Thursday, May 13, 2010
More on European ancestry and IQ
As a follow-up to the last post, the Add Health Study has a measure of IQ based on a vocabulary test. I calculated mean IQs for two groups: people who, on the racial question, only marked black, and people who marked both black and white. The mean for full blacks is 90.3 (n = 1,464), and it's 98.0 for the mixed group (n = 82). The difference is statistically significant.