Objectives/hypothesis: The purpose of this study was to compare the agreement among several groups of listeners with different types of experience in regard to classifying voice quality.
Study Design: This is a retrospective cross-sectional quasi-experimental design.
Method: This study compared three groups: speech-language pathologists who specialize in voice, singing voice teachers, and inexperienced listeners. All groups were asked to classify voice samples as breathy, rough, or normal.
Results: Results show a significant difference across all groups with speech-language pathologists demonstrating a substantial interrater agreement, κ=0.67, z=103.07 (P<0.01); singing voice teachers demonstrating a moderate interrater agreement, κ=0.53, z=79.10 (P<0.01); and inexperienced listeners demonstrating a fair interrater agreement, κ=0.24, z=35.82 (P<0.01).
Conclusions: Experienced listeners demonstrated a higher interrater agreement as compared with inexperienced listeners, with speech-language pathologists demonstrating a superior agreement as compared with all groups.
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