Twenty first-graders observed an adult model perform a quantity conservation task. The children were then tested on a series of generalization tasks immediately, after one week, and after three months. The results suggested that the social experience of observation appeared to activate a cognitive restructuring of the children's mental operations.…

Examines the role of modeling and social reciprocity in the regulation of young boys' aggressive actions. Tested in pairs, 100 first- and second-grade students were assigned to five experimental conditions differing in whether one or both boys saw a film depicting aggression directed toward persons or toward inanimate objects. (RH)