Psychometric Properties of the Turkish Brief Symptom Measure-25

The Brief Symptom Measure-25 (BSM-25) is a quick and self-administrated measurement, which was originally developed to assess general psychiatric symptomatology. The aim of the present study was to examine the psychometric properties of the Turkish BSM-25. The non-clinical sample consisted of 382 adult participants (71.5% were female) and the clinical sample consisted of 42 adult participants (76.2% were female). To test the psychometric properties of the Turkish BSM-25, we performed a series of analyses including basic explanatory factor analysis, bifactor modeling, bivariate correlation, one-way ANOVA, and ROC analysis. The results indicated that the Turkish BSM-25 had a high level of internal consistency (.92) and acceptable fit indices (RMSEA = .07, CFI = .95 GFI = .97 NNFI = .94). Furthermore, the Turkish BSM-25 successfully discriminated the clinical and non-clinical samples and showed strong validity. The cut-off score was 70.50. In conclusion, the present study provided empirical support for the psychometric adequacy of the Turkish BSM-25 and yielded one general factor.