Alfred Binet
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Alfred Binet, born Alfredo Binetti, was a French psychologist who together with Théodore Simon invented the first practical intelligence test, the Binet–Simon test. In 1904, Binet took part in a commi
Mental age
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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 performance for that individual's a
Intellectually disabled patients with 1- and 2-year-old mental ages
A 78-year-old intellectually disabled woman whose "mental condition has always been that of a child 5 or 6 years of age"