How do children learn and how are new modes of thought developed? These questions have for years been of paramount interest to psychologists and others concerned with the cognitive development of the child.

In this major work, originally published in 1974 and reporting on over ten years research of the Geneva School, the authors carried the pioneering investigations of Jean Piaget to a new and remarkable level. As Piaget said in his foreword to the book: The novelty of the findings, the clarity of the theoretical interpretation, and the sometimes even excessive caution of the...

Although originally published in France in 1951 this English translation was not published until 1975. The book supplements the authors previous publications on the development of thought in the child and is the result of two preoccupations: how thought that is in the process of formation acts to assimilate those aspects of experience that cannot be assimilated deductively for example, the randomly mixed; and the necessity of discovering how the mental processes work in the totality of spontaneous and experimental searchings that make up what is called the problem of induction . Induction...