Michael D. Robinson, PhD, is Professor of Psychology at North Dakota State University. He is associate editor of Emotion, the motivation/emotion section of Social and Personality Psychology Compass, and the Journal of Personality and Social Psychology. Dr. Robinson's research focuses on the areas of personality, cognition, and emotion.

Edward R. Watkins, PhD, CPsychol, is Professor of Experimental and Applied Clinical Psychology at the University of Exeter, United Kingdom, and Director of the Mood Disorders Centre and the Study of Maladaptive to Adaptive Repetitive Thought (SMART) Lab. Dr. Watkins has practiced as a cognitive-behavioral therapist for 20 years, specializing in depression. His research focuses on the experimental understanding of psychopathology in depression--with a particular focus on repetitive negative thought and rumination--and the development and evaluation of new psychological interventions for mood disorders, including randomized controlled trials of treatments targeting rumination in depression. Dr. Watkins is a recipient of the British Psychological Society's May Davidson Award for outstanding contributions to the development of clinical psychology within the first 10 years of his career.

Eddie Harmon-Jones, PhD, is Professor of Psychology at the University of New South Wales, Australia. A recipient of the Award for Distinguished Early Career Contributions to Psychophysiology from the Society for Psychophysiological Research, he is associate editor of Emotion. Dr. Harmon-Jones's research focuses on emotions and motivations, their implications for cognitive and social processes and behaviors, and their underlying neural circuits.