ABSTRACT
Jean Piaget has had an enormous impact on child psychiatry and occupies a crucial position in the systematic probing of the mind of the child and elucidating intellectual development. He combined his knowledge of biology, logic, and psychology with detailed observations and penetrating insights to provide us with a rich lode of theory and data about intellectual development. But his curiosity continued unabated, and he always continued to be interested in the more primitive mechanisms illustrated by infantile perceptions.
