“…Taking together all the premises, this study was aimed at investigating a possible mechanism through which TB, PFU, and SB are related. A simple mediation model was hypothesised and tested, predicting that a) TB would be positively related to PFU, in line with previous studies with adolescents regarding unhealthy behaviours (Bai et al, 2021;Biolcati et al, 2018;Chou et al, 2018;Hong et al, 2020;Weybright et al, 2015) and with adults concerning Facebook use (Caci et al, 2014); b) that PFU, in turn, would be positively associated with SB, consistent with the relationship between PFU and psychological distress (e.g., Demirci et al, 2020;Marino et al, 2018), among which high levels of SB can be considered (Chao et al, 2020;Tutzer et al, 2020); c) that PFU would be a mediator of the positive relationship between TB and SB (Mercer-Lynn et al, 2014), predicting that a high individual sensitivity to boredom may enhance the likelihood of employing Facebook excessively and in addictive way and that, in turn, PFU may enhance adolescents' situational experience of boredom.…”