The Transtheoretical Model

The Transtheoretical Model (TTM), also known as the Stages of Change Model, was developed in 1983 by Prochaska and DiClemente, coming out of their work comparing the experiences of smokers who were able to quit on their own and those who quit using professional treatment (Glanz & Rimer, 2005). They proposed that behavior change is not a single event but rather an ongoing process where individuals move through six stages: precontemplation, where people are not yet thinking of change; contemplation, where people are thinking about making change in the near future; preparation, where people intend to take action very soon and have been thinking of a plan; action, where people have made specific modification to their behavior; maintenance, where