Integrating diverse scientific data, this book relates the biological versus psychosocial aspects of adolescence. Relevant data from scientific literature have been pulled together into a systematic presentation of the biological and psychosocial issues of contemporary adolescence. Part I describes the biological and sociopsychological developmental processes; Part II focuses on the special problems of contemporary adolescents; Part III analyzes the causes of the problems and discusses tentative remedies. Written for psychologists, psychiatrists, sociologists, and anthropologists.