Which of the following pairs of correlation coefficients most closely corresponds to the observed correlations between the intelligence scores of adopted children and those of their adoptive or biological parents
A)child-adoptive: 0.20; child-biological: 0.40
B)child-adoptive: 0.40; child-biological: 0.40
C)child-adoptive: 0.20; child-biological: 0.20
D)child-adoptive: 0.50; child-biological: 0.50

Question

Quizplus · Accepted Answer

Research generally shows that the correlation between adopted children's intelligence scores and those of their biological parents is higher than the correlation between adopted children's intelligence scores and those of their adoptive parents. This suggests a genetic component to intelligence. Option A reflects this pattern, with a higher correlation to biological parents (0.40) than to adoptive parents (0.20).

Which of the Following Pairs of Correlation Coefficients Most Closely