Crystal Smit

Social Network Intervention 2 37 between condition and time ( V = .07, F (3,204) = 5.18, p = .002, p η 2 = .07) on the dependent variables. Furthermore, the model showed a significant multivariate main effect across condition (regardless of time points) ( V = .04, F (3,204) = 2.99, p = .032, p η 2 = .04) on the three dependent variables, but not across time (regardless of condition) ( V = .02, F (3,204) = 1.06, p = .367). In addition, the covariates thirst at baseline and post-intervention had a significant effect on the dependent variables ( V = .05, F (3,204) = 3.74, p = .012, p η 2 = .05; V = .05, F (3,204) = 3.43, p = .018, p η 2 = .05, respectively). Further interpretation of the multivariate interaction effect between condition and time are presented below in the univariate outcomes of the multivariate model adjusting for thirst. Water Consumption There was a significant main effect for condition ( F (1,206) = 7.59, p = .006, p η 2 = .04), but not for time ( F (1,206) = .16, p = .689) on water consumption. More importantly, there was a significant interaction effect between condition and time ( F (1,206) = 5.41, p = .021, p η 2 = .03) on water consumption, indicating that changes in water consumption differed for children in the intervention and control conditions. Posthoc contrast comparisons showed a significant difference in water consumption over time for the intervention condition ( M baseline = 2.67 ± SEM .13; M post-intervention = 2.92 ± SEM .14; p = .018), but not for the control condition ( M baseline = 2.37 ± SEM 0.13; M post-intervention = 2.27 ± SEM .14; p = .360). This means that children who were exposed to the social network-based intervention reported a significant increase in their water drinking compared to the children who were not exposed to the intervention. Sugar-Sweetened Beverage Consumption There were no significant main effects for condition ( F (1,206) = .003, p = .957) or time ( F (1,206) = 2.46, p = .118); but a significant interaction effect between condition and time ( F (1,206) = 6.08, p = .015, p η 2 = .03) on SSB consumption.