Some hereditarians have been fearful that higher twentieth-century birth rates among those with lower intelligence scores would shove average intelligence scores progressively downward.This fear has been most directly alleviated by the discovery of
A) mental ages.
B) the g factor.
C) content validity.
D) the Flynn effect.

Question

Quizplus · Accepted Answer

The Flynn effect, which is the observed rise in average intelligence scores over time, has shown that intelligence is not solely determined by genetics, but also influenced by environmental factors such as education, nutrition, and technology. This means that even if there are higher birth rates among those with lower intelligence scores, the overall average intelligence scores can still increase over time due to the Flynn effect.

Some Hereditarians Have Been Fearful That Higher Twentieth-Century Birth Rates