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We investigated the factor structure, reliability estimates, and correlates of the Anxiety Sensitivity Index–3 (ASI–3; Taylor et al., 2007) in 2 studies. We established a bifactor model in Study 1 as an alternative representation of the structure of the ASI–3. Analyses of gender differences on the total ASI–3 and subscale scores were Anxiety sensitivity index 3 pdf Mundingburra Abstract The Anxiety Sensitivity Index3 (ASI- -3) is an 18-item measure, recently developed to assess AS, based, consisting of Physical Concerns (eg, the belief that palpitations lead to a cardiac arrest), Social Concerns (eg, the