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| Research article summary (published 30 Mar 2002): |
Sensorimotor adaptation of speech I: Compensation and adaptation.
Full Abstract
When motor actions (e.g., reaching with your hand) adapt to altered sensory feedback (e.g., viewing a shifted image of your hand through a prism), the phenomenon is called sensorimotor adaptation (SA). In the study reported here, SA was observed in speech. In two 2-hour experiments (adaptation and control), participants whispered a variety of CVC words. For those words containing the vowel /E/, participants heard auditory feedback of their whispering. A DSP-based vocoder processed the participants' auditory feedback in real time, allowing the formant frequencies of participants' auditory speech feedback to be shifted. In the adaptation experiment, formants were shifted along one edge of the vowel triangle. For half the participants, formants were shifted so participants heard /a/ when they produced /E/; for the other half, the shift made participants hear /i/ when they produced /E/. During the adaptation experiment, participants altered their production of /E/ to compensate for the altered feedback, and these production changes were retained when participants whispered with auditory feedback blocked by masking noise. In a control experiment, in which the formants were not shifted, participants' production changes were small and inconsistent. Participants exhibited a range of adaptations in response to the altered feedback, with some participants adapting almost completely, and other participants showing very little or no adaptation.
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Author information
Author/s: Houde, John F (JF); Jordan, Michael I (MI);
Affiliation: Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, USA. houde@phy.ucsf.edu
Journal and publication information
Publication Type: Journal Article
Journal: Journal of speech, language, and hearing research : JSLHR (J Speech Lang Hear Res), published in United States. (Language: eng)
Reference: 2002-Apr; vol 45 (issue 2) : pp 295-310
Dates: Created 2002/05/10; Completed 2002/11/04; Revised 2004/11/17;
PMID: 12003512, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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