... Endler, & Norton, 1994;Whittal, Suchday, & Goetsch, 1994), the association of panic attacks and dispositional risk factors such as anxiety sensitivity (Cox, Endler, Norton, & Swinson, 1991;Deacon & Valentiner, 2001;Donnell & McNally, 1990;Watt, Stewart, & Cox, 1998;Zvolensky & Raulin, 1999), as well as the incidence of panic attacks in other conditions, particularly Substance Use Disorders (e.g., MacPherson, Stewart, & McWilliams, 2001;Norton, Block, & Malan, 1991;Norton, Malan, Cairns, Wozney, & Broughton, 1989). Despite its popularity, several researchers have rightly cautioned the potential limits of the instrument in regard to sensitivity and specificity (Brown & Cash, 1989;Wilson, Sandler, Asmundson, Larsen, & Ediger, 1991). ...