Validity and Reliability of the German Vocal Fatigue Index in Adults With Voice Disorders.
Lydia Elaine StappenbeckSylva BartelJörg Edgar BohlenderMeike Brockmann-BauserPublished in: Journal of speech, language, and hearing research : JSLHR (2024)
In this study, the content and construct validity of the VFI-D were confirmed. Also, both scale reliability with identical factors as those in the original study and retest reliability were verified. The VHI9i and VTD were highly indicative of VFI-D Factors 1 and 2, respectively. No correlation between Factor 3 and the other questionnaires was determined. Future research should evaluate which characteristics are specific to vocal fatigue versus general voice disorder-related symptoms.
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