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Branch of psychology. It is concerned with mental and emotional disorders (e.g., neurosis, psychosis, mental deficiency) and with certain incompletely understood normal phenomena (such as dreams and hypnosis). The chief tool used in classifying psychological disorders is the American Psychiatric Assn.'s Diagnostic and Statistical Manual of Mental Disorders 4th edition (DSM-IV).
Variants of ABNORMAL PSYCHOLOGY
abnormal psychology or psychopathology
This entry comes from Encyclopædia Britannica Concise. For the full entry on abnormal psychology, visit Britannica.com.