The modern ideal of international cooperation, which it is desired to incorporate in the future education of the young, is based on the two main principles of solidarity and justice. In this essay, the author discusses two aspects on the problem of solidarity: (1) moral aspect; and (2) intellectual aspect. In connection with the moral aspect, the…

Analyzed are the processes of classification and seriation which form the child's ability to reason, based upon the results of eight years of experimental work with over 2000 children. The authors have found that there is a very close relation between the development of logical actions and that of sub-logical operations and actions. The fact that…

Based on the hypothesis that the construction of number is closely related to the development of logic, this book records a series of experiments investigating classes, relations, and numbers as cognitive domains. The author finds that number is organized, stage after stage, in close connection with the gradual elaboration of systems of inclusions…

This book deals with the development of the child's notion about space. The authors' investigations have been concerned with the order and manner in which children begin to imagine or visualize the various spatial entities and spatial characteristics of objects. They report that the child first recognizes various objects by sense of touch alone…

In this book Piaget considers the way children learn about the world. He addresses such questions as the following: How does a child learn to perceive the world around him? How, for example, does he learn that by grasping an object, he can pull it towards him, or that a ball of clay, flattened, is no smaller than it was before? How does he learn…