What evidence has indicated the importance of genetic factors in intelligence?
A)Identical twins reared together and identical twins reared apart have similar, though not exact, correlations of IQ scores.
B)Fraternal twins reared together and fraternal twins reared apart have dissimilar correlations of IQ scores.
C)Adopted children have relatively highly correlated IQ scores with their adoptive parents.
D)No evidence exists indicating the importance of genetic factors in intelligence.

Question

Quizplus · Accepted Answer

Studies on identical twins, both reared together and apart, have shown that there is a significant genetic component to intelligence, as evidenced by the similar correlations in their IQ scores despite different environments.

What Evidence Has Indicated the Importance of Genetic Factors in Intelligence