Amount of General Factor Saturation in the Beck Anxiety Inventory Responses of Outpatients with Anxiety Disorders |
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| Authors: | Robert A Steer |
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| Institution: | (1) School of Osteopathic Medicine, UMDNJ-SOM, Department of Psychiatry, University of Medicine and Dentistry of New Jersey, 42 East Laurel Road, Suite 3204, Stratford, NJ 08084, USA |
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| Abstract: | To ascertain the amount of general factor saturation underlying the Beck Anxiety Inventory (BAI; Beck and Steer 1993) responses of anxious patients, the BAI was administered to 525 outpatients with DSM-IV-TR anxiety disorders. McDonald’s
omegahierarchical(ω
h) (Zinbarg et al. 2005) was calculated to estimate the amount of general factor saturation; ω
h is the amount of variance explained by a general (second-order) factor underlying a scale composed of multiple items divided
by the total amount of variance explained by all of the scale’s items. An iterated principal-factor analysis was first performed
and followed by a Schmid-Leiman transformation to determine the amount of variance explained by the second-order factor. ω
h was 0.70 95% CI 0.66–0.72], and this value was discussed as supporting the current practice of summing the 21 symptom ratings
of the BAI to estimate the overall severity of self-reported anxiety.
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| Keywords: | BAI McDonald’ s ω h coefficient α Factor analysis |
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