“…In a randomized clinical trial of exposure, relaxation, and rescripting therapy (ERRT), which includes stimulus control, progressive muscle relaxation, and IR encouraging participants "to utilize relevant themes" (p. 127) when changing nightmares, Davis and Wright [55] reported significant improvements in nightmare frequency and severity as well as in PTSD symptom severity in a sample of trauma survivors with nightmares, 66 percent of whom met diagnostic criteria for PTSD. However, Davis and Wright [55] found no improvements in total sleep time or measures of sleep quality. Krakow et al [50] provided combined IRT and CBTI, including stimulus control, sleep restriction, and sleep hygiene components, to a group of 62 violent crime survivors with PTSD and found improvements in sleep quality and nightmare frequency, along with decreases in PTSD symptoms.…”