Eight-year-old Terry's performance on an intelligence test is at a level characteristic of an average 5-year-old. Terry's mental age is:
A)8.
B)6.
C)4.
D)5.

Question

Quizplus · Accepted Answer

Terry's mental age is the age level at which his cognitive abilities are functioning, regardless of his chronological age. Since his performance on the test is comparable to that of an average 5-year-old, his mental age is 5.

Eight-Year-Old Terry's Performance on an Intelligence Test Is at a Level