Turkish translation and validation of an interprofessional identity measure: EPIS-TR.

Research on interprofessional identity using the Extended Professional Identity Theory (EPIT) has shown promising results in measuring this identity, predicting interprofessional collaboration, and improving team outcomes. However, EPIT-based interprofessional identity has not been studied in Türkiye due to the absence of a Turkish version of the Extended Professional Identity Scale (EPIS). We aimed to develop and validate a Turkish EPIS, the EPIS-TR, and explore interprofessional identities across eight different professions. A cross-cultural adaptation of EPIS was made by linguistic validation, followed by analysis of psychometric properties using a sample of students from four Turkish universities and eight professions/programs (n = 405). Confirmatory factor analysis and reliability analyses were performed. Differences between professions were explored with ANOVA and a post hoc test. Three out of seven goodness-of-fit indices showed acceptable fit (x²/df = .004; RMSEA = .07; GFI = .94), and others showed excellent fit (SRMR = .04; AGFI = .91; CFI = .97; NNFI = .96). The internal consistency of the EPIS-TR is .93. The EPIS-TR scale has strong psychometric properties. The construct validity of the EPIS-TR was similar to that of the original version. The interprofessional identity scores of the different professions were mostly similar. Based on these findings, the EPIS-TR is well suited for measuring interprofessional identity.