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: 0.15; child-biological: 0.28
B) child-adoptive: 0.28; child-biological: 0.15
C) child-adoptive: 0.90; child-biological: 0.10
D) child-adoptive: 0.10; child-biological: 0.90

Question

Quizplus · Accepted Answer

Research in behavioral genetics has consistently shown that the intelligence scores of adopted children have a higher correlation with their biological parents than with their adoptive parents. This is because intelligence has a significant genetic component. The options provided suggest that the correlation with biological parents (0.28) is higher than with adoptive parents (0.15), which aligns with empirical findings.

Which of the Following Pairs of Correlation Coefficients Most Closely