Which of the following stages is NOT part of the stages of change model?

The stages of change model, also known as the Transtheoretical Model, outlines different phases individuals typically move through in the process of behavior change. These stages include precontemplation, contemplation, preparation, action, and maintenance.

In this context, the selection of "detachment" as the answer is appropriate because it is not recognized as a formal stage within the model. Each of the other terms—contemplation, preparation, and action—represents specific steps in the change process, where contemplation involves recognizing a problem and considering change, preparation entails planning for the change, and action is the implementation of the new behavior.

Detachment does not align with the established stages, which focus on movement towards change rather than a state of separation or distancing from a behavior or situation. Thus, it is accurate to say that "detachment" is not part of the stages of change model.