Validity of the Czech Version of the Therapeutic Factors Inventory – Short Form (TFI-S)

This study’s aim was to assess validity of the Czech translation of the Therapeutic Factors Inventory (TFI-S), which includes four factors: Instillation of Hope, Secure Emotional Expression, Awareness of Emotional Impact, and Social Learning. We assessed data from 220 patients who attended a daily three-month treatment program that used integrative group psychotherapy. TFI-S’s reliability was satisfactory: at week 12, Cronbach’s α was .93 and McDonald’s ω was .95. Confirmatory factor analysis showed acceptable fit to our data: at week 12, χ2(146) = 262.5, p < 0.001, CFI = .994, TLI = .992, RMSEA = .071 (90% CI = .057–.084), and SRMR = .063. Predictive validity showed significant correlations between TFI-S factors and pre/post-treatment change. In the conclusion, we discuss possible future potential of cross-cultural research.