Quoted: “Probably at best, it tells us something about the white, probably better-educated, somewhat higher-income population in the U.S., which is a population we know a fair amount about already,” says sociologist John DeLamater of the University of Wisconsin-Madison. “What we really, really need are studies that look at these diverse groups in the U.S. That would go a long way in addressing the whole issue of ?normal.? “