This course is aimed at reviewing the definition, history and scope of deviant behavior, with an emphasis on the psychological factors that contribute to its origins, maintenance, and treatment. The course begins with definitions of adaptive and maladaptive behavior, a review of the historical background of abnormal psychology, and a look at theoretical perspectives on maladaptive behavior. Then, various therapeutic strategies (e.g., cognitive therapy) will be briefly introduced, and major classification and assessment methods of behavior disorders will be reviewed. A wide range of maladaptive patterns of behavior, including anxiety disorders, mood disorders, personality disorders, schizophrenia, and disorders of childhood and adolescence will be surveyed.