Which stage of the transtheoretical model involves making a change in behavior?

In the transtheoretical model, the Action stage is characterized by individuals actively implementing new behaviors and making significant changes to their lifestyle. This is where a person moves from intention and planning to tangible efforts aimed at altering their habits or routines. During this stage, individuals are engaged in activities that reinforce the desired behavior change, demonstrating a commitment to adopting a healthier lifestyle.

In contrast, the Pre-contemplation stage involves individuals not yet considering change, perhaps unaware of the need for it or feeling resistant. The Contemplation stage follows, where individuals recognize the need to change and begin to think about it but have not yet made any substantial behavioral alterations. Finally, the Maintenance stage refers to sustaining the changed behavior over time to prevent relapse. The focus here is on maintaining the gains and integrating the new behavior into one’s life long-term. Thus, the Action stage is critical as it represents the phase where change actually takes place, making it the correct answer.