Journal
PSYCHOLOGICAL ASSESSMENT
Volume 18, Issue 2, Pages 231-237Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/1040-3590.18.2.231
Keywords
social anxiety; confirmatory factor analysis; item response theory
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Funding
- NCRR NIH HHS [RR00349] Funding Source: Medline
- NIMH NIH HHS [MH44119, MH40121, P05 MH30906] Funding Source: Medline
- NATIONAL CENTER FOR RESEARCH RESOURCES [M01RR000349] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF MENTAL HEALTH [R10MH044119, P30MH030906, P50MH030906, R01MH040121, R10MH040121, R01MH044119] Funding Source: NIH RePORTER
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The widely used Social Interaction Anxiety Scale (SIAS: R. P. Mattick & J. C. Clarke, 1998) possesses favorable psychometric properties, but questions remain concerning its factor structure and item properties. Analyses included 445 people with social anxiety disorder and 1,689 undergraduates. Simple unifactorial models fit poorly, and models that accounted for differences due to item wording (i.e., reverse scoring) provided superior fit. It was further found that clients and undergraduates approached some items differently, and the SIAS may be somewhat overly conservative in selecting analogue participants from an undergraduate sample. Overall, this study provides support for the excellent properties of the SIAS's straightforwardly worded items, although questions remain regarding its reverse-scored items.
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