Maartje Boer

THE COURSE OF PROBLEMATIC SMU 207 7 Table 7.1 Descriptive Statistics and Correlations of the Study Variables (n = 1,419) 1 2 3 4 5 6 7 T M / % SD Min. Max. r r r r r r r 1 Problematic SMU 1 1.129 1.494 0 8 2 1.293 1.616 0 9 3 1.152 1.464 0 9 4 1.065 1.431 0 9 2 SMU frequency 1 3.923 1.586 1.000 7.000 0.341*** 2 4.271 1.565 1.000 7.000 0.317*** 3 4.285 1.485 1.000 7.000 0.243*** 4 4.296 1.376 1.000 7.000 0.251*** 3 Life satisfaction 1 4.932 0.757 1.143 6.000 -0.282*** -0.098** 2 4.687 0.874 1.000 6.000 -0.310*** -0.089** 3 4.540 0.876 1.000 6.000 -0.306*** -0.044 4 4.476 0.884 1.000 6.000 -0.241*** -0.028 4 Self-esteem 1 3.946 0.685 1.200 5.000 -0.198*** -0.066 0.516*** 2 3.865 0.758 1.000 5.000 -0.270*** -0.109*** 0.628*** 3 3.757 0.738 1.000 5.000 -0.297*** -0.052 0.628*** 4 3.730 0.745 1.000 5.000 -0.180*** -0.032 0.593*** 5 Attention deficits 1 2.115 0.703 1.000 4.333 0.349*** 0.193*** -0.318*** -0.191*** 2 2.266 0.773 1.000 5.000 0.379*** 0.236*** -0.287*** -0.246*** 3 2.399 0.754 1.000 5.000 0.312*** 0.150*** -0.257*** -0.254*** 4 2.463 0.783 1.000 5.000 0.267*** 0.108** -0.199*** -0.214*** 6 Impulsivity 1 1.863 0.682 1.000 4.667 0.357*** 0.276*** -0.170*** -0.081** 0.656*** 2 1.926 0.745 1.000 5.000 0.357*** 0.264*** -0.201*** -0.167*** 0.683*** 3 1.947 0.678 1.000 5.000 0.308*** 0.200*** -0.178*** -0.168*** 0.624*** 4 1.934 0.650 1.000 4.000 0.241*** 0.172*** -0.085* -0.134*** 0.642*** 7 Social competence 1 4.401 0.628 1.800 5.000 -0.197*** 0.067 0.285*** 0.291*** -0.156*** -0.146*** 2 4.354 0.681 1.200 5.000 -0.108*** 0.117*** 0.208*** 0.253*** -0.148*** -0.166*** 3 4.322 0.700 1.000 5.000 -0.127*** 0.098** 0.303*** 0.360*** -0.185*** -0.214*** 4 4.352 0.675 1.200 5.000 -0.137** 0.211*** 0.275*** 0.308*** -0.115** -0.060 Notes. T = timepoint (i.e., wave); SMU = social media use; M = mean; Prop. = proportion; SD = standard deviation; Min. = minimum; Max. = maximum; r = pairwise correlation. Means and standard deviations are based on complete data. *** p < 0.001, ** p < 0.01, * p < 0.05.