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Speech Elicitation Methods for Measuring Articulatory Control.

Claudia I Abbiati1, Kimberly R Bauerly1, Shelley L Velleman1

  • 1Department of Communication Sciences and Disorders, University of Vermont, Burlington.

Journal of Speech, Language, and Hearing Research : JSLHR
|October 23, 2023
PubMed
Summary
This summary is machine-generated.

Elicitation methods significantly impact spatiotemporal index (STI) values. Pseudorandom repetitions yield higher lip aperture STI (LA STI) than consecutive ones, highlighting the need for standardized speech-motor control research methods.

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Area of Science:

  • Speech-language pathology
  • Motor control research
  • Acoustic phonetics

Background:

  • Spatiotemporal index (STI) quantifies articulatory variability in speech-motor control.
  • Inconsistent elicitation methods across studies complicate STI interpretation.
  • Standardization is needed for reliable STI measurement.

Purpose of the Study:

  • To investigate the influence of different elicitation methods on STI values.
  • To determine if repetition type affects lip aperture STI (LA STI).
  • To assess the impact of stimulus presentation type on LA STI.

Main Methods:

  • Lip aperture STI (LA STI) calculated for 19 young adults.
  • Productions elicited using a 2x2 design: consecutive vs. pseudorandom repetitions and auditory vs. auditory/visual stimuli.
  • Counterbalanced condition order across participants.

Main Results:

  • Repetition type significantly affected LA STI (p < .001).
  • Pseudorandom repetitions yielded higher mean LA STI than consecutive repetitions.
  • Stimulus presentation type (auditory vs. auditory/visual) did not significantly impact LA STI.

Conclusions:

  • Elicitation methods, specifically repetition type, significantly influence LA STI.
  • Researchers must consider these methodological effects when measuring LA STI.
  • Standardized protocols are crucial for consistent and comparable speech-motor control research.