| the level of native mental ability or capacity of an individual, usually as determined by an intelligence test, in relation to the chronological age of the average individual at this level: a ten-year-old child with the mental age of a twelve-year-old; a mental age of twelve. |
| mental age n. Abbr. MA A measure of mental development as determined by intelligence tests, generally restricted to children and persons with intellectual impairment and expressed as the age at which that level of development is typically attained. |
mental age n.
Abbr. MA, M.A.
A measure of mental development as determined by intelligence tests, generally restricted to children and expressed as the age at which that level is typically attained.
mental age
intelligence test score, expressed as the chronological age for which a given level of performance is average or typical. An individual's mental age is then divided by his chronological age and multiplied by 100, yielding an intelligence quotient (IQ). Thus, a subject whose mental and chronological ages are identical has an IQ of 100, or average intelligence. However, if a 10-year-old has a mental age of 13, his IQ is 130, well above average. Since the average mental age of adults does not increase past age 18, an adult taking an IQ test is assigned the chronological age of 18
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