Prochaska and DiClemente

Prochaska and DiClemente developed the Transtheoretical Model of Change, which outlines the stages people go through when making a significant change in their behavior, such as quitting smoking or losing weight. These stages include: Precontemplation (not yet thinking about change), Contemplation (considering change), Preparation (planning for change), Action (actively making changes), and Maintenance (sustaining changes over time). Understanding these stages helps in creating effective strategies for behavior change, recognizing that change is often a process and not a simple event.