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Martin Seligman is Fox Leadership Professor of Psychology in the Department of Psychology at the University of Pennsylvania. His research is on positive psychology, learned helplessness, depression, and on optimism and pessimism. He is the author of twenty books and over 200 articles on motivation and personality. Among his better-known works are Learned Optimism (Knopf, 1991), What You Can Change & What You Can't (Knopf, 1993), The Optimistic Child (Houghton Mifflin, 1995), Helplessness (Freeman, 1975, 1993) and Abnormal Psychology (Norton, 1982, 1988, 1995, with David Rosenhan. His most recent book is the best-selling, Authentic Happiness (Free Press, 2002). His articles have appeared in both scholarly publications as well as the New York Times, Time, Newsweek, U.S. News and World Report, Reader's Digest, Redbook, Parents, Fortune, Family Circle, USA Today. Seligman is the recipient of numerous distinguished awards. Since 2000 his main mission has been the promotion of the field of Positive Psychology. This discipline includes the study of positive emotion, positive character traits, and positive institutions. As the science behind these becomes more firmly grounded, Dr. Seligman is now turning his attention to training Positive Psychologists, individuals whose practice will make the world a happier place, in a way that parallels clinical psychologists having made the world a less unhappy place.