Rushton's assertion that there was some genetic influence is still not clearly answered with this article, simply dismissed. It is clear that environmental var

Rushton's assertion that there was some genetic influence is still not clearly answered with this article, simply dismissed. It is clear that environmental variables affect g-loaded test scores (one example showed that black children raised in white households test higher than black children raised in black households on average) almost always related to family income, but there is still a weird small percentage that just can't be explained away. That is the genetic factor that Ruston and others believe exist. For example, white and black children raised from birth in the same household (predominantly white or black household, either one) have this weird gap where the white kids test better on g-loaded assessments. SAT scores are positively correlated to g-loaded test assessments. The College Board's 2005 SAT data shows a 10 point combined advantage for white kids with family income under $10,000 over black kids with family income over $100,000! I have no idea the reason behind that leftover unexplained gap. I have never read an article from the genetic or environmental side that adequately explained it in context of the obvious difference that environment makes.