iv About the Authors Textbook Authors Catherine A. Sanderson is the James E. Ostendarp Professor of Psychology at Amherst College, Amherst, Massachusetts. She received a bachelor’s degree in psychology, with a specialization in health and development, from Stanford University, and received both a master’s and a doctoral degree in psychology from Princeton University. Professor Sanderson’s research examines how personality and social variables influence health-related behaviors, such as safer sex and disordered eating. She also studies the development of persuasive messages, interventions to prevent unhealthy behavior, and the predictors of relationship satisfaction. Professor Sanderson’s research has received grant funding from the National Science Foundation and the National Institutes of Health. She has published over 25 journal articles and book chapters in addition to three college textbooks and a popular-press book on parenting. In 2012, she was named one of the country’s top 300 professors by the Princeton Review. Mark Zelman is an Associate Professor of Biology at Aurora University, Aurora, Illinois. He received a bachelor’s degree in biology at Rockford College, with minors in chemistry and psychology. He received a PhD in microbiology and immunology at Loyola University of Chicago, where he studied the molecular and cellular mechanisms of autoimmune disease. During his postdoctoral research at the University of Chicago, he studied aspects of cell physiology pertaining to cell growth and cancer. Dr. Zelman supervises undergraduate research on streptococcal and staphylococcal infections, and mechanisms of antibiotic resistance. He also teaches in the science education graduate program for biology and chemistry high school teachers. He has published articles on microbiology, infectious disease, autoimmune disease, and biotechnology, and he has written two college texts on human diseases and infection control. Dr. Zelman is an officer of the Illinois State Academy of Sciences.