The correlation of intelligence test scores between identical twins is
A)higher when they are raised together than when they are raised apart.
B)greater than that for fraternal twins raised together.
C)higher than that for any other blood relatives.
D)all of these.

Question

Quizplus · Accepted Answer

Studies have shown that identical twins who are raised together have a higher correlation of intelligence test scores compared to identical twins raised apart. Furthermore, the correlation of intelligence test scores between identical twins is greater than that for fraternal twins raised together. Additionally, the correlation of intelligence test scores between identical twins is higher than that for any other blood relatives. Therefore, option D is the correct answer as it encompasses all the above-mentioned assertions.

The Correlation of Intelligence Test Scores Between Identical Twins Is