For some kids, genes ruling behavior

After years of ignoring those children [environmentally resistant outliers], a few scientists now realize that they are telling us something that promises to revolutionize our understanding of child development. In an echo of "personalized medicine" (matching drugs to people's DNA), scientists are finding that how parents treat their children is filtered through the prism of DNA. Parents may intuit that, as they notice that what worked with one child is failing abysmally with another, but now science is pinpointing exactly what combinations of nature and nurture spell gridlock. It is finally dawning on experts that "individual genetic differences are the 800-pound gorilla of child development," says Jack Shonkoff, director of the Center on the Developing Child at Harvard University. "The promise of genomics is that you will be able to tailor experiences as we tailor drugs."