thought disorder

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Any pathological disturbance of thought processes, including delusions, flight of ideas, loosening of associations, or perseveration (2), characteristic of certain mental disorders, notably schizophrenia, and considered by some authorities, including the Swiss psychiatrist Eugen Bleuler (1857–1939), who coined the term schizophrenia, to be the defining feature of that disorder. Because of the difficulty of defining it objectively, DSM-IV limits the term to disorganization of speech. See also cognitive slippage, overinclusiveness, proverbs test.

Subjects: Psychology.

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