Suppose we know that the variability of IQ scores is higher among one group of individuals than among another. What might this tell us about the heritability of IQ in the two groups?
A) Heritability should be higher among the group in which IQ scores are more variable.
B) Nothing. Heritability refers to a proportion of variability, not an amount.
C) Heritability should be higher among the group in which IQ scores are less variable.
D) Heritability is probably equivalent in the two groups.

Question

Quizplus · Accepted Answer

Heritability is a measure of how much of the variation in a trait can be attributed to genetic differences, rather than differences in the environment. The statement that variability of IQ scores is higher in one group than another does not directly inform us about the proportion of that variability due to genetics versus environment, which is what heritability measures.

Suppose We Know That the Variability of IQ Scores Is