Definitely, but the author is still right to point out that black people are overrepresented in the sample. You could argue that there is still a gap between bl

Definitely, but the author is still right to point out that black people are overrepresented in the sample. You could argue that there is still a gap between black and white Americans in terms of education, wealth, etc., and IQ is partially influenced by environmental factors such as maternal/paternal education level (http://www.sciencedirect.com/science/article/pii/S0899900707000068 http://www.sciencedirect.com/science/article/pii/S0899900707...).