It is interesting that in the discussion about 'The Bell Curve', Richard Haier makes a point about the 15 point difference, as described in the book that uses terminology 'white vs. black' Americans. Then he goes on to use a very different terminology, 'disadvantaged groups were on average lower than Caucasians', which is a different perspective showing his own bias in my opinion.<br>"Black vs. White" is skin color based. To me that is not even racial, it is a way of observing how someone looks based upon one's perception. "Disadvanted vs. Caucasion" is entirely different, defining people from a socioeconomic level as opposed to their anthropological history. That's a huge jump in a description of a comparison.,(reply>), He used "disadvantaged" instead of black or brown because he's a part of the academic establishment and he fell for the speech police.,(reply>), What? Caucasian is literally a racial category, setting aside the existence of the actual Caucasian ethnic groups that leave in the Caucasus mountains.