The result, however, showed a mental age of 11½ years, or an I Q of 143.
As it is she is at least a grade below where she belongs by mental age.
Mental age in the first test was 8-6 and in the second test 11.
Their mental age ranges from three to seven years inclusive.
If he goes only as far as normal 8-year-old children ordinarily go, we say that his “mental age” is 8 years.