Development of a Brief Version of the Social Phobia Inventory Using Item Response Theory: The Mini-SPIN-R
Section snippets
Participants
The sample included 569 individuals with generalized SAD who were recruited as part of two treatment trials. Trial I was a three-site trial including Boston University, Southern Methodist University, and Massachusetts General Hospital, and Trial II was a three-site trial including McMaster University, University of California–San Diego, and Massachusetts General Hospital. Thus, data were combined from five sites across the U.S. and Canada. Participants were mostly male (62.12%) and the average
IRT Analysis of the Spin
The discrimination and threshold parameters for all 17 SPIN items appear in Table 1.1 Many of the SPIN items were better able to discriminate in lower levels of social anxiety in the present sample. Nine of the 17 items had three negative threshold (b) values indicating 3 discrimination levels of
Discussion
The present study used item response theory to examine the items of the SPIN. We found that Items 5 (fear of being criticized), 12 (avoidance of criticism), and 14 (fear of being watched) were the most sensitive items for assessing social anxiety among individuals with the disorder. All three items are different from the existing mini-SPIN items used to screen for SAD. This revised version of the mini-SPIN (mini-SPIN-R) has good reliability and validity properties, which make it a promising
Declarations of Interest
Dr. Aderka has no interests to declare.
Dr. Pollack is a consultant (or on the advisory board) for the following organizations: Brain Cells, Eli Lilly, Johnson and Johnson, Medavante, Labopharm, Mindsite, Sepracor, Targia Pharmaceuticals, and Pfizer. He is supported by research grants from Bristol Myers Squibb, Euthymics, Forest Laboratories, GlaxoSmithKline, Eli Lilly, NCCAM, NIDA, NIMH, Sepracor. He has received support from Astra-Zeneca, Sepracor, Pfizer, and has equity in Medavante, Mensante
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