List of figures; List of tables; List of sidebars; List of contributors; 1. Changing behavior: a theory and evidence based approach; Part I. Theory and behavior change: 2. Changing behavior using the theory of planned behavior; 3. Changing behavior using social cognitive theory; 4. Changing behavior using the health belief model and protection motivation theory; 5. Changing behavior using the common sense model of self-regulation; 6. Changing behavior using the model of action phases; 7. Changing behavior using the health action process approach; 8. Changing behavior using self-determination theory; 9. Changing behavior using control theory; 10. Changing behavior using the transtheoretical model; 11. Changing behavior using integrative self-control theory; 12. Changing behavior using the reflective-impulsive; 13. Changing behavior using habit theory; 14. Changing behavior by changing environments; 15. Changing behavior using integrated theories; 16. Changing behavior using social identity processes; 17. Changing behavior using ecological models; 18. Changing behavior using theories at the interpersonal, organizational, community and societal levels; Part II. Using theory to change behavior: 19. Design, implementation, and evaluation of behavior change interventions: A ten-task guide; 20. Moving from theoretical principles to intervention strategies: An experimental medicine approach; 21. Developing behavior change interventions; 22. Evaluation of behavior change interventions; 23. Implementation science and translation in behavior change; 24. Engagement of stakeholders in the design, evaluation, and implementation of complex interventions; 25. Maximizing user engagement with behavior change interventions; 26. Cost effectiveness evaluations of behavior change interventions; 27. Addressing underserved populations and disparities in behavior change; 28. Behavior change in community contexts; 29. Changing behavior in the digital age; 30. Critical and qualitative approaches to behavior change; Part III. Using theory to change behaviour: 31. Attitudes and persuasive communication; 32. Self-efficacy interventions; 33. Imagery, visualization and mental simulation; 34. Affect-based interventions; 35. Autonomy-supportive interventions; 36. Incentive-based interventions; 37. Monitoring interventions; 38. Goal setting interventions; 39. Planning and implementation intention interventions; 40. Self-control interventions; 41. Habit interventions; 42. Economic and behavioral economic approaches to behavior change; 43. Dyadic behavior change interventions; 44. Social identity interventions; 45. Motivational interviewing interventions; 46. The science of behavior change: The road ahead.