Crystal Smit

Evaluation of the Motivation Process 5 123 Limitations and Suggestions for Future Research Some limitations shouldbeaddressed in interpreting thefindings of this study. First, although the current paper collected data from the target group in the intervention (i.e., influence agents and their peers), it is important for future research to conduct a thorough process evaluation of the program, including data from other perspectives involved in the intervention, for example, from the trainers, teachers, and parents. Process evaluations consider factors beyond effectiveness to assess the implementation of the intervention, such as the intervention and theoretical fidelity, dose, reach, and context of the intervention. Examining these factors could help in understanding why a program was successful or not (Grembowski, 2015; Moore et al., 2014; Steckler, Linnan, & Israel, 2002). Related to this, in addition to the quantitative data, the current study only analyzed responses to open-ended questions to evaluate the implementation of the training. Therefore, we consider it important for future research to conduct interviews and focus groups with all parties involved in the social network intervention. Third, the current study did not explicitly measure the extent to which the self- determination theory-based techniques used in the training facilitated the psychological needs (i.e., autonomy, competence, and relatedness; Deci & Ryan, 2000). It is therefore essential for future research to delve deeper into the process of these psychological mediators by including them as evaluation measures to explore the fidelity of the intervention to self-determination theory (for an example, see Sebire, Kesten, et al., 2016). Finally, the assessment of children’s beverage consumption was based on self-report. Although self-reported intakes with multiple 24-h recall measurements, including weekdays and weekend days, are generally considered reliable for children aged 4 to 11 years (Burrows, Martin, & Collins, 2010), one should keep in mind that there is the potential for under- or overreporting (Collins et al., 2010). In addition, parents were not included as reporters to supplement the dietary intake information obtained from the children (Burrows et al., 2010). However, research has shown that children aged 10 years and older can reliably report their intake behavior (Moore et al., 2014).