“…These researchers documented equivalent efficacy rates for both sequences of exposure techniques, reporting symptom reductions of 65 to 80%; no patient met criteria for PTSD at one-year follow-up. Thompson, Charlton, Kerry, Lee, and Turner (1995) reported a 35% symptom reduction per Clinician Administered PTSD Scale (CAPS; Blake et al, 1990) and a 42% reduction on the Impact of Events Scale (IES; Horowitz, Wilner, & Alvarez, 1979) scores following eight weekly sessions of exposure treatment. Numerous investigations also have demonstrated the efficacy of PE administered to PTSDdiagnosed veterans (e.g., Boudewyns, Hyer, Woods, Jarrison, & McCranie, 1990;Keane, Fairbanks, Caddell, & Zimmerman, 1989).…”