Michelle G. Craske, PhD, is professor of psychology and director of the Anxiety Disorders Behavioral Research Program at the University of California in Los Angeles.Dirk Hermans, PhD, is professor of psychology and director of the Center for the Psychology of Learning and Experimental Psychopathology in the Department of Psychology at the University of Leuven in Leuven, Belgium. Debora Vansteenwegen, PhD, is the research director of the Psychophysiology Laboratory at the Center for the Psychology of Learning and Experimental Psychopathology in the Department of Psychology at the University of Leuven in Leuven, Belgium.