Objective: The purpose of this study was to determine whether age and vowel contexts influence test-retest nasalance score variability in typically developing Korean children. Participants: Forty-five 3- to 5-year-old children with normal speech and resonance participated in the study. Methods: All subjects were asked to repeat three 4-syllable speech stimuli in high, low, or mixed vowel contexts twice after the examiner. An immediate test-retest nasalance score was assessed with no headgear change. Test and retest variability in nasalance scores was examined based on the absolute difference in nasalance scores of the first and second repetition for each stimulus. Results: A significant main effect of the vowel context on variability in nasalance scores was found, but the effect of age on nasalance variability was not significant. Mean absolute difference in nasalance scores for the stimuli in the high vowel contexts was significantly greater than for the stimuli in the low and mixed vowel contexts. Conclusions: The results suggested that variability in nasalance scores might not decrease with age and tend to show considerable individual variations. Increased variability in nasalance scores in the high vowel context might be associated with aerodynamic and acoustic characteristics resulting from physiological aspects of the vowel /i/.
This study aims to investigate whether test-retest nasalance scores are different between children and adults and influenced by vowel context and stimulus length. Methods: The participants were twenty adults and thirty children age 4 to 5 years with normal speech. They repeated each speech stimulus twice after an examiner without headgear reposition. The speech stimuli consisted of 4-, 8-, 16-, and 31-syllable sets and each set was loaded with high, low, and mixed vowels. Absolute differences between the nasalance scores from the first and second recordings were obtained to see the effect of vowel context and stimulus length on variability in nasalance between the groups. Results: Variability in nasalance scores was influenced by vowel context and stimulus length and there was no significant difference between children and adults. There were no significant interactions between the variables. Post hoc tests revealed that nasalance difference scores in the high vowel context were greater than those in the low and the mixed vowel contexts. Also, 4-syllable stimuli showed greater nasalance differences scores than 16-and 31-syllable stimuli. More adults and children exhibited greater than 5 nasalance difference points for the 4-syllable stimulus in the high vowel context. Conclusion: The study suggested that test-retest nasalance variability would become greater as the ratio of the high vowels increases and stimulus length is shorter. For clinical purposes, it is necessary to measure nasalance scores at least twice for the identical speech stimuli.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.