A preliminary exploration of conversation sampling in pediatric voice disorders

Current methods of eliciting running speech for subjective rating, or perceptual analysis, in the assessment of pediatric voice disorders are not standardized. Whilst different assessment tools have different requirements, a commonality is the requirement to judge the perceptual characteristics of the individual's everyday speaking voice. However, it is unclear whether current practices yield ecologically valid running speech samples. The aim of this study was to analyse the length and characteristics of conversational responses, to stimuli that were designed to elicit running speech samples from pediatric clients.

Twenty conversations, conducted as part of the evaluation of voice in a pediatric population, were analysed. Length of responses, number of responses and question types were recorded.

The median maximum utterance length was 15.9 s; seven participants presented with a maximum of less than 10 s. Response length was significantly associated with question type, F = 10.68, p<.001. The most frequent number of responses produced was 11 (range = 17, IQR = 5, 11). There was a moderate correlation between response length and number of responses, r(18)=.53, p=.02.

These data demonstrated that informal conversational methods did not consistently yield running speech samples of greater than 10 s in length, the minimum sample length recommended by the CAPE-V protocol. There was considerable variability in the characteristics of the responses produced by participants. Using a task such as a narrative re-tell might allow for better standardization of responses, including elicitation of vocal behaviors of interest, as well as yield a longer sample.