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Published on: September 27, 2024
Methodological Considerations for the Acoustic Voice Quality Index in Persian-Speaking Populations: A Technical Note
Mehran Ghasemi1, Shahryar Zainaee1, Mahdi Tahamtan2
1Department of Communication Sciences and Disorders, College of Health and Human Services, Bowling Green State University, Bowling Green, Ohio, USA.
Summary
The Acoustic Voice Quality Index (AVQI) shows promise for Persian speakers, but methodological variations impact its use. Standardizing protocols is crucial for reliable voice quality assessment in this population.
Area of Science:
- Speech and Hearing Sciences
- Linguistics
- Medical Diagnostics
Background:
- The Acoustic Voice Quality Index (AVQI) is a tool for voice disorder assessment.
- Its validation in Persian-speaking populations requires technical comparison of existing studies.
- Discrepancies in AVQI cut-off values and protocols necessitate evidence-based recommendations.
Purpose of the Study:
- To technically compare, evaluate, and discuss the methodological design, psychometric properties, and external validity of AVQI validation studies in Persian speakers.
- To provide recommendations for clinicians and researchers using AVQI for Persian voice quality assessment.
Main Methods:
- Systematic literature search for peer-reviewed studies validating AVQI in Persian speakers.
- Inclusion criteria: assessment of AVQI with healthy and disordered voices, reporting statistical/methodological details.
- Methodological quality assessed using QUADAS-2 checklist; expert panel analysis of consistencies/inconsistencies.
Main Results:
- All three included studies demonstrated acceptable concurrent validity and diagnostic accuracy for AVQI.
- Significant inconsistencies found in methodological design and optimal AVQI cut-off thresholds.
- Variability in psychometric properties (sensitivity, specificity) linked to differences in speech stimuli, rater experience, and dialects.
Conclusions:
- While AVQI exhibits strong psychometric properties in Persian speakers, methodological inconsistencies challenge its clinical and research application.
- Clinicians should align assessment protocols with studies providing optimal thresholds.
- Future research needs to address regional variations, standardize speech tasks, and clarify demographics for improved AVQI implementation.
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