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KMID : 0981220130130030511
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Congnitive Behavior Therapy in Korea
2013 Volume.13 No. 3 p.511 ~ p.535
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Validation of the Short Form of the Korean Social Interaction Anxiety Scale (K-SIAS) and the Korean Social Phobia Scale (K-SPS)
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Kim So-Jung
Yoon Hyae-Young
Kwon Jung-Hye
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Abstract
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The Social Interaction Anxiety Scale (SIAS) and the Social Phobia Scale (SPS) are a companion set of measures that are some of the most popular self-report scales of social anxiety. The scales have shown good reliability and validity across several previous studies. Despite their sound psychometric properties, there are still controversies over their factor structures. Also, the length of the scales are burdensome for epidemiological and clinical research. The purpose of the present investigation was to find the most proper shortened forms of the SIAS and the SPS for Koreans and to validate them. Using data from patients with social anxiety disorder (n=205) and normal controls (n=445), confirmatory factor analyses have been performed to compare the short forms of the SIAS and the SPS. Peters et al.(2012)’s two factor model showed the best model fit in a clinical sample, while Carleton et al.(2009)’s three factor model did so in a non-clinical sample and in a combined sample of the clinical and the non-clinical samples. The two short forms of the SIAS and the SPS were tested for their validity and reliability, as well as for their sensitivity to change and diagnostic sensitivity. The scores of the short forms of the SIAS and the SPS correlated significantly with the scores of the original SIAS and SPS, and with the scores on measures of related constructs. Also the cutoff scores of the shortened forms of the scales discriminated well between those with and without a diagnosis of social anxiety disorder. They also reflected therapeutic changes associated with cognitive behavior group therapy significantly as well. In conclusion, the Carleton et al.(2009)’s and Peters’s et al.(2012)’ short forms were both adequate for Korean population when considering overall model fit indexes, reliability and validity. Therefore, it is suggested that researchers and clinicians flexibly use the short forms of the SIAS and the SPS according to their target groups or study interests.
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KEYWORD
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SIAS, SPS, short form scale, social anxiety, reliability, validity
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