“…Given the overlap between depression symptoms and negative schizophrenia symptoms, and the fact that other smoking studies have not reported elevated depression symptoms in SS versus CS (e.g., George et al, 2002), future studies assessing mediators of smoking lapse in this population should use instruments such as the Calgary Depression Scale (Addington, Addington, & Maticka-Tyndale, 1993), which has minimal overlap with negative symptoms, and the Positive and Negative Syndrome Scale (Kay, Fiszbein, & Opler, 1987) or Scale for the Assessment of Negative Symptoms (Andreasen, 1984) that may better differentiate between the roles of depression and negative symptoms in mediating smoking behavior in SS. A third limitation is that we did not assess several factors that contribute to smoking cessation outcomes in SS, such as self-efficacy for cessation, task persistence, and other measures of executive functioning (Mann-Wrobel, Bennett, Weiner, Buchanan, & Ball, 2011;Moss et al, 2009;Steinberg et al, 2012). The relative contributions of these factors could be examined in future studies using the current model.…”