Measurement invariance of the Social Interaction Anxiety Scale (SIAS) was examined in secondary samples of young adults and adults from China and the USA. Confirmatory factor analysis found that a...Show moreMeasurement invariance of the Social Interaction Anxiety Scale (SIAS) was examined in secondary samples of young adults and adults from China and the USA. Confirmatory factor analysis found that a unidimensional structure of the SIAS, in which its three reverse- coded items were removed (S-SIAS), showed the best fit for both samples. Subsequently, this model was used in a hierarchical multi-group confirmatory factor analysis (MGCFA). The results of the MGCFA support the S-SIAS’ configural and metric invariance across these two countries. This is an indication of the S-SIAS being a unidimensional measure of social interaction anxiety in the USA and China. However, the results indicate the presence of only partial scalar invariance. Therefore, it is likely that individuals from these cultures interpret certain items of the SIAS differently, which complicates direct comparisons across these groups. What this implies for past and current research comparing individuals from these cultures, in terms of social anxiety, as well as implications for future research, are explored further.Show less
