Leslie Greenberg, PhD, is Distinguished Research Professor Emeritus of Psychology at York University and the developer of Emotion-Focused Therapy (EFT). His recent books include Emotion-Focused Therapy of Forgiveness and Changing Emotion with Emotion. He has received the Distinguished Research Career award of the International Society for Psychotherapy Research and both the Carl Rogers and the Distinguished Professional Contribution to Applied Research of the American Psychology Association. He is a past President of the Society for Psychotherapy Research.