Taking an interdisciplinary approach, the text is intended as an introduction to language disorders in children. Aspects of tracking language in the nervous system considered include neural substrates of language development, operational systems, and operational mechanisms. Language and learning are discussed in terms of the psychological…

After intensively studying for several years the thinking processes of members of a tribal group in Western Africa, the Kpelle, the authors examine the relation between culture and cognitive development. The following issues are discussed: (1) an analysis of the terms "culture" and "cognition"; (2) an ethnographic description of the Kpelle…