This classic work, first published in German in 1926, was the first comprehensive introduction to the field of comparative developmental psychology. In her new prologue to this reprint of the revised edition, Franklin sketches the key events in Werner's life, the major themes in his concept, and relevant issues for today's scholars.

This classic work, first published in German in 1926 and subsequently in English in 1940, was the first comprehensive introduction to the field of comparative developmental psychology. In her new prologue to this reprint of the revised edition, originally published by International Universities Press in 1948, Margery Franklin sketches the key events in Werner's life, the major themes in his concept of development, and relevant issues for today's scholars.