There's an idea out there of what a drug-addled teen is supposed to look like: impulsive, unconscientious, smart, perhaps -- but not the most engaged. While personality traits like that could signal danger, not every adolescent who fits that description becomes a problem drug user. So how do you tell who's who? There's no perfect answer, but researchers report in Nature Communications that they've found a way to improve our predictions -- using brain scans that can tell, in a manner of speaking, who's bored by the promise of easy money, even when the kids themselves might not realize it. According to a recent article in ScienceDaily , that conclusion grew out of a collaboration between a professor of psychology at Stanford, and a professor of medicine at Universitätsklinikum Hamburg Eppendorf. With support from the Stanford Neurosciences Institute's NeuroChoice program, the pair started sorting through an intriguing dataset covering, among...