Discussion
The present study used the problem behavior theory (PBT) framework to examine among high school and university students how cyberbullying perpetration (CBP) and problematic social media use (PSMU) are associated with each other and to gender, age, depression, self-esteem, self connectedness (SC), and general belongingness (GB). According to model results, which were partially in line with the PBT, PSMU was (i) directly related to being female, being younger (only among university students sample), GB, and depression, and (ii) indirectly to self-esteem, SC, and GB via depression. Furthermore, CBP was (i) directly related to being male, being younger, GB, and PSMU, and (ii) indirectly to being male, being younger, GB, and depression via PSMU. Nevertheless, it should be emphasized that the majority of these associations, although significant, were relatively weak. Therefore, other factors—not included in the present study—are likely to play an important role in PSMU and CBP and need to be investigated in future studies. As expected, adolescents and young adults who demonstrated higher PSMU also showed higher CBP. This finding concurs with previous studies reporting that online problem behaviors such as problematic and addictive use of Internet and CBP are related (e.g., Casas et al. 2013; Eksi 2012; Gámez-Guadix et al. 2016; Kırcaburun and Baştug 2016) and is also consistent with PBT (Jessor 1991). When all these studies are considered together, there is supporting evidence that PBT is able to explain the risky online and offline behaviors of students. This finding is important because it presents evidence that lowering PSMU may be used as an intervention method in order to prevent students from engaging in CBP. Although the results of the present study suggests that university students’ problem online behaviors may be explained by the PBT, it should also be emphasized that, as expected, adolescent students’ CBP was related more strongly with their PSMU when compared to university students. However, this may be due to the fact that PBT was originally proposed for adolescents.