Before revision: Mental age and IQ Intellectually disabled patients with 1- and 2-year-old mental ages 78-year-old intellectually disabled woman whose "mental condition has always been that of a child 5 or 6 years of age" Modern intelligence tests, such as the current Stanford-Binet test, no longer compute the IQ using the above "ratio IQ" formula.
After revision: AMental age and IQ Intellectually disabled patients with 1- and 2-year-old mental ages 78-year-old intellectually disabled woman whose "mental condition has always been that of a child 5 or 6 years of age" Modern intelligence tests, such as the current Stanford-Binet test, no longer compute the IQ using the above "ratio IQ" formula.