“…Though intended by its developers to be a unidimensional measure of AS, several published studies factor analyzing the ASI have called into question the instrument's factor structure. While some studies report as many as four factors in the ASI (Cox, Parker, & Swinson, 1996;Telch, Shermis, & Lucas, 1989;Wardle, Ahmed, & Hayward, 1990), several other studies found a three-factor solution (Stewart, Taylor, & Baker, 1997;Taylor, Koch, Woody, & McClean, 1996;Zinbarg, Barlow, & Brown, 1997), and at least one recent study reported a two-factor model (Cox, Enns, Walker, Kjernisted, & Pidlebury, 2001). Still other analyses of the ASI reported only a one-factor solution (Reiss et al, 1986;Sandin, Charot, & McNally, 1996;Taylor, 1996;Taylor, Koch, & Crockett, 1991;Taylor, Koch, McNally, & Crockett, 1992).…”