“…A number of scales have been developed (Ahern, Kiehl, Sole, & Byers, 2006;Wagnild & Young, 1993;Bartone, Ursano, Wright, & Ingraham, 1989) or specific parameters extracted from other scales (Huppert & Whittington, 2003) to measure resilience or its main components: for example, hardiness (Kobasa, 1979;Hull, Van Treuren, & Virnelli, 1987), perceived stress (Cohen, Kamarck, & Mermelstein, 1983), optimism and life attitude (Bowen, Morasca, & Meischke, 2003). However, application of these measures has generally been restricted to specific populations (Carlson, 2001;Mosack, 2002), and generalisability cannot be assumed since the scales incorporate different constructs according to individual authors' concepts of resilience and underlying mechanisms.…”