major theories of development in historical and contemporary context, giving readers breadth as well as depth of understanding. New to the third edition: an exciting new chapter that integrates Vygotsky's theory, contextualism, ecological psychology, and cultural psychology; new material on Piaget in the last few years before his death; new views of strategies, capacity, and microgenetic changes; new discussion of issues of domain specificity in information-processing, biological, and Piagetian theories; extensive updating throughout.

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