Why does every revision of an IQ test make the test more difficult?
A)To challenge students to work harder
B)To increase the number of children who qualify for special education
C)To keep the mean score from increasing above 100
D)To decrease the variation in scores

Question

Quizplus · Accepted Answer

IQ tests are designed in a way such that the mean score is set at 100. This means that each revision of the test has to be made more difficult to prevent the mean score from increasing above 100. This ensures that the test remains a reliable measure of intelligence over time.

Why Does Every Revision of an IQ Test Make the Test