The Mediating Role of Boredom and Mind Wandering in the Relationship Between Evolutionary Fitness and Tendency to Substance Use Among University Students

Background: Substance abuse promotes a sense of self-perceived evolutionary ability by stimulating the cortico-mesolimbic in the brain. Although the relationship between substance use and evolutionary fitness has been demonstrated, the role of mediating variables that may contribute to the relationship between self-perceived evolutionary fitness and substance use is not clear yet. Objectives: The present study aimed to examine the relationship between self-perceived evolutionary fitness and the tendency to substance use and the mediating role of boredom and mind wandering in this relationship. Patients and Methods: This correlational study was performed using structural equation modeling (SEM). The statistical population comprised of all students at state-run universities of medical sciences in Tehran. A sample of 200 students from Iran University of Medical Sciences was selected via convenience sampling. Results: A significant negative correlation was found between evolutionary fitness and addiction potential (r = -0.75). The proposed model showed the direct effect factor of evolutionary fitness on addiction potential (β = -0.50, t = 7.90), boredom (β = -0.71, t = -14.12), and mind wandering (β = -0.46, t = -7.28). Moreover, the direct effect factor of boredom (β = 0.37, t = 5.94) and mind wandering (β = -0.02, t = -0.47) for addiction potential was established. Conclusions: Poor evolutionary fitness starts mind wandering about fitness-related issues. Eventually, this wandering leads to the unpleasant sense of boredom. Taking drugs artificially and temporarily increases evolutionary fitness and reduces one’s sense of boredom.