Decades of research have demonstrated that deaf children generally lag behind hearing peers in terms of academic achievement, and that lags in some areas may never be overcome fully. Hundreds of research and intervention studies have been aimed at improving the situation, but they have resulted in only limited progress. This paper examines…

The present longitudinal multi-cohort study examines whether interindividual variability in cognitive performance and change increases in old age, and whether associations among developments of different cognitive functions increase with adult age. Multivariate multiple-group latent growth modeling was applied to data from narrow cohorts separated…

Investigates the linguistic and cognitive aspects of the mastery of the time conjunctions "before" and "after" by young children. (EKN)

This three-volume report deals with the hypothesis that males are more successful at solving mathematical and spatial problems than females. The general relationship between visual spatial abilities and mathematical problem-solving ability is also investigated. The research sample consisted of seventh graders. Each pupil took five spatial tests…

A review of Piaget's theory and research on children's cognitive development is presented, including a discussion of the psychological structures of intelligence, developmental constructivism, and the evolution of knowledge as a subject-object relation. Piaget's assessment techniques are summarized, including moral development, number…