Effects of Knowledge of Task on Control of Oral-Nasal Balance in Speech.

Introduction: Previous research has shown that altering the nasal signal level auditory feedback changed the control of oral-nasal balance in normal speakers. The present study investigated whether knowledge of the task and the instruction not to compensate would change the participants' response to...

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Published in:Folia Phoniatrica et Logopaedica Vol. 73; no. 1; pp. 15 - 22
Main Authors: Srinivas, Varsha, Bressmann, Tim
Format: research tables/charts Journal Article
Published: Karger AG 2021
Online Access:View this record in EBSCOhost
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      pub: Karger AG
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        10.1159/000503861
        148109773
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        atl: Effects of Knowledge of Task on Control of Oral-Nasal Balance in Speech.
      aug:
        au:
          Srinivas, Varsha
          Bressmann, Tim
        affil: Department of Speech Language Pathology, University of Toronto, Toronto, Ontario, Canada
      sug:
        subj:
          Speech Perception Evaluation
          Voice Quality Evaluation
          Speech Production Measurement
          Knowledge
          Task Performance and Analysis
          Psychomotor Performance
          Human
          Male
          Female
          Repeated Measures
          Analysis of Variance
          Post Hoc Analysis
          Feedback
          Comparative Studies
          Experimental Studies
          Descriptive Statistics
          Male
          Female
      ab: Introduction: Previous research has shown that altering the nasal signal level auditory feedback changed the control of oral-nasal balance in normal speakers. The present study investigated whether knowledge of the task and the instruction not to compensate would change the participants' response to the manipulation. Methods: Twenty participants (10 females) in 2 groups continuously repeated a sentence while their nasal signal level was increased or decreased and fed back to them via headphones, so the speakers heard themselves as more or less nasal, respectively. After the first recording session, participants were debriefed about the true nature of the experiment. They were instructed not to compensate in the second recording session. The outcome measures were the percentage changes of nasalance scores from the first baseline. Results: Statistical analysis using a repeated measures analysis of variance showed an effect of the nasal signal level, F(5,80) = 2.51, p = 0.049, and a nasal signal level by knowledge of task interaction effect, F(5,80) = 3.25, p = 0.019. Post hoc tests showed that the maximum nasal signal level auditory feedback resulted in a significant decrease of nasality from the initial baseline. Conclusion: Despite knowledge of the task, speakers were unable to resist compensating. As found in previous research, there was a numerically higher compensation response at the maximum than at the minimum nasal signal level auditory feedback condition.
      pubtype: Academic Journal
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        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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