This document defines and describes several types of psychological disorders, including anxiety disorders, mood disorders, personality disorders, schizophrenia, delusional disorder, substance use disorder, dissociative disorders, and impulse control disorder. It discusses characteristics, causes, and symptoms of these conditions. Key topics covered include types of anxiety like generalized anxiety disorder, phobias, obsessive-compulsive disorder, and post-traumatic stress disorder; bipolar disorder and depressive disorders; criteria for personality disorders; positive and negative symptoms of schizophrenia; and characteristics of dissociative amnesia and depersonalization disorders.