Mental age is a measure of mental development expressed in terms of the average mental ability at a given age.

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Mental age is a valid psychological concept that compares an individual's mental ability level to the average level of their chronological peers. This is calculated by administering standardized cognitive tests and comparing an individual's score to age norms that reflect average performance at different ages. The term "mental age" was first introduced by the French psychologist Alfred Binet in the early 20th century as part of his efforts to identify children who might need special education services. Today, the concept is still used in clinical and educational settings to evaluate intellectual functioning and design interventions to support cognitive development.

Mental Age Is a Measure of Mental Development Expressed in Terms