When researcher had the same individuals take an intelligence test that had been developed in 1978 and another test that had been developed in 1947, they found that
A) they scored about 8 points higher on the newer test.
B) they scored about 8 points higher on the older test.
C) they scored about the same on both tests.
D) some individuals scored higher on the old test, and some scored higher on the newer test.

Question

Quizplus · Accepted Answer

This phenomenon is explained by the Flynn effect, which observes that IQ scores have generally increased over time across the world. When individuals take an older test, they tend to score higher because the norms of the test have not been updated to reflect the general increase in intelligence scores.

When Researcher Had the Same Individuals Take an Intelligence Test