TITLE

The Speech Focus Position Effect on Jaw-Finger Coordination in a Pointing Task

AUTHOR(S)
Rochet-Capellan, Amélie; Laboissière, Rafael; Galván, Arturo; Schwartz, Jean-Luc
PUB. DATE
December 2008
SOURCE
Journal of Speech, Language & Hearing Research;Dec2008, Vol. 51 Issue 6, p1507
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Purpose: This article investigates jaw-finger coordination in a task involving pointing to a target while naming it with a 'CVCV (e.g., /'papa/) versus CV'CV (e.g., /pa 'pa/) word. According to the authors' working hypothesis, the pointing apex (gesture extremum) would be synchronized with the apex of the jaw-opening gesture corresponding to the stressed syllable. Method: Jaw and finger motions were recorded using Optotrak (Northern Digital, Waterloo, Ontario, Canada). The effects of stress position on jaw-finger coordination were tested across different target positions (near vs. far) and different consonants in the target word (/t/ vs. /p/). Twenty native Portuguese Brazilian speakers participated in the experiment (all conditions). Results: Jaw response starts earlier, and finger-target alignment period is longer for CV 'CV words than for 'CVCV ones. The apex of the jaw-opening gesture for the stressed syllable appears synchronized with the onset of the finger-target alignment period (corresponding to the pointing apex) for 'CVCV words and with the offset of that period for CV' CV words. Conclusions: For both stress conditions, the stressed syllable occurs within the finger-target alignment period because of tight finger-jaw coordination. This result is interpreted as evidence for an anchoring of the speech deictic site (part of speech that shows) in the pointing gesture.
ACCESSION #
35974471

 

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