This book represents an attempt to understand the evolution of Jean Piaget's basic ideas in the context of his own intellectual development. Piaget sought to elucidate human knowledge by studying its origins and development. In this book, Michael Chapman applies the same method to Piaget's own thinking. Dr. Chapman shows that some of the Swiss psychologist's essential ideas originated in adolescent philosophical speculations about the relation between science and value. These same ideas were then developed step by step in Piaget's investigations of children's cognitive development.

Dr....