The Stages of Change model, also known as the Transtheoretical Model, is a framework that’s often used in psychotherapy to understand how people make changes to their behavior.

Lastly, based on this model of behavior change, a person's ability to make lasting behavior changes can be summarized in the following formula: (Forces promoting and sustaining change.

Changing a behavior, such as following through on a New Year’s resolution, is not a simple, linear process. Behavior change is complicated and complex because it requires a person to disrupt a current ...