The IQ correlation of identical twins raised apart is higher than that of fraternal twins raised in the same household.

Question

Quizplus · Accepted Answer

This statement is true according to research on twins and IQ. Identical twins share 100% of their genetic material, while fraternal twins share approximately 50%, making them a good comparison group. Studies have found that the IQ correlation between identical twins raised apart is typically around 0.7-0.8, while the correlation between fraternal twins raised together is around 0.4-0.6. This suggests that genetics play a significant role in determining IQ.

The IQ Correlation of Identical Twins Raised Apart Is Higher