Chapter 13, Ethnic Differences in Cognitive Ability, Chapter 14, Ethnic Inequalities in Relation to IQ Summary and Analysis

There is no doubt that there are ethnic differences in IQ. Large human groups vary between one another culturally and biologically, so the notion that they might vary in intelligence should not surprise anyone. These differences have important social consequences, but they are not as bad as many suppose.

East Asians have the highest scores in IQ and achievement tests. It is not clear how large the difference is, whether it ranges from a few to ten points. But East Asians have higher nonverbal intelligence but equal or lower in verbal intelligence.

African-Americans and European-Americans differ by an entire standard deviation. The average white has a higher IQ than 84% of blacks. Average black and white IQs vary...