Some effects of laboratory training on identification and discrimination of voicing contrasts in stop consonants.
Open accessAbstract
For many years there has been a consensus that early linguistic experience exerts a profound and often permanent effect on the perceptual abilities underlying the identification and discrimination of stop consonants. It has also been concluded that selective modification of the perception of stop consonants cannot be accomplished easily and quickly in the laboratory with simple discrimination training techniques. In the present article we report the results of three experiments that examined the perception of a three-way voicing contrast by naive monolingual speakers of English. Laboratory training procedures were implemented with a small computer in a real-time environment to examine the perception of voiced, voiceless unaspirated, and voiceless aspirated stops differing in voice onset time. Three perceptual categories were present for most subjects after only a few minutes of exposure to the novel contrast. Subsequent perceptual tests revealed reliable and consistent labeling and categorical-like discrimination functions for all three voicing categories, even though one of the contrasts is not phonologically distinctive in English. The present results demonstrate that the perceptual mechanisms used by adults in categorizing stop consonants can be modified easily with simple laboratory techniques in a short period of time.
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Our work suggests that it is more difficult, but still possible, to learn to differentiate nonnative place of articulation distinctions.
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Floccia, C., & Bertoncini, J. (1993) · Advances in psychology · doi:10.1016/s0166-4115(08)61667-2 · Cited by 3 · see citing works
Jügler, J., Zimmerer, F., Möbius, B., & Draxler, C. (2015) · Interspeech (USB) · doi:10.21437/interspeech.2015-255 · Cited by 3 · see citing works
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Wiener, S., Murphy, T. K., & Holt, L. L. (2025) · Language Learning · doi:10.1111/lang.12700 · Cited by 2 · see citing works
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Kawai, N., & Carrell, T. D. (2012) · Perceptual and Motor Skills · doi:10.2466/24.28.pms.114.1.189-203 · Cited by 2 · see citing works
Zahid, M. (2002) · International Conference on Spoken Language Processing (ICSLP) · doi:10.1109/icslp.1996.607310 · Cited by 2 · see citing works
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Collet, G., Colin, C., Willy Serniclaes, A., Hoonhorst, I., Markessis, E., Deltenre, P., & Leybaert, J. (2013) · Applied Psycholinguistics · doi:10.1017/s0142716413000313 · Cited by 2 · see citing works
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Strange, W., Polka, L., & Dittmann, S. (1986) · Bulletin of the Psychonomic Society · doi:10.3758/bf03330569 · Cited by 1 · see citing works
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Schoenherr, J. R. (2014) · doi:10.22215/etd/2014-10362 · Cited by 1 · see citing works
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Tan, M., & Jaeger, T. F. (2024) · SSRN Electronic Journal · doi:10.2139/ssrn.4885307 · Cited by 1 · see citing works
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Boggs, G. J. (2005) · IEEE International Conference on Acoustics Speech and Signal Processing · doi:10.1109/icassp.1983.1171919
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Wong, P. C. M. (2005) · Perspectives on Neurophysiology and Neurogenic Speech and Language Disorders · doi:10.1044/nnsld15.2.15
Japanese Listeners’ Judgments of Prolongations: With Focus on the Effect of Phonemic Length Contrast
Kang, M., Chung, I., & Park, J. (2020) · Audiology and Speech Research · doi:10.21848/asr.200047
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McMurray, B., & Chiu, S. L. (2020) · doi:10.31234/osf.io/rzbfu
Yavas, M. S. (2011) · doi:10.1002/9781444392623.refs
- Authors
- Pisoni, D. B., Aslin, R. N., Perey, A. J., & Hennessy, B. L.
- Affiliations
- Indiana University Bloomington (US)
- ORCID
- Pisoni, David B.
- Venue
- Journal of Experimental Psychology: Human Perception and Performance
- Published
- 1982
- Volume
- 8
- Issue
- 2
- Pages
- 297-314
- ISSN
- 0096-1523 (ISSN-L)
- 1939-1277
- PMC
- PMC3495319
- OpenAlex
- W1993119641
- Cited by
- 201
- References
- 0
- Citations by year
- 2025: 2 · 2024: 2 · 2021: 4 · 2020: 5 · 2019: 5 · 2018: 5 · 2017: 5 · 2016: 2 · 2015: 7 · 2014: 6 · 2013: 22 · 2012: 5
- FWCI
- 4.08
- Type
- journal article
- Language
- en
- Update notices
- correction (2006-03-29)
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Journal of Experimental Psychology Human Perception & Performance (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Massachusetts Institute of Technology
- National Institutes of Health (5r01dc000111-38)
- National Institute of Mental Health
- National Institute of Child Health and Human Development
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Phonetics and Phonology Research
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Categorization, perception, and language
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neuroscience and Music Perception
- Keywords
- voicing contrast, stop consonants, voice onset time, perceptual learning, discrimination training, categorical perception, phonetic categories, English speakers, aspirated stops, voiceless stops
- MeSH terms
- Adult, Feedback, Female, Humans, Male, Phonetics, Speech Discrimination Tests, Speech Perception
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