“…The predominant age range was 20 to 30 years. Regarding gender, 10 studies (Behnke & Sawyer, 2000; Carrilo et al, 2001; Hazlett-Stevens & Borkovic, 2001; Sawyer & Behnke, 2002; Addison et al 2003; Zohar et al 2003; Croft et al 2004; Gruenewal et al 2004; Kopecky et al 2004; Schwerdtfeger, 2004) worked with both sexes, five only with female volunteers (Egloff et al 2002; Gonzalez-Bono et al, 2002; Carrilo et al 2003; Mauss et al 2003; Vassend & Knardahl, 2005), three (Benke & Sawyer, 2001; Jezova et al 2004; Hofmann et al 2005) only with male volunteers, and one did not provide gender information (Savitsky & Gilovich, 2003). The gender variable, considered to be of relevance and to have specific influences on the profile of anxiety according to the literature, represented a focal point of interest in these studies or was used as an inclusion/exclusion criterion.…”