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mental age

   Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Acronyms, Wikipedia, Hutchinson 0.01 sec.
mental age: see intelligence intelligence, in psychology, the general mental ability involved in calculating, reasoning, perceiving relationships and analogies, learning quickly, storing and retrieving information, using language fluently, classifying, generalizing, and adjusting to new
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However, Stern expressed mental age not as "years behind" or "years ahead" of peers, as Binet had, but rather as a quotient, mental age divided by chronological age.
For example, teenagers with borderline mental retardation experience a developmental delay of 2-4 years, and mildly retarded teenagers have a mental age that is roughly 5-8 years younger than their chronological age.
Born with cerebral palsy and without control of a single muscle in his body, Shawn is unable to communicate and is therefore presumed to have the mental age of a three-month-old.
 
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