Correlation between nasalance and nasality in children with hypernasality
Correlação entre nasalância e nasalidade em crianças com hipernasalidade
Maria Inês Pegoraro-Krook; Viviane Cristina de Castro Marino; Luciana Silva; Jeniffer de Cássia Rillo Dutka
Abstract
Purpose: to correlate nasalance scores and speech nasality of operated unilateral cleft lip and palate children.
Methods: this prospective study involved auditory perceptual identification of nasality by three experienced speech-language pathologists who judged recorded phrases produced by 79 children (mean age of 6y5m), all speakers of Brazilian Portuguese. Nasalance measures obtained simultaneously to audio recordings were also analyzed. The speech samples included two sentences, one with [p] and another with [b] sounds. Inter-judgment agreement for the total (N=158) phrases judged by the speech-language pathologists was obtained (78.5% for [p] and 93.5% for [b]). Intra-judgment agreement for duplicated sentences was 82% for [p] and 86% for b] sounds. The speech-language pathologists were then instructed to judge individually speech nasality of the 178 phrases using a 4 points scale. Nasalance scores for these 158 phrases were then obtained. Mean speech nasality and nasalance scores were correlated.
Results: mean values of 1.53 and 1.52 (indicative of mild hypernasality) were obtained for the [p] and [b] phrases, respectively, from perceptual judgments. Mean nasalance scores were 32% ([p] phrase) e 39% ([b] phrase). Although significant, low correlation was found between speech nasality and nasalance scores for the two investigated phrases ([p]; r= 0,31; p=0,004; [b]; r= 0,37;p=0,0007).
Conclusion: mild hypernasality as identified in the speech of children with cleft palate may disfavor correlation findings between speech nasality and nasalance scores. Longer speech stimuli and samples including higher degrees of hypernasality are recommended for future studies.
Keywords
Resumo
Objetivo: estabelecer a correlação entre medidas de nasalância e de nasalidade de fala apresentada por crianças com fissura labiopalatina operada.
Métodos: estudo prospectivo, em que as gravações de áudio de frases produzidas por 79 crianças (idade média 6,5 anos) falantes do português brasileiro foram julgadas auditivamente por três fonoaudiólogas. Medidas de nasalância obtidas simultaneamente às gravações áudio também foram analisadas. As amostras de fala incluíram duas frases, uma constituída por [p] e outra por [b], em recorrência. A concordância interjuízes foi obtida para as 158 frases (78,5% para [p] e 93,5% para [b]). A concordância intrajuízes também foi verificada para as frases duplicadas (82% para [p] e 86% para [b]). Os fonoaudiólogos classificaram individualmente a nasalidade de fala das 158 frases utilizando uma escala de 4 pontos. Valores de nasalância destas mesmas frases foram calculados. Os valores médios da nasalidade de fala foram correlacionados como os escores de nasalância.
Resultados: valores médios de 1,53 e 1,52 (indicativo de hipernasalidade leve) foram obtidos para as frases [p] e [b], a partir dos julgamentos perceptivos. Os valores médios de nasalância foram 32% (frase [p]) e 39% (frase [b]). Embora significantes, houve correlação baixa entre nasalidade e nasalância para as duas frases (/p/; r= 0,31 p=0,004 e /b/; r= 0,37 p=0,0007).
Conclusão: quando classificada como leve, a hipernasalidade de fala apresentada por crianças com fissura labiopalatina pode desfavorecer entre nasalância e nasalidade. Estímulos de fala mais longos e amostras representativas de graus mais elevados de hipernasalidade são recomendados para futuros estudos.
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Referencias
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Submitted date:
15/08/2013
Accepted date:
13/01/2014
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