ABSTRACT
Piaget’s publications are numerous and widely dispersed. Only a small percentage has been translated into English. His findings on the nature of knowledge, on the genesis of intelligence and its development from infancy to adulthood are the result of over half a century of continuous research. His methods are unique and manifest his great empathy and sensitivity to the mental activities of the subjects he has observed. His solid background in biology, logic, mathematics, philosophy, and psychology have enabled him to integrate ideas and research from various disciplines in formulating his theories. He continually revises and refines his conclusions in the light of the new evidence for or against his findings.
