Do smartphones and social network sites become more important when experiencing stress? Results from longitudinal...

Previous research on stress and media use mainly concentrated on between-person effects. We add to this research field by additionally assessing within-person associations, assuming that experiencing more stress than usual goes along with more nomophobia ("no-mobile-phone phobia") and more passive and active Facebook use than usual, cross-sectionally and over time, and by exploring potential age differences. We conducted a secondary analysis of three waves of a representative multi-wave survey of adult Dutch internet users (N = 861). Specifically, we used two subsamples: (1) smartphones users for the analyses on nomophobia (n = 600) and (2) Facebook users for the analyses on social media (n = 469). Employing random-intercept cross-lagged panel models, we found within-person correlations between nomophobia and stress at one time-point, but not over time. For the younger age group (18-39 years), more passive Facebook use than usual was associated with more stress than usual six months later, and more stress than usual was followed by less passive Facebook use six month later. There were no longitudinal relationships for active Facebook use across the different age groups. Methodological and theoretical implications are discussed.