As adopted children grow into adulthood, the correlation between their IQ scores and those of their biologically unrelated family members diminishes to zero.

Question

Quizplus · Accepted Answer

This statement is supported by research on adopted children and their IQ scores. The correlation between their IQ scores and those of their biologically unrelated family members decreases as they age and may eventually diminish to zero. This suggests that genetics plays a larger role in determining IQ than environmental factors later in life.

As Adopted Children Grow into Adulthood, the Correlation Between Their