When we compare the similarity in intelligence scores for identical twins reared together with identical twins reared apart, we find that identical twins reared apart __________.
A) are significantly less similar than are identical twins reared together
B) are nearly as similar as identical twins reared together
C) are as similar as identical twins reared together in mathematical skills but significantly different in verbal abilities
D) score significantly lower than identical twins reared together

Question

Quizplus · Accepted Answer

Research studies have found that identical twins reared apart have very similar intelligence scores, nearly as high as those of identical twins reared together. This suggests that genetics play a strong role in determining intelligence, although environmental factors also have some influence. Option A and Option D are incorrect because it is not true that identical twins reared apart score significantly less or lower than identical twins reared together. Option C is incorrect because there is no empirical evidence to support that identical twins reared apart are as similar as identical twins reared together in mathematical skills but significantly different in verbal abilities.

When We Compare the Similarity in Intelligence Scores for Identical