Joseph P. Forgas received his DPhil and subsequently a DSc from the University of Oxford. He is currently Scientia Professor Psychology at the University of New South Wales, Sydney, Australia. He has also spent various periods of time working at the Universities of Giessen, Heidelberg, Stanford, Mannheim, and Oxford. His enduring interest is in studying the role of cognitive and affective processes in interpersonal behavior. His current projects investigate how mood states can influence everyday social judgments and interaction strategies. He has published some 17 books and more than 130 articles and chapters in this area. He has been elected Fellow of the Academy of Social Sciences in Australia, the Hungarian Academy of Sciences, the American Psychological Society, and the Society for Personality and Social Psychology. He is recipient of the Alexander von Humboldt Research Prize (Germany), a Special Investigator Award, and a Professorial Research Fellowship from the Australian Research Council. Martie G. Haselton received her PhD in Psychology in the year 2000 from the University of Texas, Austin. She is currently Associate Professor of Communication Studies and Psychology at the University of California, Los Angeles. She serves as co-editor in chief at Evolution and Human Behavior, board member of the UCLA Center for Behavior, Evolution, and Culture, associate director of the NSF-funded Interdisciplinary Relationship Science Program at UCLA, and elected member at large of the Human Behavior and Evolution Society. She has dozens of scientific publications on bias in social judgment, psychological changes in women across the ovulatory cycle, and the evolution of human mate choice and sexuality. William von Hippel received his BA from Yale University, and his PhD from the University of Michigan. He taught at Ohio State University for 11 years prior to coming to the University of New South Wales in 2001. He has over 50 publications and served as Associate Editor of Psychological Science and Personality and Social Psychology Bulletin. His main research areas include social cognitive aging, executive functioning, and evolutionary psychology.