Gowthami Bainaboina*
Abnormal Psychology is the study of unusual patterns of behaviour, emotion and mental disorder. The study of abnormal behaviour patterns that diverge widely from generally accepted norms.
There are different of disorders which includes Anxiety disorders, personality disorders, Mood disorders, Schizophrenia, Substance use disorders, Somatoform disorders, Mood disorders, Childhood disorders, sleep disorders, Eating disorders, Paranoid disorders, Organic mental disorder Obsessive Compulsive disorder and post traumatic stress disorder. DSM(Diagnostic statistical manual of mental disorder) is the book will classify the disorders and describe the symptoms. There are two major classification i.e., Neurotic disorder, and Psychotic disorder. Causes: Genetics, Nervous system, Cognitive and Behavioural, Emotional, social interpersonal, Developmental.