Reliability and Construct Validity of the Leipzig Short Scale of Sense of Coherence (SOC-L9) in Japanese Sample: The Rasch Measurement Model and Confirmatory Factor Analysis

Abstract

The present study aimed to examine the reliability and construct validity of the “Leipzig Short Scale of Sense of Coherence” (SOC-L9) in a Japanese sample, using item analysis based on the Rasch measurement model, confirmatory factor analysis, and longitudinal correlation analysis. According to the item fit statistics, nine items and the total score were confirmed to fit the model assuming the one latent factor. Furthermore, the SOC-L9 scores significantly correlated with the original 29-item version of the SOC-L9. The factor analysis showed that, similar to the previous study, the same model which assumed covariance between errors of some items, was suitable. These results indicate that SOC-L9 had high reliability and validity.