The author has had extensive experience in teaching medical students and pediatricians-in-training, as well as practitioners, the psychologic aspects of medical practice. He has collected in this book much of the material which he has used in his teaching exercises. It is not meant to be a text-book of child psychiatry, nor a treatise on how to manage specific behavior problems. Rather it is an over-all appraisal of child development, of interpersonal relations and the mechanisms by which people adapt to various life situations.