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Abstract
Self-efficacy expectations are important psychological determinants of smoking cessation. The present study aimed at exploring different sorts of self-efficacy. The following self-efficacy scales were composed: Emotional self-efficacy, Social self-efficacy, Skill self-efficacy, Relapse self-efficacy and Try self-efficacy. In a sample of 752 smokers with low motivation to quit, two subsequent self-report measurements of self-efficacy were conducted. Firstly, we investigated to what extent potential sources of self-efficacy - quitting history and smoking behavior -were related to the types of self-efficacy. The explained variance in self-efficacy scores ranged from 4.4% to 23.1%, and in all five types of self-efficacy, smoking behaviour explained a higher percentage of self-efficacy than quitting history. The number of past quit attempts was only related to Relapse self-efficacy. Secondly, we investigated to what extent the different types of self-efficacy at T1 were predictive of quitting behavior measured at T2. The results showed that only Skill self-efficacy was predictive of quitting activity between Tl and T2. Point prevalence quitting at T2 was predicted by Skill self-efficacy and Relapse self-efficacy. The latter type of self-efficacy, however, was a negative predictor of quitting. The different types of self-efficacy can be mapped on two dimensions: The extent to which the means to accomplish a certain task are specified in the questionnaire item; and the phase of behavior change to which the self-efficacy tasks are relevant. Based on the findings from the predictive validity, it is concluded that the more clearly the means to accomplish the task are specified, the more valid the self-efficacy judgements are.