Leslie S. Greenberg, PhD, is Professor in the Department of Psychology and Director of the Psychotherapy Research Center at York University in Canada. Coauthor of Facilitating Emotional Change; Emotionally Focused Therapy for Couples; and Emotion in Psychotherapy, he has coedited numerous volumes including Emotion, Psychotherapy, and Change; Empathy Reconsidered; and The Working Alliance. Past President of the International Society for Psychotherapy Research, Dr. Greenberg maintains a private practice in Toronto.