A historical and transcultural view of adolescence.- Concepts of adolescence; their applicability to normal and clinical samples.- Psychological changes in adolescence related to physical changes.- The psychobiology of developmental behavior disorders.- Influence of early exposure to steroid hormones on behavioral development.- The effects of a chronic illness on somatic growth and psychological development.- Adolescents and family disruption through marital separation.- Erotic overtures and sexual contacts; competence, rules, attitudes and problems.- Sex roles and coping with emotions.- Outpatient social skills training for youth in trouble; theoretical background, practice and outcome.- The implementation and evaluation of a residential social skills training program for youth in trouble.- Suicidal behaviour among adolescents.- How are we to deal with adolescents and their problems?.- Epidemiology and the role of public health organizations.