The present study used meta‐analysis to evaluate the role of self‐identity in the theory of planned behavior (TPB). Altogether, 40 independent tests (N = 11607) could be included in the review. A large, sample‐weighted average correlation between self‐identity and behavioral intention was observed (r+ = .47). Multiple regression analyses showed that self‐identity explained an increment of 6% of the variance in intention after controlling for the TPB components, and explained an increment of 9% of the variance when past behavior and the TPB components were controlled. The influence of self‐identity on behavior was largely mediated by the strength of behavioral intentions. Theoretical implications of the findings are discussed.

A study was conducted to explore (a) the dimensional structure of perceived behavioural control (PBC), (b) the conceptual basis of perceived difficulty items, and (c) how PBC components and instrumental and affective attitudes, respectively, relate to intention and behaviour. The material stemmed from a two-wave study of Norwegian graduate students (N = 227 for the prediction of intention and N = 110 for the prediction of behaviour). Data were analysed using confirmatory factor analysis (CFA) and multiple regression by the application of structural equation modelling (SEM). CFA suggested that PBC could be conceived of as consisting of three separate but interrelated factors (perceived control, perceived confidence and perceived difficulty), or as two separate but interrelated factors representing self-efficacy (measured by perceived difficulty and perceived confidence or by just perceived confidence) and perceived control. However, the perceived difficulty items also overlapped substantially with affective attitude. Perceived confidence was a strong predictor of exercise intention but not of recycling intention. Perceived control, however, was a strong predictor of recycling intention but not exercise intention. Affective attitudes but not instrumental attitudes were identified as substantial predictors of intentions. The findings suggest that at least under some circumstances it may be inadequate to measure PBC by means of perceived difficulty. One possible consequence may be that the role of PBC as a predictor of intention is somewhat overestimated, whereas the role of (affective) attitude may be similarly underestimated.

A two-dimensional model on escape motives in activity engagement was developed in three studies. We suggested that motivation to escape the self through engagement in an activity partly derives from intentions to either prevent negative affect or to promote positive affect. A scale for measuring these intentional mindsets was developed consisting of the subcategories self-suppression and self-expansion. Results showed that the dimensions were differently related to psychological predictors, outcomes, and experiences in the activity engagement. We argue that the present research introduces escapism as a relevant theoretical and empirical concept applicable to several types of activity engagements.

The results indicate that affective attitude and descriptive norm play a more crucial role than the other TPB predictors in motivating smokers to quit. The results also indicate that self-regulatory strategies are important in relation to addictive behaviours.

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This study examined the ability of the theory of planned behavior (TPB)to predict students' intentions to quit smoking and the subsequent behavior6 months later. In addition, the impact of past behavior, moral norms, self‐identity, group identity, and positive/negative anticipated affect was examined. The intention‐behavior relationship was examined by dividing the sample in four subgroups: inclined actors/abstainers and disinclined actors/abstainers. Analyses were based on data from a prospective sample of 698 smokers. Attitude, subjective norms, and perceived behavioral control accounted for 36% (adjusted R2) of the variance in intentions. Moral norms, positive anticipated affect, group identity, and past behavior added 9% (adjusted R2) to the explained variance in intention, beyond the effect accounted for by the TPB components. Subsequent behavior was predicted by intentions (adjusted R2= .12). Past behavior, moral norms, self‐identity, and the Past Behavior x Intention and Moral Norm x Negative Affect interactions explained an additional 9% (adjusted R2) of the variance in behavior. Inclined abstainers constituted the main source of the discrepancy between intention and behavior.

The usefulness of measuring implementation intentions in the context of the theory of planned behavior (TPB) was explored among 112 Norwegian college students. They responded to a questionnaire measuring past behavior, perceived behavioral control, behavioral intentions, implementation intentions, and actual performance of regular exercising and recycling of drinking cartons. Implementation intentions were measured using five items relating to recycling and four items relating to exercise, which showed satisfactory internal consistencies. Consistent with the main prediction, the presence of implementation intentions was related to performing the two behaviors, although behavioral intentions were the strongest determinant for both behaviors. The results suggest that the TPB may benefit from inclusion of the concept of implementation intentions to provide a more complete understanding of the psychological process in which motivation is translated into action.

The present paper challenges the notion that engagement in leisure activities is exclusively conducive to well-being. By applying the Dualistic Model of Passion in a leisure context on 467 participants, the measurement of obsessive passion for a leisure activity was related to indicators of ill-being and unrelated to general well-being. In Study 1, obsessive passion for a leisure activity was associated with activity addiction, escapism engagement, and intrapersonal conflicts. In Study 2, obsessive passion was negatively related to basic need satisfaction in activity engagement as well as positively related to negative affective outcomes from activity engagement. We argue that the present findings may lead towards a broader understanding of motivation and outcomes in leisure activities.