Convincing evidence for the role of environmental influences on intelligence is provided by studies that compare
A) adopted children to their biological parents.
B) adopted children to their adoptive parents.
C) children reared by their biological parents to their biological parents.
D) identical twins reared together and fraternal twins reared together.

Question

Quizplus · Accepted Answer

Studies that compare adopted children to their adoptive parents provide evidence for the role of environmental influences on intelligence, as the children do not share genetics with their adoptive parents but may still share environmental factors such as upbringing and education. Comparing adopted children to their biological parents (option A) can also provide some evidence, but it is unclear whether the differences seen are due to genetics or environment. Option C is not a valid comparison as it only involves biological parents. Option D is a comparison of genetics, not environment.

Convincing Evidence for the Role of Environmental Influences on Intelligence