The correlation for IQ between parents and children is about .42 whereas the correlation between siblings in the same family is:
A)Much weaker,with a correlation coefficient of about .30
B)Much stronger,with a correlation coefficient of over .60
C)Not identical,but the coefficients for both are between .40 and .50
D)None of the above

Question

Quizplus · Accepted Answer

Studies have shown that the correlation between siblings' IQ scores in the same family is typically between .40 and .50, which is not as strong as the correlation between parents and children but still significant. Option A is incorrect because the correlation between siblings' IQ scores is not much weaker than the correlation between parents and children. Option B is incorrect because the correlation between siblings' IQ scores is not much stronger than the correlation between parents and children. Option D is incorrect because there is a known correlation between siblings' IQ scores, even though it is not as strong as the correlation between parents and children.

The Correlation for IQ Between Parents and Children Is About