Nanjundeswaran Chayadevie, Jacobson Barbara H, Gartner-Schmidt Jackie, Verdolini Abbott Katherine
Department of Audiology and Speech-Language Pathology, East Tennessee State University, Johnson City, Tennessee.
Department of Hearing & Speech Sciences, Vanderbilt Bill Wilkerson Center, Vanderbilt University Medical Center, Nashville, Tennessee.
J Voice. 2015 Jul;29(4):433-40. doi: 10.1016/j.jvoice.2014.09.012. Epub 2015 Mar 17.
To develop a psychometrically sound self-report questionnaire, the Vocal Fatigue Index (VFI), to help identify individuals with vocal fatigue (VF) and characterize their complaints.
Descriptive research-scale development.
Four laryngologists and six speech-language pathologists specialized in voice created a beta version of the VFI (version 1), an index of 21 statements they considered to reflect VF. Two hundred patients presenting to two different clinics completed the VFI-1. Two items from VFI-1 were excluded because of poor item-to-total correlations. The final VFI of 19 items (version 2), completed by 105 patients with voice complaints and 70 vocally healthy individuals, was assessed for its psychometric properties.
Test-retest reliability for the final VFI was generally strong, as was sensitivity and specificity using the classification table under logistic regression for correctly distinguishing individuals with and without VF. Moreover, factor analysis indicated that VF may be characterized by three factors: (1) factor 1, related to tiredness of voice and voice avoidance, (2) factor 2, related to physical discomfort associated with voicing, and (3) factor 3, related to improvement of symptoms with rest.
The VFI is a standardized tool that can identify individuals with probable VF with good reliability, validity, sensitivity, and specificity.
开发一种心理测量学上合理的自我报告问卷——嗓音疲劳指数（VFI），以帮助识别嗓音疲劳（VF）个体并描述他们的症状。
描述性研究——量表开发。
四位喉科医生和六位专门从事嗓音研究的言语病理学家创建了VFI的测试版（版本1），这是一个包含21条陈述的指数，他们认为这些陈述能反映嗓音疲劳。在两家不同诊所就诊的200名患者完成了VFI - 1。由于项目与总分的相关性较差，VFI - 1中的两项被排除。由105名有嗓音问题的患者和70名嗓音健康的个体完成的最终包含19项的VFI（版本2），对其心理测量学特性进行了评估。
最终VFI的重测信度总体较强，使用逻辑回归下的分类表正确区分有无嗓音疲劳个体时的敏感性和特异性也较强。此外，因子分析表明，嗓音疲劳可能由三个因素表征：（1）因素1，与嗓音疲劳和避免发声有关；（2）因素2，与发声相关的身体不适有关；（3）因素3，与休息后症状改善有关。
VFI是一种标准化工具，能够以良好的信度、效度、敏感性和特异性识别可能患有嗓音疲劳的个体。
