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Abnormal behavior

Patterns of emotion, thought, and action considered pathological (diseased or disordered) for one or more of four reasons: statistical infrequency, disability or dysfunction, personal, distress, or violation of norms

DSM - Disnostic and Statistical Manual of Metal Disorders

Classification system developed by the American Pscyiatric Association used to describe abnormal behaviors; the "IV-TR" indicates it is the text revision (TR) of the fourth major revision (IV)


Legal term applied when people cannot be held responsible for their actions, or are judged incompetent to manage their own affairs, because of mental illness

Medical model

Perspective that assumes diseases (including mental illness) have physical causes that can be diagnoised, treated, and possibly cured


Outmoded term for disorders characterized by unrealistic anxiety and other associated problems; less severe disruptions than in psychosis


Branch of medicine dealing with the diagnosis, treatment, and prevention of mental disorders


Serious mental disorders characterized by extreme mental disruption and defective or lost contact with reality

Anxiety disorder

Overwhelming apprehension and fear accompanied by autonomic nervous system (ANS) arousal

Generalized anxiety disorder

Persistent, uncontrollable, and free-floating nonspecified anxiety

Obsessive-compulsive disorder

Intrusive, repetitive fearful thoughts (obsessions), urges to perform repetitive, ritualistic behaviors (compulsions), or both

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