“…Some authors have observed that the participation of the spouse in therapy, either as a co-therapist or to actively support the client, can enhance the efficacy of standard CBT, and even foster greater long-term gains after therapy termination (Barlow, O'Brien and Last, 1984;Barlow and Waddell, 1985;Cerny, Barlow, Craske and Himadi, 1987;Côté, Gauthier, Laberge, Cormier and Plamondon, 1993;Mathews, Jannoun and Gelder, 1979). However, other authors did not demonstrate the usefulness of spousal participation in the treatment of PDA (Cobb, Mathews, Childs-Clarke and Blowers, 1984;Emmelkamp et al, 1992;Marchand and Comeau, 1992).…”