The Transtheoretical Model of Change is a psychological framework that outlines the stages individuals go through when changing a behavior. It consists of five stages: Precontemplation, Contemplation, Preparation, Action, and Maintenance. This model helps to understand how people progress through these stages and the factors that influence their readiness to change. Each stage represents a different level of awareness and commitment to change. For example, in the Precontemplation stage, individuals may not recognize the need for change, while in the Action stage, they actively implement new behaviors. This model is widely used in health promotion and behavioral therapy.