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Syn: mental deficiency. Subnormal mental or intellectual function, usually originating in infancy or childhood. There are several levels, based on scores on the Wechsler scales. Mildly retarded persons are educable; moderately retarded persons can be trained to use the toilet, dress, and feed themselves; severe and profoundly retarded persons require varying degrees of personal care and supervision. See mental impairment.

Subjects: Public Health and Epidemiology.

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