The 15-point IQ gains that have occurred in 14 nations in the last 30 years reflect the effects of
A) genetics.
B) immigration as more diversity occurs in Westernized nations.
C) environment, such as improved education and nutrition.
D) culture-fair intelligence testing.

Question

Quizplus · Accepted Answer

The 15-point IQ gains in 14 nations in the last 30 years are likely due to environmental factors such as improved education and nutrition. Genetics and immigration are unlikely to have such a widespread and rapid effect on IQ, and culture-fair intelligence testing is not likely to have caused such a significant increase in IQ scores.

The 15-Point IQ Gains That Have Occurred in 14 Nations