期刊
NEUROPSYCHOLOGIA
卷 114, 期 -, 页码 158-167出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuropsychologia.2017.12.007
关键词
Dual-stream theory; Auditory feedback; Speech production; Speech Perception; Frequency-altered feedback; Pitch-shift reflex; Response thresholds
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [283202]
Previous studies suggest that a perception-action dissociation exists for the cortical processing of vocal pitch, because speakers compensate for small vocal errors without awareness. In this event-related potential (ERP) study, participants vocalized while hearing their productions either altered or unaltered in pitch, and reported whether their auditory feedback was altered. Pitch alterations as small as 10 cents resulted in compensatory vocal responses, while participants reported hearing perturbations that were 15 cents and larger. Similarly, P1 ERP responses were elicited by perturbations 15 cents and larger, while N1 responses followed a linear trend with increasing perturbation magnitudes, and P2 responses were elicited by perturbations 30 cents and larger. Although their thresholds differed, both motor and perceptual responses were elicited by small frequency altered feedback (FAF) perturbations. Previous reports of a perception-action dissociation may reflect differences in the magnitude of vocal error required to elicit a motor response, and for an individual to report a pitch change, rather than to detect a pitch change (as reflected by ERP responses).
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