The example given describes an individual who successfully quits smoking immediately upon deciding to do so. This action demonstrates the person's conviction in their capacity to reach a particular objective: abstaining from smoking.
The following are distinct psychological concepts:
The highlighted concept in the scenario of deciding to quit smoking and succeeding is self-efficacy. This is due to self-efficacy's definition as an individual's confidence in their ability to perform the actions needed to achieve particular results, such as smoking cessation.