“…Several studies demonstrate associations between model-derived maintaining factors and PTSD symptoms. For example peritraumatic processing style, memory quality, negative appraisals, cognitive avoidance and rumination all show significant associations with PTSD symptoms in cross-sectional and longitudinal studies in children and adolescents from the age of 8-18 years (Aaron, Zaglul, & Emery, 1999;Duffy et al, 2015;Ehlers, Mayou, & Bryant, 2003;Ellis, Nixon, & Williamson, 2009;McKinnon, Nixon, & Brewer, 2008;Meiser-Stedman, Dalgleish, Glucksman, Yule, & Smith, 2009;Meiser-Stedman, Smith, Glucksman, Yule, & Dalgleish, 2007;Meiser-Stedman et al, 2014;Salmond et al, 2011;Stallard & Smith, 2007). The robust association between negative appraisals and PTSD symptoms has been replicated in a number of studies (Mitchell, Brennan, Curran, Hanna, & Dyer, 2017).…”