Biological, psychosocial, and sociocultural factors all contribute to abnormal behavior. The document discusses several causal factors at each level:
Biological factors include genetic defects, constitutional liabilities, physical deprivation, disruptive emotional processes, and brain pathology. Psychosocial factors comprise maternal deprivation, pathogenic family environments, early psychic trauma, and problematic interpersonal relationships. Sociocultural influences involve issues like war, prejudice, economic problems, and rapid social change. The causes of abnormal behavior are complex and multifactorial rather than the result of any single influence.