In the last post, we saw saw that Mexican Americans born in the US had a mean IQ that rose from the 1980s to the 2000s, but reversed course since then. It is currently 91.5.
That made me curious about other American groups. Let's start with all whites over the past four decades (GSS Wordsum measure, N = 20, 482):
Mean IQ for whites
As we saw with Mex-Ams, whites peaked in the 2000s, but then IQ's dropped in the past decade -- one-half a point.
This is consistent with Greg Cochran's claim that the US is undergoing rapid change in genetic potential for IQ due to intelligent people having fewer offspring. It might be decreasing one point per generation.
Richard Lynn's new book Race Differences in Psychopathic Personality makes a convincing case that blacks and American Indians scor...
In the comments in the last post , some readers contended that Jews are not ethnocentric. Using the same question I used in the comments se...
Which factor reduces family size the most? Below are the standardized OLS regression coefficients for a sample of whites ages 40-59: Stand...
Via a reader at iSteve, it looks like this might be the vocabulary test used by the General Social Survey. (Someone please tell me if I'...