“…Since the early 1980's, researchers have begun to focus on the role of psychological factors which appear to have a critical influence over patients' recovery from illness (Ades, Waldmann, McCann & Weaver, 1992;Blumenthal, Williams, Wallace, Williams & Needles, 1982;Denollet, Sys, Stroobant, Rombouts, Gillebert & Brutsaert, 1996;Doerfler, Pbert & De Cosimo, 1997;Julkunen et al, 1994;Linden, Stossel & Maurice, 1996;Moser & Dracup, 1995;Oldhdge, Streiner, Hoffmann & Guyatt, 1994;Stewart, Hirth, Klassen, Makrides & Wolf, 1997). In recent years, researchers have developed the Causal Model of Invalidism to explain the process of psychological distress and dependency in coronary patients (Riegal, Dracup & Glaser, 1998).…”