The Transtheoretical Model (TTM), also known as the Stages of Change Model, was developed by James Prochaska and Carlo DiClemente in the late 1970s. This model is widely regarded as the prevailing paradigm for elucidating the mechanisms through which behavioral modifications occur.
The Transtheoretical Model (TTM) places emphasis on the decision-making process of the individual and is regarded as a model of intentional change. The TTM operates under the assumption that individuals do not rapidly and definitively alter behaviors. Instead, it proposes that behavioral change, particularly habitual behavior, occurs continuously through a cyclical process.
The TTM delineates six distinct stages of change: precontemplation, contemplation, preparation, action, maintenance, and termination. The efficacy of intervention strategies is thought to vary across these stages, with strategies designed to promote transition to the subsequent stage of change proving most effective.