Adoption studies of intelligence suggest that
A) genetics is the only determinant of intelligence.
B) family environment more strongly determines intelligence than genetics.
C) both genetics and environment contribute to intelligence.
D) no clear method exists to assess the relative contributions of genetics and experience on intelligence.

Question

Quizplus · Accepted Answer

Adoption studies have shown that both genetics and environment contribute to intelligence. Children who are adopted have different genetics than their adoptive parents, but they may share some environmental factors. On the other hand, they may also share genetics with their biological parents, but have a different environment. By comparing the intelligence of adopted children to both their biological and adoptive families, researchers have found that genetics and environment both play a role in intelligence.

Adoption Studies of Intelligence Suggest That