mental age
Noun
Meaning
the level of intellectual development as measured by an intelligence test
Source: WordNetSynonyms
Antonyms
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Examples
A third prisoner, Tamaeli, was about 16, but had a much younger mental age, and little English, because of which he was more frequently physically abused by Larsen.
Individuals with the lowest mental age level (less than three years) were identified as idiots; imbeciles had a mental age of three to seven years, and morons had a mental age of seven to ten years. citation.
For example, a six-year-old child who passed all the tasks usually passed by six-year-olds—but nothing beyond—would have a mental age that matched his chronological age, 6.0.