In this course, the psychological foundations of child and adolescent delinquency, the basis for children and adolescents being involved in crime, and information regarding the juvenile justice system will be given. One goal of this course is to understand how juvenile delinquency is dealt with historically by focusing on individual and societal based approaches and for the student to understand how their role as a psychologist influences “preventive measures”. In addition to the psychological foundation of delinquency, physiological and sociological perspectives will also be covered. Here, the role and contribution of the family, school and peers in criminal behavior will be examined. Also, legal aspects of child delinquency in the Turkish Republic, including penalties and rehabilitation will be analyzed.