“…In non-ASD populations poor emotional acceptance is well-known to be a contributor to anxiety (Baer, Smith, Hopkins, Krietemeyer, & Toney, 2006;Campbell-Sills, Barlow, Brown, & Hofmann, 2006; Douglas S. Mennin, McLaughlin, & Flanagan, 2009). It is one of the primary mechanisms of action targeted by mindfulness based therapies that have proven very successful in alleviating anxiety (Dan-Glauser & Gross, 2015;Kohl, Rief, & Glombiewski, 2012;Roemer, Orsillo, & Salters-Pedneault, 2008). Four small studies of mindfulness/acceptance-based psychotherapies have shown some reductions in anxiety in ASD samples of adults or adolescents (de Bruin, Blom, Smit, van Steensel, & Bögels, 2014;Kiep, Spek, & Hoeben, 2014;Pahnke, Lundgren, Hursti, & Hirvikoski, 2014;Spek, van Ham, & Nyklíček, 2013), suggesting that impairments in emotional acceptance may indeed be a factor mediating anxiety in ASD.…”