Document Type



The widespread use of Mattick and Clarke’s (1998) Social Interaction Anxiety Scale (SIAS) and Social Phobia Scale (SPS) led two independent groups of researchers to develop short-forms of these measures (Fergus, Valentiner, McGrath, Gier-Lonsway, & Kim, 2012; Peters, Sunderland, Andrews, Rapee, & Mattick, 2012). This three-part study examined the psychometric properties of Fergus et al.’s and Peters et al.’s short-forms of the SIAS and SPS using an American nonclinical adolescent sample in Study 1 (N = 98), American anxiety disorder patient sample in Study 2 (N = 117), and both a South Korean college student sample (N = 341) and an American college student sample (N = 550) in Study 3. Scores on both sets of short-forms evidenced adequate internal consistency, inter-item correlations, and measurement invariance. Scores on Fergus et al.’s short-forms, particularly their SIAS short-form, tended to capture more unique variance in scores of criterion measures than did scores on Peters et al.’s short-forms. Implications for the use of these two sets of short-forms are discussed.



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This article may not exactly replicate the final version published in the American Psychological Association journal. It is not the copy of record. The version of record can be found here:

Legacy Department

Department of Psychology




American Psychological Association



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