Murray is studying the effects of heredity and environment on IQ test scores.He thinks that heredity is the most important factor in determining IQ.Which finding would support his argument most strongly?
A) Identical twins reared together tend to have similar IQ scores.
B) Identical twins reared apart tend to have similar IQ scores.
C) Siblings reared together tend to have similar IQ scores.
D) Unrelated children reared together tend to have similar IQ scores.

Question

Quizplus · Accepted Answer

Identical twins share 100% of their genetic material, so if they have similar IQ scores even when reared apart, it suggests that genetics plays a strong role in determining IQ. This finding would support Murray's argument that heredity is the most important factor in determining IQ.

Murray Is Studying the Effects of Heredity and Environment on IQ