When one's mental age is lower than one's actual age in years,then
A)one's IQ is over 100.
B)one's IQ is below 100.
C)one's IQ is 100.
D)the test lacks reliability.

Question

Quizplus · Accepted Answer

Mental age is a measure of intelligence level based on the average age at which people achieve certain intellectual milestones. If someone's mental age is lower than their actual chronological age, that suggests they have lower than average intelligence, which would correspond to an IQ score below 100. Therefore, the best choice is B.

When One's Mental Age Is Lower Than One's Actual Age