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  • Title: The claustrophobia scale: a psychometric evaluation.
    Author: Ost LG.
    Journal: Behav Res Ther; 2007 May; 45(5):1053-64. PubMed ID: 17303070.
    Abstract:
    This article presents a psychometric evaluation of the Claustrophobia Scale (CS), consisting of one subscale for measuring anxiety (20 items, 0-4) and one for avoidance (18 items, 0-2). Participants were 87 claustrophobic patients and 200 normal controls randomly selected from the community. The results show that CS has excellent internal consistency, high test-retest reliability, concurrent and discriminant validity. The patients and controls differ significantly on the total scores of anxiety and avoidance, as well as on each individual item scores. The CS was also found to be sensitive to change after cognitive behavioral treatment. Preliminary factor analyses yielded two factors for each subscale; "Being in small enclosed spaces" and "Other people present", accounting for large proportions of the variance. The CS is useful both as a state, and as an outcome self-report measure of claustrophobia.
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