“…Uddo, Vasterling, Brailey, and Sutker (1993), in a study of 16 Vietnam veterans with posttraumatic stress disorder, failed to find a difference in performance on the digit span when compared to matched controls. However, this study did find a significant decrement in performance on the Visual Span test of the Wechsler Memory Scale for posttraumatic stress disorder participants when compared with matched controls (Uddo et al, 1993). Sutker and colleagues (Sutker, Allain, & Johnson, 1993;Sutker, Vasterling, Brailey, & Main, 1995), in a number of studies with veterans featuring posttraumatic stress disorder, noted deficits with attention, mental tracking, and executive functions in these participants.…”