Developmental changes in the expression of superordinates in children's word definitions were studied with 96 elementary school students. Superordination increased significantly and changed qualitatively with age, although across grades children produced more superordinates for nouns than for adjectives or verbs. (SLD)

Research literature on childrens' causal understanding in oral and written settings is reviewed. Results show that maturation and task complexity both influence childrens' causal understanding. However, the findings are contradictory, and no generalizations could be made about which factors influence causal understanding and at which ages they are…

In all of his published work, Jean Piaget never abandoned his original theoretical framework for the understanding of human development. This framework insists that intelligence is essentially a biological phenomenon; its development is best understood as the development of a sophisticated and highly successful adaptation device. This device…