This student-friendly introduction to the field focuses on understanding social and practical problems and developing intervention strategies to address them. Offering a balance of theory, research, and application, the updated Third Edition includes the latest research, as well as new, detailed examples of qualitative research throughout. The book begins with separate chapters that define the field, examine social psychological theory, review research methods, and consider the design and evaluation of interventions. Subsequent content chapters focus on the application of social psychological theory and knowledge to such areas as counselling, sports, media, health, education, organizations, criminal justice, community, environment, and diversity.