In this stimulating, provocative, and at times irritating volume, Dr. Werner Wolff, Professor of Psychology at Bard College, presents the conclusions of many years of research on the structure of the personality of the preschool child. Feeling the need to supplement the mass of material on the overt behavior of children, already gathered by other investigators, he focused his attention on the hidden forces and motivations of child behavior, designing new experiments to 'explore the expressive behavior of children in their spontaneous verbal, graphic and dramatic expressions'. Two main concepts emerged from his studies. First, he recognized that