The Texas Adoption Project and other similar investigations confirm that
A) both environment and heredity contribute to IQ.
B) environment plays a greater role than heredity in IQ.
C) heredity plays a greater role than environment in IQ.
D) children adopted before age 6 score 10 to 15 IQ points below the mean.

Question

Quizplus · Accepted Answer

The Texas Adoption Project and other similar investigations have confirmed that both environment and heredity contribute to IQ. Therefore, option A is the correct answer. Option B and C are both incorrect as they suggest that only one factor (either environment or heredity) contributes more to IQ. Option D is also incorrect as it provides a specific numerical value that is not universally applicable to all cases.

The Texas Adoption Project and Other Similar Investigations Confirm That