Author Ed Sarafino draws from the research and theory of many disciplines in order to show how psychology and health affect each other. Health Psychology: Biopsychsocial Interactions has been updated to include new research and data throughout, including new discussions on health care systems. Additionally, international examples are included to broaden the psychologist's view of health issues around the world and highlight what works in the field. The psychological research cited in the text supports a variety of behavioral, physiological, cognitive, and social/personality viewpoints. Sarafino integrates a focus on lifespan development in health and illness throughout the text.