The victim in the Arizona case, Adkins, was mentally disabled and was estimated to have a mental age of 13.
The result, however, showed a mental age of 11½ years, or an I Q of 143.
mental age in the first test was 8-6 and in the second test 11.
The calculation of mental age is therefore simplicity itself.
Thus, an error of 10 months in the mental age of a 5-year-old means an error of almost 15 per cent in the intelligence quotient.
As it is she is at least a grade below where she belongs by mental age.
The intelligence quotient (often designated as I Q) is the ratio of mental age to chronological age.
On the whole, however the test correlates fairly well with mental age.
The mental age of a subject is meaningless if considered apart from chronological age.
Their mental age ranges from three to seven years inclusive.
mental age n.
Abbr. MA, M.A.
A measure of mental development as determined by intelligence tests, generally restricted to children and expressed as the age at which that level is typically attained.