Validity and Reliability of the German Vocal Fatigue Index in Adults With Voice Disorders.

Purpose: Vocal fatigue-related symptoms, frequent in patients with voice disorders, are reliably quantifiable with the Vocal Fatigue Index (VFI) in several languages. The main aim of this work was to investigate the content and construct validity of the German Vocal Fatigue Index (VFI-D) by comparison with the German Voice Handicap Index 9 international (VHI9i) and the Vocal Tract Discomfort Scale (VTD). Moreover, the scale and retest reliability were investigated.

[Vocal fatigue as an indicator of complex voice disorders-a diagnostic and therapeutic challenge].

Vocal fatigue is increasingly observed among professional voice users (e.g., teachers).

Evaluation of a Non-Personalized Optopalatographic Device for Prospective Use in Functional Post-Stroke Dysphagia Therapy.

Objective: Stroke survivors commonly suffer from dysphagia, originating from oro-facial impairments which affect swallowing function. Functional therapy often employs tongue exercises that require the patient to perform short motion sequences. Evaluating the patient's performance on those exercises is difficult, because there is no reliable form of visual feedback.

[Pretesting of the German Vocal Fatigue Index (VFI-D)-transcultural translation and cross validation].

Background: In clinical routine, vocal fatigue is a common symptom in patients with dysphonia.

Objective: The aim of this study was to conduct a transcultural translation of the Vocal Fatigue Index (VFI), a standardized subjective questionnaire. Furthermore, pretesting and prevalidation were performed in 20 subjects, with comparison to the Voice Handicap Index (VHI‑9i) and the Vocal Tract Discomfort Scale (VTD).