Neurophysiological Indices of Speech and Nonspeech Stimulus Processing.
Saved in:
| Title: | Neurophysiological Indices of Speech and Nonspeech Stimulus Processing. |
|---|---|
| Authors: | Tampas, Joanna W.1, Harkrider, Ashley W.1 aharkrid@utk.edu, Hedrick, Mark S.1 |
| Source: | Journal of Speech, Language & Hearing Research. Oct2005, Vol. 48 Issue 5, p1147-1164. 18p. |
| Subject Terms: | *Speech perception, *Auditory perception, Evoked potentials (Electrophysiology), Phonetics, Linguistics |
| Abstract: | Auditory event-related potentials (mismatch negativity and P300) and behavioral discrimination were measured to synthetically generated consonant-vowel (CV) speech and nonspeech contrasts in 10 young adults with normal auditory systems. Previous research has demonstrated that behavioral and P300 responses reflect a phonetic, categorical level of processing. The aims of the current investigation were (a) to examine whether the mismatch negativity (MMN) response is also influenced by the phonetic characteristics of a stimulus or if it reflects purely an acoustic level of processing and (b) to expand our understanding of the neurophysiology underlying categorical perception, a phenomenon crucial in the processing of speech. The CVs were 2 within-category stimuli and the nonspeech stimuli were 2 glides whose frequency ramps matched the formant transitions of the CV stimuli. Listeners exhibited better behavioral discrimination to the nonspeech versus speech stimuli in same/different and oddball behavioral paradigms. MMN responses were elicited by the nonspeech stimuli, but absent to CV speech stimuli. Larger amplitude and earlier P300s were elicited by the nonspeech stimuli, while smaller and longer latency P300s were elicited by the speech stimulus contrast. Results suggest that the 2 types of stimuli were processed differently when measured behaviorally, with MMN, or P300. The better discrimination and clearer neurophysiological representation of the frequency glide, nonspeech stimuli versus the CV speech stimuli of analogous acoustic content support (a) categorical perception representation at the level of the MMN generators and (b) parallel processing of acoustic (sensory) and phonetic (categorical) information at the level of the MMN generators. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Education Research Complete |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
|---|---|
| Header | DbId: ehh DbLabel: Education Research Complete An: 19434719 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Neurophysiological Indices of Speech and Nonspeech Stimulus Processing. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Tampas%2C+Joanna+W%2E%22">Tampas, Joanna W.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Harkrider%2C+Ashley+W%2E%22">Harkrider, Ashley W.</searchLink><relatesTo>1</relatesTo><i> aharkrid@utk.edu</i><br /><searchLink fieldCode="AR" term="%22Hedrick%2C+Mark+S%2E%22">Hedrick, Mark S.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Speech%2C+Language+%26+Hearing+Research%22">Journal of Speech, Language & Hearing Research</searchLink>. Oct2005, Vol. 48 Issue 5, p1147-1164. 18p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Speech+perception%22">Speech perception</searchLink><br />*<searchLink fieldCode="DE" term="%22Auditory+perception%22">Auditory perception</searchLink><br /><searchLink fieldCode="DE" term="%22Evoked+potentials+%28Electrophysiology%29%22">Evoked potentials (Electrophysiology)</searchLink><br /><searchLink fieldCode="DE" term="%22Phonetics%22">Phonetics</searchLink><br /><searchLink fieldCode="DE" term="%22Linguistics%22">Linguistics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Auditory event-related potentials (mismatch negativity and P300) and behavioral discrimination were measured to synthetically generated consonant-vowel (CV) speech and nonspeech contrasts in 10 young adults with normal auditory systems. Previous research has demonstrated that behavioral and P300 responses reflect a phonetic, categorical level of processing. The aims of the current investigation were (a) to examine whether the mismatch negativity (MMN) response is also influenced by the phonetic characteristics of a stimulus or if it reflects purely an acoustic level of processing and (b) to expand our understanding of the neurophysiology underlying categorical perception, a phenomenon crucial in the processing of speech. The CVs were 2 within-category stimuli and the nonspeech stimuli were 2 glides whose frequency ramps matched the formant transitions of the CV stimuli. Listeners exhibited better behavioral discrimination to the nonspeech versus speech stimuli in same/different and oddball behavioral paradigms. MMN responses were elicited by the nonspeech stimuli, but absent to CV speech stimuli. Larger amplitude and earlier P300s were elicited by the nonspeech stimuli, while smaller and longer latency P300s were elicited by the speech stimulus contrast. Results suggest that the 2 types of stimuli were processed differently when measured behaviorally, with MMN, or P300. The better discrimination and clearer neurophysiological representation of the frequency glide, nonspeech stimuli versus the CV speech stimuli of analogous acoustic content support (a) categorical perception representation at the level of the MMN generators and (b) parallel processing of acoustic (sensory) and phonetic (categorical) information at the level of the MMN generators. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=ehh&AN=19434719 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1044/1092-4388(2005/081) Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1147 Subjects: – SubjectFull: Speech perception Type: general – SubjectFull: Auditory perception Type: general – SubjectFull: Evoked potentials (Electrophysiology) Type: general – SubjectFull: Phonetics Type: general – SubjectFull: Linguistics Type: general Titles: – TitleFull: Neurophysiological Indices of Speech and Nonspeech Stimulus Processing. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Tampas, Joanna W. – PersonEntity: Name: NameFull: Harkrider, Ashley W. – PersonEntity: Name: NameFull: Hedrick, Mark S. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2005 Type: published Y: 2005 Identifiers: – Type: issn-print Value: 10924388 Numbering: – Type: volume Value: 48 – Type: issue Value: 5 Titles: – TitleFull: Journal of Speech, Language & Hearing Research Type: main |
| ResultId | 1 |
