Michael B. Frisch, PhD, is a clinical and positive psychologist and professor at Baylor University, Department of Psychology and Neuroscience. He is the author of the Quality of Life Inventoryr, one of the best-validated and most widely used measures in the field. He has been honored as Research Fellow and Founding Fellow by the prestigious International Society for Quality of Life Studies as well as Aaron T. Beck's Academy of Cognitive Therapy. With Forewords by Ed Diener, PhD, Distinguished Professor of Psychology, University of Illinois; Senior Research Scientist, Gallup International Positive Psychology Center; and past president, International Society of Quality of Life Studies; and… David A. Clark, PhD, Professor of Psychology, University of New Brunswick, and Founding Fellow, Academy of Cognitive Therapy.