“…Several studies have shown associations between an open group climate and favourable clinical outcomes in clients without intellectual disabilities, such as greater personal development (Van der Helm, Stams, Van Genabeek, & Van der Laan, 2012), increased empathy (Heynen et al, 2017;Van der Helm, Stams, Van der Stel, et al, 2012), fewer mental problems (Beijersbergen et al, 2014), greater internal locus of control (Van der Helm et al, 2009), adaptive coping skills, higher level of treatment motivation (Van der Helm et al, 2014), less aversive responses to social problem situations such as hostile and aggressive behaviour (Eltink et al, 2015), and less aggressive behaviour (Robinson et al, 2018;Van den Tillaart et al, 2018). An association between an open group climate and less aggressive behaviour has also been found in clients with mild intellectual disabilities (Neimeijer et al, 2021).…”