## ABSTRACT

This is Volume XXII of thirty-two on a series of Developmental Psychology. Originally published in 1958, this text offers a translation from French of an essay on the construction of formal operational structures to explain part of the growth of logic in a child's brain and development. It looks at propositional logic, the integration of formal thought and the operational schemata of formal logic.

## TABLE OF CONTENTS

part 1|104 pages

The Development of Propositional Logic

part 2|138 pages

The Operational Schemata of Formal Logic

part 3|108 pages

The Structural Integration of Formal Thought