Six experiments were designed in order to compare the cooperative and competitive interaction of five-year-olds with that of older children up to age 10. For all experiments, children of the same age and same sex were matched in dyads. The children played various two-person games where they could obtain prizes in a variety of reward contingency…

This study examines the development of cooperative and negative behavior in a setting in which children of varied ages had regular opportunities for social encounters. Subjects were 16 children, half 16-19 months, half 28-32 months. Each child was observed 30 minutes per day for five days. Behaviors were recorded continuously. A narrative written…