The factor structure of the Social Interaction Anxiety Scale (SIAS) and the Social Phobia Scale (SPS) was evaluated in a Spanish university student sample. The objective of this study was to examine whether these scales are reliable measures in other languages and/or cultures. High levels of internal consistency were found. The results from the factor analyses replicated the structure proposed by the original authors and revealed that both scales are unidimensional and appear to measure different aspects of the social anxiety construct. Further, as in previous studies, gender differences were found on the SPS but not on the SIAS. Results support the psychometric properties of both the SIAS and the SPS in the assessment of Spanish-speaking samples.
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