Ok then I'm really unclear what you're point is. Yes, there are observable performance differences that align across observable ethnic boundaries. No one in th

Ok then I'm really unclear what you're point is. Yes, there are observable performance differences that align across observable ethnic boundaries. No one in this thread questioned this (keep in mind stereotype threat is a phenotypic difference). If that's the only claim you're making, I'm not sure why you felt the need to cite Rushton of all people, who was specifically arguing that these differences were genotypic in nature.