In a recent editorial in the New York Times entitled, “All Brains Are the Same Color“, Dr. Nisbett argues against the hypothesis that IQ differences between blacks and whites are genetic. He notes that decades of research have not supported the assertion that one of the races in the United States is biologically inferior in terms of innate intelligence. Rather, he argues, “Whites showed better comprehension of sayings, better ability to recognize similarities and better facility with analogies — when solutions required knowledge of words and concepts that were more likely to be known to whites than to blacks.(an example would be an analogy using the word "yacht instead of boat") But when these kinds of reasoning were tested with words and concepts known equally well to blacks and whites, there were no differences. Within each race, prior knowledge predicted learning and reasoning, but between the races it was prior knowledge only that differed.”
so actually those tests that have equal black and white scores have 0% correlation with g
the tests that are the most g loaded have the highest black-white IQ gap