Which example lends the strongest support to an environmental explanation of intelligence?
A) Bright children take better advantage of their environmental resources.
B) Siblings raised in different homes have IQs of 100 to 120.
C) Children with intellectual disabilities who are moved from institutions into adoptive homes have an average gain of 30 IQ points.
D) Minority groups in the United States have a mean IQ that is 15 points below the mean of the majority.

Question

Quizplus · Accepted Answer

The fact that children with intellectual disabilities who are moved from institutions into adoptive homes have an average gain of 30 IQ points strongly supports an environmental explanation of intelligence. This suggests that improving the quality of the environment can have a significant impact on intelligence.

Which Example Lends the Strongest Support to an Environmental Explanation