Process evaluation of TeamUp: a movement-based psychosocial intervention for refugee children in the Netherlands.

(1) Attendance and group size were lower than expected. (2) The intervention's facilitator fidelity ranged from moderate to adequate-exhibiting a need for specific fidelity and capacity strengthening-while facilitator competencies were high. Trainee's perceived self-efficacy improved significantly following a 2-day training. (3) Facilitators expressed high levels of satisfaction, self-efficacy and support, and low burden. The intervention was positively perceived by all stakeholders and to have a positive impact on children's psychosocial learning and wellbeing.