“…Moreover, research has demonstrated significant differences between substance-dependent and non-clinical groups on EMS, with the substance-dependent population endorsing significantly higher EMS levels (e.g., Brotchie, Meyer, Copello, Kidney, & Waller 2004; Roper, Dickson, Tinwell, Booth, & McGuire, 2010; Shorey, Stuart, & Anderson, 2013a; 2014). Additionally, in one study comparing EMS among alcohol and drug dependent populations, results indicated that the two groups did not significantly differ on many of the EMS (Shorey, Stuart, & Anderson, 2013b). Additionally, preliminary research has started to examine whether EMS change following treatment for substance dependence (Shorey, Stuart, Anderson, & Strong, 2013, Ball, 2007).…”