“…Measures of Post-Traumatic Stress Disorder (PTSD) have rarely been included in studies of psychiatric co-morbidity in ASD and ID (Bakken et al, 2010). However, individuals with ASD and ID seem to be at increased risk of falling victim to violence (Sullivan & Knutson, 2000;Jones et al, 2012;Mandell, Walrath, Manteuffel, Sgro & Pinto-Martin, 2005;Duan et al, 2015), sexual abuse (Gotby et al, 2018;Hershkowitz, Lamb & Horowitz, 2007;Mandell et al, 2005;Sullivan & Knutson, 2000), maltreatment/neglect (Dinkler et al, 2017;McDonnell et al, 2018;Chan, Lo & Ip, 2018;Sullivan & Knutson, 2000;Turner, Vanderminden, Finkelhor, Hamby & Shattuck, 2011;Chan & Lam, 2016), and bullying (Hoover & Kaufman, 2018;Sullivan & Knutson, 2000;Hoover, 2015). McDonnell et al (2018) found that children with ASD and ID, or either of these conditions alone, were at increased risk of maltreatment.…”