In other words, the gap in test scores appears to be completely cultural and nurture over nature.
For the paper, visit here.
What strikes me about much of the racist pap I encounter is that it is very, very similar to the way women were portrayed a hundred years ago. People laughed at Brigham Young when he said women were as fit to be lawyers, accountants, politicians and doctors as men. He was derided for emphasizing the need to educate women. Yet now:
Of which, one of the most important cultural input may be religion: "youth with religiously active parents are less affected later in life by childhood disadvantage than youth whose parents did not frequently attend religious services."