In regards to your race statement, I agree with your intent, but it's not really race; it's about social and cultural perceptions of race. Thirty years ago thi

In regards to your race statement, I agree with your intent, but it's not really race; it's about social and cultural perceptions of race. Thirty years ago things were very different for inter-racial families than they are now, and that varies fairly widely based on area. If they don't include the areas in which the subjects lived, their dataset is critically flawed. My sister and I are both adopted, and she was adopted from Korea at around 6 months. She was an honor student every year she was in high school in Maryland, and she was just one of the girls; she was never treated any differently than anyone else because of her race. (At least, not that any of us noticed.) We moved to Colorado, and her school performance took a hit. This was partially due to her being one of the only asians in her school, and standing out because of it. A wonderful example is how a pair of her peers bought her a bag of rice for her birthday. (I wish I was joking.) The social effects of her race impacted her school performance. In my case, I've found out that my birth brothers aren't as successful or as educated as I've been. All three of us have ADHD, and all the problems that come with it, so it's not just biology. In my (very biased) experience, we start out with a baseline derived from our genetics; our chemical imbalances and natural aptitudes. The positives and negatives of those are modified from the baseline by our upbringing, parents, and education. Then our social experiences shift that even further in one way or another. Anyway, this study is useless on its own. If they did a comparison against Korean families adopting Koreans, and compared that to white families adopting whites, they'd have something useful. They MIGHT be able to successfully identify how much of the difference is related to adoption, and how much is related to race. As is, it's an interesting but worthless data point.