Which evidence best demonstrates an environmental impact on intelligence?
A)A high correlation between the IQ scores of identical twins
B)A low correlation between the IQ scores of strangers
C)The rapid increase in average WISC scores seen during the past 25 years
D)The stability of WISC scores seen during the past 25 years

Question

Which evidence best demonstrates an environmental impact on intelligence?
A)​A high correlation between the IQ scores of identical twins
B)A low correlation between the IQ scores of strangers ​
C)The rapid increase in average WISC scores seen during the past 25 years ​
D)The stability of WISC scores seen during the past 25 years ​

Quizplus · Accepted Answer

The rapid increase in average WISC scores during the past 25 years suggests that there has been a positive environmental impact on intelligence. This is because WISC scores are standardized IQ tests used to measure intelligence, and the increase in scores indicates that the environment has been promoting cognitive development. A and B are not relevant to environmental impact on intelligence, and D only shows stability in scores, not a change due to environmental impact.

Which Evidence Best Demonstrates an Environmental Impact on Intelligence