The fact that IQ correlations increase with age for identical twins, but decrease with age for fraternal twins, suggests that
A) the genetic likeness of identical twins causes them to seek out similar niches in adolescence and adulthood.
B) the influence of rearing conditions on IQ is stronger for identical twins than fraternal twins.
C) rearing experiences play a larger role early in life, whereas genetic influences play a larger role later in life.
D) the contribution of heredity to IQ decreases with age.

Question

Quizplus · Accepted Answer

Identical twins share more genetic material than fraternal twins, and as they age, they may seek out similar environments that enhance their genetic predispositions, leading to increased IQ correlations.

The Fact That IQ Correlations Increase with Age for Identical