“…The specific nature of training in effective studies was diverse: problem solving (Ayres & Malouff, 2007;Varekamp et al, 2011), psychological flexibility (Biglan et al, 2013), sleep training (Ebert et al, 2015), happiness training (Feicht et al, 2013), mindfulness approaches (Flaxman & Bond, 2010a, 2010bMcGarrigle & Walsh, 2011), cognitive behavioural therapy [CBT] (Kojima et al, 2010;Proudfoot, Corr, Guest, & Dunn, 2009), stress management (Lloyd et al, 2016;Umanodan, Shimazu, Minami, & Kawakami, 2014), resilience training (Mache et al, 2015), meditation awareness training (Shonin et al, 2014), relaxation training (Taniguchi et al, 2007), psychosocial skills training (Traeger et al, 2013), empowerment (Whiteside et al, 2006) and coping skills (Williams et al, 2009). The diversity of approaches reporting positive effects suggests that the particular focus of this kind of training is not that important.…”