“…In comparison, there were no differences in the internal reliability consistency or discriminant validity of the DRS among men faced with a prostate treatment decision. Based on the initial validation study, several studies report the DRS as a reliable measure in oncology patients faced with treatment decisions and participation in clinical trials (Sheehan, Sherman, Lam, & Boyages, 2007a; Sheehan, Sherman, Lam, & Boyages, 2007b; Stryker, Wray, Emmons, Winer, & Demetri, 2006; Whalen, Shin, Somerville, & McLean, 2002).…”