Stages of Change or the Trans-Theoretical Model of Change is a theory of change developed by James O Prochaska and Carlo Di Clemente in 1984 that synthesizes numerous change theories into a biopsychosocial model. The theory posits that there are phases, or stages, of change that an individual can go through and moreover, that how long an individual spends in each phase varies. Recognizing which stage someone is at can help us generate useful and timely interventions.
The following video is an overview of the Trans-Theoretical Model of Change
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