Investigated the development of classificatory organization. Two experiments examined age differences in children's spontaneous extensions of a classification and a third examined children's extensions under hypothesis-testing instructions. (JMB)

Perceptual counterparts of a series of conservation of length tests were presented to subjects who were categorized as conservers or nonconservers conservation of length pre-tests, and to conservers and nonconservers given conservation length training. Perceptual performance of the untrained nonconservers was significantly worse than that of the…

Six experiments assessed young children's spatial orientation relative to their imagined surroundings. The experiments found that children as young as 3.5 years were able, like adults, to accurately walk along a path that replicated the route between their seat and the teacher's desk in their preschool classroom. (MDM)

Subjects of this study were 144 White, middle-class children in kindergarten, first, second, and fourth grades. Children were interviewed individually about their explanations for both academic and social outcomes and their evaluations of their own outcomes. Self-evaluations became less positive in both domains and less similar across domains with…

Assesses the degree of difficulty parents attribute to specific socialization tasks; explores the relation between parents' perceived difficulty and children's perceived and actual competence in these two domains; and determines whether the ease or difficulty of these child rearing tasks, as perceived by parents, varies as a function of the…