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

Question

Quizplus · Accepted Answer

IQ is calculated based on the ratio of mental age to chronological age, multiplied by 100. If mental age is the same as chronological age, the ratio is 1:1, and therefore the IQ score is 100, which is considered average.

When One's Mental Age Is the Same as One's Actual