Biological approach explains abnormal behaviors through faulty processes due to genetical factors or organic function disorders in the nervous system and glands. Whatever the problem is, this model has three assumptions: Patient suffers from a physical or emotional pain due to an illness. It is possible to diagnose this illness by identifying certain symptoms. Each illness has a unique and certain reason. On the other hand, sociocultural approach makes the assumption that people’s behavior both normal and abnormal is shaped by the kind of family group, society, and culture in which they live.