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GRBAS and Cape-V scales: high reliability and consensus when applied at different times
Katia Nemr1, Marcia Simões-Zenari, Gislaine Ferro Cordeiro
1Department of Physiotherapy, Communication Science & Disorders, Occupational Therapy, School of Medicine, University of São Paulo, São Paulo, Brazil. knemr@usp.br
Journal of Voice : Official Journal of the Voice Foundation
|October 3, 2012
Summary
The GRBAS and CAPE-V scales demonstrate high reliability and consensus for voice quality assessment. Both scales are effective for analyzing dysphonia, with CAPE-V noted for sensitivity to subtle voice changes.
Area of Science:
- Speech-language pathology
- Acoustic analysis
- Voice disorders
Background:
- Assessing voice quality is crucial for diagnosing and managing dysphonia.
- The General Rate, Breathiness, Asthenia, Roughness, and Instability (GRBAS) scale and the Consensus Auditory-Perceptual Evaluation-Voice (CAPE-V) scale are commonly used perceptual tools.
- Evaluating the reliability and consensus of these scales is essential for their clinical application.
Purpose of the Study:
- To compare the reliability and consensus of the GRBAS and CAPE-V scales when applied to the same voice samples at different times.
- To determine if both scales yield consistent results in perceptual voice analysis.
Main Methods:
- An observational, cross-sectional study involving 60 subjects.
- Voice recordings were obtained using CAPE-V tasks, including sustained vowels, sentence repetition, and spontaneous speech.
- Auditory-perceptual voice analysis was performed by three experienced speech therapists using both GRBAS and CAPE-V scales.
Main Results:
- Strong intrajudge consensus was found for both GRBAS (ICC 0.923-0.985) and CAPE-V scales.
- A high correlation (coefficient=0.842) was observed between the general grades of both scales, with similar dysphonia distribution.
- Evaluators found GRBAS easier to apply quickly, while CAPE-V was perceived as more sensitive to minor voice alterations.
Conclusions:
- Both the GRBAS and CAPE-V scales are reliable tools for voice quality analysis.
- These scales are recommended for clinical use in evaluating patients with dysphonia.
- The study supports the consistent application of these perceptual voice assessment tools.
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