Transtheoretical model of change

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The transtheoretical model of change explains or predicts a person's success or failure in achieving a a proposed change in habits. It attempts to answer why the change "stuck" or alternatively why the change was not made.

[edit] Petersen's Model

Petersen's model stipulates six stages:

Precontemplation - lack of awareness that life can be improved by a change in behavior;
Contemplation - recognition of the problem, initial consideration of behavior change, and information gathering about possible solutions and actions;
Preparation - introspection about the decision, reaffirmation of the need and desire to change behavior, and completion of final pre-action steps;
Action - implementation of the practices needed for successful behavior change (e.g. exercise class attendance);
Maintenance - consolidation of the behaviors initiated during the action stage;
Termination - former problem behaviors are no longer perceived as desirable (e.g. skipping a run results in frustration rather than pleasure). [1]