“…Early research was guided primarily by the anxiety model (e.g., Mowrer, 1960;Wolpe, 1958), which held that treatments reduce phobic behavior by extinguishing conditioned anxiety reactions. Evidence mounted showing that anxiety arousal was largely unrelated to phobic behavior (Bandura, 1969;Lader, 1975;Lang, 1971;Leitenberg, Agras, Butz, & Wincze, 1971;Rachman, 1976;Rachman & Hodgson, 1974) and that clients' anxiety during treatment had little or no bearing on therapeutic outcome (Emmelkamp, 1982;Marks, 1978a;Mathews, Gelder, & Johnston, 1981). As a result, the role of anxiety was downplayed, but the procedures and processes of therapeutic change continued to be conceptualized in terms of "exposure" and "extinction" (Borkovec, 1978;Marks, 1978a;Mathews et al, 1981;Mavissakalian & Barlow, 1981).…”