The deviation IQ became necessary because
A)standard deviations for IQ's were the same across age groups.
B)IQ's at one age level did not compare to IQ's at another age level in terms of percentiles.
C)the IQ was difficult to calculate.
D)the IQ was a cumbersome concept.

Question

Quizplus · Accepted Answer

IQ scores at different age levels were not comparable in terms of percentiles, which necessitated the development of the deviation IQ to ensure that IQ scores are standardized across different ages. This allows for a more accurate comparison of intelligence levels regardless of the age of the individuals.

The Deviation IQ Became Necessary Because