The document provides an overview of psychological disorders including: - Historical models including the supernatural model which saw disorders as possession and the natural/medical model which saw them as diseases. - Modern models including psychoanalytic, biological, cognitive-behavioral, and diathesis-stress. - The DSM-IV-TR classification system and descriptions of mood disorders like depression and mania, anxiety disorders, psychosomatic disorders, dissociative disorders, sexual/gender disorders, and personality disorders. - Personality disorders are grouped into three clusters characterized by odd/eccentric, dramatic/erratic, and anxious/fearful behaviors respectively. Common disorders are described within each cluster.