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The main purpose of the present thesis was to examine (i) the role of psychological processes in quitting addiction, and (ii) the psychological processes which play a role in the development of obsessive smoking passion. Although the thesis focuses on smoking behaviour in particular, the underlying theoretical ideas should be applicable to all forms of strong attachments.
There are five research questions which are central to the present thesis. First, papers 1, 3, and 5 examined the role of motivational processes in the formation of intention to quit smoking. Second, papers 1, 2, and 5 examined the role of important motivational and self-regulatory processes in self-reported quitting behaviour. Third, papers 1, 2, and 3 examined the role of future time perspective and time construal in the formation of intention to quit smoking, and in self-reported smoking cessation. Fourth, in papers 4 and 5 we attempted to develop a measure to assess explicit cognition in relation to strong attachments. And fifth, in paper 5 we attempted to examine the interplay of automatic and cognitive processes in the development of obsessive passion for smoking.
The main theoretical reasoning chosen to illuminate these research questions was derived from several theoretical frameworks. First, the general ideas which underlie the majority of so-called social cognition models were used in order to examine the role of motivational and self-regulatory processes in smoking cessation. In particular, the theory of planned behaviour (TPB) was applied in papers 1, 3, and 5 with the aim of obtaining a better understanding of the processes which facilitate the development of intention to quit smoking and smoking cessation. Second, the ideas which accentuate the role of automatic processing were used in order to understand the stability of addictive attachments. Third, detectable in several papers was the influence of ideas derived from behavioural economics in general and time-discounting theories in particular, in relation to addictive behaviours. And finally, the theoretical influence of self-regulatory literature in general, with particular focus on the delay of gratification paradigm and Action Identification theory, played an important role in the conceptualization of the MR construct (paper 4 and 5).
The thesis is based on questionnaire data from three different studies. The first two data collections included a student population, while papers 4 and 5 were based on internet surveys and included a more general population. All three surveys were longitudinal with 4, 6, and 4 months between measurement points, respectively.
With regard to the quitting process, the results imply that present accounts of smoking cessation in terms of motivational and self-regulatory processes are insufficient. This is indicated by the low percentage of explained variance in quitting behaviour and the relatively low predictive values of the most important variables in the model in comparison to the meta-analysis of studies on non-addictive behaviours. Thus, it seems that motivational and self-regulatory efforts are particularly unstable when it comes to addictive behaviours such as smoking. However, the results also indicate that the predictions of intention to quit smoking in terms of motivational processes are reasonably well understood, in that the explained variance in quitting intentions was in line with previous findings in the health behaviour domain. The results also indicate that the concept of time is important in both the motivational and self-regulatory phases. For instance, in study 2 we examined the moderating effects of two measures of future orientation (Consideration of Future Consequences scale and Stanford Time Perspective Inventory) on the relation between intention, planning, and past behaviour on one hand, and quitting smoking on the other.