Maartje Boer

CHAPTER 4 114 Table 4.2 Model Comparisons Model a b c d e f g intense + problematic SMU fixed a + random slope intense SMU b + random slope problematic SMU c + intense SMU * country prevalence intense SMU d + intense SMU * country prevalence problematic SMU e + problematic SMU * country prevalence intense SMU f + problematic SMU * country prevalence problematic SMU Free parameters 18 20 22 23 24 25 26 Mental wellbeing M1. Life satisfaction AIC 616143.1 616075.3 616026.6 616002.8 616004.8 616005.3 616004.8 BIC 616322.2 616274.3 616245.6 616231.7 616243.6 616254.1 616263.6 u1 j 0.011 0.010 0.002 0.002 0.002 0.002 u2 j 0.033** 0.034** 0.034** 0.031** 0.028** M2. Psychological complaints AIC 430895.9 430807.2 430730.0 430723.3 430723.9 430724.2 430724.2 BIC 431075.0 431006.3 430948.9 430952.2 430962.7 430973.0 430983.0 u1 j 0.005** 0.005** 0.003** 0.003** 0.003** 0.003** u2 j 0.013* 0.013* 0.013* 0.012* 0.011* School wellbeing M3. School satisfaction AIC 383871.5 383805.0 383745.5 383747.5 383747.2 383748.9 383750.8 BIC 384050.7 384004.0 383964.4 383976.4 383986.0 383997.7 384009.5 u1 j 0.002** 0.002** 0.002** 0.002** 0.002** 0.002** u2 j 0.007** 0.007** 0.007** 0.007** 0.007** M4. Perceived school pressure AIC 399668.6 399615.8 399546.0 399548.0 399549.6 399547.8 399549.3 BIC 399847.7 399814.9 399764.9 399776.8 399788.4 399796.6 399808.0 u1 j 0.002* 0.002* 0.002* 0.002** 0.002** 0.002** u2 j 0.012 0.012 0.012 0.010 0.010 Social wellbeing M5. Family support AIC 597242.9 597185.1 597172.6 597159.2 597158.8 597160.7 597158.6 BIC 597422.1 597384.1 597391.5 597388.1 597397.6 597409.5 597417.4 u1 j 0.009** 0.009** 0.004* 0.003* 0.003* 0.003* u2 j 0.012* 0.012* 0.012* 0.012* 0.009* M6. Friend support AIC 597587.5 597504.2 597495.2 597485.3 597484.8 597486.7 597480.0 BIC 597766.6 597703.2 597714.1 597714.1 597723.6 597735.5 597738.8 u1 j 0.012** 0.012** 0.007* 0.006 0.006 0.006 u2 j 0.009 0.009 0.009 0.009 0.006 Notes. SMU = social media use; u 1 j = slope variance intense SMU; u 2 j = slope variance problematic SMU. Boldface AIC and BIC denote the lowest row values; Dark grey cells denote the models that were selected as final models for model interpretation. * p < 0.05; ** p < 0.01; *** p < 0.001.