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Behav Ther. 2013 Dec;44(4):651-61. doi: 10.1016/j.beth.2013.04.011. Epub 2013 May 3.

Development of a brief version of the Social Phobia Inventory using item response theory: the Mini-SPIN-R.

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Boston University and University of Haifa. Electronic address:


The Social Phobia Inventory (SPIN) is a widely used measure in mental health settings and a 3-item version (mini-SPIN) has been developed as a screening instrument for social anxiety disorder. In the present study, we examined the psychometric properties of the SPIN and developed a brief version (mini-SPIN-R) designed to assess social anxiety severity using item response theory. Our sample included 569 individuals with social anxiety disorder who participated in 2 clinical trials and filled out a battery of self-report measures. Using a nonparametric kernel smoothing method we identified the most sensitive items of the SPIN. These 3 items comprised the mini-SPIN-R, which was found to have greater internal consistency, and to capture a greater range of symptoms compared to the mini-SPIN. The mini-SPIN-R evidenced superior convergent validity compared to the mini-SPIN and both measures had similar divergent validity. Thus, the mini-SPIN-R is a promising brief measure of social anxiety severity.


assessment; item response theory; psychometric properties; social anxiety disorder; social phobia inventory

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