Longitudinal research shows that
A) the impact of shared environmental influences is greatest in adolescence.
B) birth order and spacing are strong predictors of IQ.
C) in adolescence, the IQ resemblance between fraternal twins increases.
D) the IQs of unrelated siblings are no longer correlated at adolescence.

Question

Quizplus · Accepted Answer

Longitudinal research indicates that the IQ correlation between unrelated siblings tends to decrease as they reach adolescence, suggesting that shared environmental influences diminish over time.

Longitudinal Research Shows That