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Mental age is a concept related to intelligence. It looks at how a specific individual, at a specific age, performs intellectually, compared to average intellectual ...
The mental age was established independently from the chronological age, meaning that a child could have the mental age of a 10-year-old and the chronological age of a 12-year-old. It was also possible for a child to have a higher mental age than their chronological age. [3] If the mental age of a child was two years behind their chronological ...
Terman and Merrill attempted to calculate IQs with a uniform standard deviation while still maintaining the use of the mental age scale by including a formula in the manual to convert the ratio IQs with means varying between age ranges and nonuniform standard deviations to IQs with a mean of 100 and a uniform standard deviation of 16.
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An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. [1] Originally, IQ was a score obtained by dividing a person's mental age score, obtained by administering an intelligence test, by the person's chronological age, both expressed in terms of years and months.
Wechsler believed that "mental age norms clearly did not apply to adults." [6] Wechsler criticized the then existing Binet scale because "it did not consider that intellectual performance could deteriorate as a person grew older." [6] These criticisms of the 1937 Binet test helped produce the Wechsler–Bellevue scale, released in 1939.