Maartje Boer

SMU AND ADHD-SYMPTOMS 145 5 Table 5.6 RI-CLPM, (Residual) Correlations Within Waves (n = 543) (T1 →) SMU intensity SMU problems Attention deficits Impulsivity Correlations (T1 ↓) r SE p r SE p r SE p r SE p SMU intensity 1.00 SMU problems 0.38 0.10 < 0.001 1.00 Attention deficit 0.26 0.08 0.001 0.42 0.09 < 0.001 1.00 Impulsivity 0.40 0.08 < 0.001 0.55 0.10 < 0.001 0.69 0.06 < 0.001 1.00 Hyperactivity 0.40 0.07 < 0.001 0.31 0.10 0.002 0.50 0.08 < 0.001 0.63 0.06 < 0.001 (T2 →) SMU intensity SMU problems Attention deficits Impulsivity Residual correlations (T2 ↓) r SE p r SE p r SE p r SE p SMU intensity 1.00 SMU problems 0.43 0.10 < 0.001 1.00 Attention deficit 0.16 0.15 0.295 0.44 0.07 < 0.001 1.00 Impulsivity 0.25 0.15 0.089 0.46 0.07 < 0.001 0.64 0.07 < 0.001 1.00 Hyperactivity 0.39 0.14 0.007 0.40 0.05 < 0.001 0.57 0.06 < 0.001 0.53 0.07 < 0.001 (T3 →) SMU intensity SMU problems Attention deficits Impulsivity Residual correlations (T3 ↓) r SE p r SE p r SE p r SE p SMU intensity 1.00 SMU problems 0.06 0.10 0.575 1.00 Attention deficit -0.11 0.19 0.574 0.12 0.11 0.256 1.00 Impulsivity -0.07 0.13 0.586 0.17 0.07 0.022 0.51 0.08 < 0.001 1.00 Hyperactivity -0.11 0.16 0.491 0.02 0.09 0.793 0.31 0.15 0.048 0.34 0.11 < 0.001 Notes . SMU = social media use; RI-CLPM = random intercept cross-lagged panel model; r = correlation; SE = standard error; p = p-value.