Crystal Smit

General Discussion 6 137 autonomy (Anselma et al., 2019; Visser et al., 2005). This co-creative approach ensures that the designed interventions meets the needs and interests of the targeted children and adolescents (Ozer, Ritterman, & Wanis, 2010). Focus on Peers This dissertation focused only on peer influence, although there are other significant influences in the social environment of children such as parents, teachers, and athletic coaches. The literature indicates that, especially among primary school children, parents also play an important role in terms of social norms (Bevelander et al., 2020), but also through access and availability of food at home, modeling and social facilitation (Salvy, Elmo, Nitecki, Kluczynski, & Roemmich, 2011; Yee, Lwin, & Ho, 2017). This was also confirmed in Chapter 3 and, therefore, it is conceivable that these parental influences may interact with the effects of the Share H 2 O intervention, especially when parents do not drink enough water (Vieux et al., 2020). Future research should aim at obtaining and mapping the entire social environment of children, that is, the social influences both inside and outside the classroom (Kiesner, Kerr, & Stattin, 2004). This insight would provide information about how these different actors influence each other and on which actors interventions should focus. New analysis techniques, such as agent-based modeling (bandini, Manzoni, & Vizzari, 2009), make it possible to analyze complex influence networks. Agent-based modeling can stimulate the communication among the actors in an entire social environment, leading to a better understanding of the impact on behavior (e.g., Giabbanelli, Alimadad, Dabbaghian, & Finegood, 2012; van Woudenberg et al., 2019). Conceptualization of Intrinsic Motivation In this dissertation only the intrinsic motivation to drink water was measured in order not to burden the children with too many questions. However, the results in this dissertation indicated that it would be worthwhile to delve deeper into the underlying mediators of intrinsic motivation. According to self-determination theory, the degree of intrinsic motivation depends on whether and to what extent an individual’s basic psychological needs (i.e., autonomy, competence and