Fear of missing out and fear of not being up to date: investigating different pathways towards social and process problematic smartphone use

The present study introduces a new construct potentially associated with problematic smartphone use, that is the fear of not being up to date, and tests two serial mediation models, in which it was hypothesised that: (i) metacognitions and social smartphone use would be serial mediators of the relationship between the fear of missing out (FoMO) and problematic smartphone use (PSU); and (ii) metacognitions and process smartphone use would be serial mediators of the relationship between and the fear of not being up to date and PSU. A sample of 364 participants (F = 72.8%; mean age = 36.80 +/- 15.32 years; age range: 18-75 years), recruited online, were administered a battery of self-report measures assessing FoMO, the fear of not being up to date, metacognitions about smartphone use, process and social smartphone use, and PSU. The serial mediation effect of metacognitions about smartphone use and process use on the relationship between the fear of not being up to date and PSU was significant (indirect effect = 0.004; 95% CI: [0.0006, 0.009]). Conversely, the serial mediation effect of metacognitions about smartphone use and social use on the relationship between FoMO and PSU was not significant (indirect effect = 0.002; 95% CI: [-0.003, 0.009]). Smartphone social use did not predict PSU. The current study highlights a possible pathway towards process smartphone use via a relatively new phenomenon termed "fear of not being up to date" within a metacognitive framework.