TY - JOUR
T1 - The Reliability and Validity of the Mandarin Chinese Version of the Vocal Fatigue Index
T2 - Preliminary Validation
AU - Chan, Roger W.
AU - Lin, Feng Chuan
AU - Lee, Yung Hsi
AU - Liao, Chia En
AU - Jen, Jung Hsuan
AU - Wu, Chia Hsin
AU - Wang, Chi Te
N1 - Publisher Copyright:
© 2022 American Speech-Language-Hearing Association.
PY - 2022/8
Y1 - 2022/8
N2 - Purpose: This study attempted to develop and to preliminarily validate the Mandarin Chinese version of the Vocal Fatigue Index (VFI) as a standardized selfassessment questionnaire tool for potential clinical applications. Method: The experimental procedure involved (a) cross-cultural adaptation of the VFI into the Mandarin Chinese version (CVFI), (b) evaluation by an expert panel, (c) back translation, (d) pilot testing, and (e) validation of the questionnaire by three participant groups: 50 with voice disorders, 50 occupational voice users (at-risk group), and 50 with normal voice (control group). Internal consistency, test–retest reliability, content validity, and convergent validity of the CVFI were examined, and discriminatory ability (diagnostic accuracy) for distinguishing between the groups was evaluated. Results: Results showed high internal consistency (Cronbach’s alpha ≥.8817 for the total CVFI scores for all groups), high test–retest reliability (intraclass correlation coefficients ≥.9072, p <.001 for the total CVFI scores for all groups), high content validity (total content validity index = 0.9368), and high convergent validity (Pearson r ≥.8155, p <.001 between the total CVFI scores and Factors 1 and 2 scores). Significant differences between the three groups were found in all scores. Receiver operating characteristic analysis revealed a high diagnostic accuracy for distinguishing between the disorders group and the normal group (area under the curve ≥ 0.927, p <.001 for the total CVFI scores and Factors 1 and 2 scores), with cutoff scores of ≥ 36 (total CVFI score), ≥ 23.5 (Factor 1 score), ≥ 7.5 (Factor 2 score), and ≤ 6.5 (Factor 3 score). Conclusions: These findings suggested that the CVFI could be a reliable and valid self-assessment tool for the clinical evaluation of vocal fatigue in Mandarin Chinese–speaking populations. A full-scale validation study of the CVFI is recommended to verify these results.
AB - Purpose: This study attempted to develop and to preliminarily validate the Mandarin Chinese version of the Vocal Fatigue Index (VFI) as a standardized selfassessment questionnaire tool for potential clinical applications. Method: The experimental procedure involved (a) cross-cultural adaptation of the VFI into the Mandarin Chinese version (CVFI), (b) evaluation by an expert panel, (c) back translation, (d) pilot testing, and (e) validation of the questionnaire by three participant groups: 50 with voice disorders, 50 occupational voice users (at-risk group), and 50 with normal voice (control group). Internal consistency, test–retest reliability, content validity, and convergent validity of the CVFI were examined, and discriminatory ability (diagnostic accuracy) for distinguishing between the groups was evaluated. Results: Results showed high internal consistency (Cronbach’s alpha ≥.8817 for the total CVFI scores for all groups), high test–retest reliability (intraclass correlation coefficients ≥.9072, p <.001 for the total CVFI scores for all groups), high content validity (total content validity index = 0.9368), and high convergent validity (Pearson r ≥.8155, p <.001 between the total CVFI scores and Factors 1 and 2 scores). Significant differences between the three groups were found in all scores. Receiver operating characteristic analysis revealed a high diagnostic accuracy for distinguishing between the disorders group and the normal group (area under the curve ≥ 0.927, p <.001 for the total CVFI scores and Factors 1 and 2 scores), with cutoff scores of ≥ 36 (total CVFI score), ≥ 23.5 (Factor 1 score), ≥ 7.5 (Factor 2 score), and ≤ 6.5 (Factor 3 score). Conclusions: These findings suggested that the CVFI could be a reliable and valid self-assessment tool for the clinical evaluation of vocal fatigue in Mandarin Chinese–speaking populations. A full-scale validation study of the CVFI is recommended to verify these results.
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U2 - 10.1044/2022_JSLHR-21-00492
DO - 10.1044/2022_JSLHR-21-00492
M3 - Article
C2 - 35944023
AN - SCOPUS:85136015766
SN - 1092-4388
VL - 65
SP - 2846
EP - 2859
JO - Journal of Speech, Language, and Hearing Research
JF - Journal of Speech, Language, and Hearing Research
IS - 8
ER -