“…Social skills, such as decision making and conflict-managing skills, are considered to be complex and require extensive training. Research into children's social skills during cooperative processes has indicated that younger children especially need training in these skills (Gijlers, Weinberger, van Dijk, Bollen, & van Joolingen, 2013;van Dijk, Gijlers, & Weinberger, 2014), and that this training should occur outside of the cooperative process itself (cf., Saab, van Joolingen, & van Hout-Wolters, 2007).…”