The 15-point IQ gains that have occurred in Westernized nations in the last 30 years reflect the
A)effect of genetics.
B)effect of immigration.
C)effect of environment, such as improved education.
D)braoder definition being used by psychologists regarding what constitutes intelligence.

Question

Quizplus · Accepted Answer

The increase in IQ scores over the last 30 years is largely due to environmental factors, such as improved education, healthcare, and nutrition. This is supported by studies that have found similar increases in countries where these improvements have been made, and no increases in countries where they have not. Genetic factors are unlikely to have changed significantly in such a short time period, and immigration cannot account for the overall increase across Westernized nations. The definition of intelligence has also not significantly changed in the last 30 years, making option D less likely.

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