“…Behavioral problems are associated with experiencing life events (Ghaziuddin, 1988) and a potential side effect of psychiatric illness in this population group (Cooper, Melville, & Einfeld, 2003), with Marston, Perry, and Roy (1997) noting behavioral equivalents in the presentation of depression in people with intellectual disabilities. This supports modification of the general population criteria for PTSD, for example, by the inclusion of behavioral problems (McCarthy, 2001;Mitchell & Clegg, 2005), plus physical health changes (Mitchell, Clegg, & Furniss, 2006) and changes in skills (Murphy, O'Callaghan, & Clare, 2007), which have also been linked to the experience of adverse life events in people with intellectual disabilities.…”