“…In studies of comorbidity between AVPD and social phobia prior to DSM-IV, considerable overlap was found (Alnaes & Torgersen, 1988;Brooks, Baltazar, & Munjack, 1989;Fahlen, 1995;Heimberg, Hope, Dodge, & Becker, 1990;Jansen, Arntz, Merckelbach, & Mersch, 1994;Sanderson, Wetzler, Beck, & Betz, 1994;Turner, Beidel, Borden, Stanley, & Jacob, 1991). Earlier studies that have compared patients with the generalized social phobia with and without AVPD argued for quantitative, not qualitative, differences between the two groups (Boone et al, 1999).…”