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Anxiety sensitivity is well known to play an important role in the development, maintenance, and treatment of anxiety disorders, particularly panic disorder. Since the development of the 16-item Anxiety Sensitivity Index(ASI), there has been considerable controversy in the literature about its factor structure. To examine the factor structure of a Korean version of the ASI(K-ASI), various factor models identified in previous studies were evaluated using confirmatory factor analysis(CFA). K-ASI responses were collected from 333 undergraduate students. The results of CFA supported a hierarchical factor structure consisting of 4 lower order factors and 1 higher order factor. The lower order factors as originally identified by Peterson & Heilbronner(1987) were fear of mental catastrophe, fear of publicly observable anxiety reactions, fear of cardiopulmonary and gastrointestinal sensations, and fear of vasovagal sensations. The implications and limitations of the present study were discussed.
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