French-Language Adaptation of the Consensus Auditory-Perceptual Evaluation of Voice (CAPE-V)

This study aimed to adapt the Consensus Auditory-Perceptual Evaluation of Voice (CAPE-V) protocol for perceptual voice assessment to the French language. The primary objective was to achieve consensus among an international panel of voice experts on the content of the adapted protocol.

To ensure the relevance and robustness of the French CAPE-V protocol, this study employed a systematic Delphi method and involved an international panel primarily comprising speech therapists and lecturers from France and Belgium. The multi-stage process included an initial panel size of 15 experts. Three rounds of online questionnaires, integrating both quantitative and qualitative data collection, were conducted. Participants provided feedback and ratings on various protocol elements until a consensus was reached. Adaptations targeted the choice of task stimuli (sustained vowel, sentence reading, semi-spontaneous speech), of the rating scales, and vocal quality terminology.

The Delphi process achieved consensus on all elements of the adapted CAPE-V protocol. Notably, the sustained vowel task saw consensus in favor of the vowel /a/. Sentence adaptations achieved substantial agreement, with the final set unanimously approved. The simple Visual Analog Scale emerged as the preferred rating scale. Agreement on terms for describing vocal qualities marked a crucial step in establishing a shared vocabulary among French-speaking voice experts.

The study successfully adapted the CAPE-V protocol for perceptual voice assessment to the French language through a systematic Delphi process. The final protocol closely resembles the original English version, maintaining its structure and core objectives. Consensus on sustained vowel tasks, sentence adaptations, rating scales, and vocal quality terminology indicates the relevance and robustness of the adapted protocol. Ongoing validation studies in France demonstrate the potential clinical utility of the adapted CAPE-V in French-speaking contexts, representing a significant step toward standardized and validated voice assessment tools for clinicians and researchers globally.