Dr. Carl L. Hart is a psychologist and neuroscientist who specializes in the behavioral and neuropharmacological effects of psychoactive drugs in humans. Currently, he is a professor of Psychology in Psychiatry at Columbia University. In addition to numerous academic articles, Hart has published two books, "High Price" and "Drug Use for Grown-Ups." He co-authored, editions of the textbook, "Drugs, Society, and Human Behavior." Hart received his Ph.D. in Neuroscience from the University of Wyoming.