One of the reasons that William Stern's original formula for calculating IQ was abandoned was that
A)the ratio worked well for children but not for adults
B)the ratio worked well for adults but not for children
C)it failed to take a person's chronological age into account
D)it failed to take a person's mental age into account

Question

Quizplus · Accepted Answer

William Stern's original formula for calculating IQ, which involved dividing a person's mental age by their chronological age and then multiplying by 100, worked well for children but became less accurate for adults. This is because as people age, the difference in mental capabilities between individuals of the same age tends to narrow, making the ratio less meaningful.

One of the Reasons That William Stern's Original Formula for Calculating