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Context influence on speech perception : evidence for acoustic-level mechanism across the voice onset time continuum

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Titel: Context influence on speech perception : evidence for acoustic-level mechanism across the voice onset time continuum
Autoren: Liu, Shun, Liu, Xiqin
Verlagsinformationen: Elsevier
Publikationsjahr: 2025
Bestand: JYX - Jyväskylä University Digital Archive / Jyväskylän yliopiston julkaisuarkisto
Schlagwörter: top-down effect, speech perception, acoustic level, EEG, multivariate decoding, konteksti, puhe (puhuminen), puheentuotto
Beschreibung: Contextual information plays a significant role in shaping our perception of speech, yet it remains uncertain at which level of processing such information integrates with acoustic cues. A key area of debate is whether top-down information influences acoustic encoding within the lower levels of the speech-processing hierarchy. This study employed a machine learning algorithm to decode the voice onset time (VOT) of speech and investigated how the gender of the speaker of a precursor sentence impacted subsequent speech perception. Using EEG recordings, we examined neural responses to a VOT continuum following male and female voices. Our results reveal that a linear representation of the VOT continuum emerged at an early EEG time window and that gender-based contextual cues modulated speech perception at this stage. Notably, since context information was not involved in the decoding procedure itself, we conclude that this modulation reflected the true effects of context on the perception of VOT. Moreover, the contextual influence extended across the entire VOT continuum, not just at specific sounds, suggesting a broad and consistent modulation of speech perception by gender-based context. These findings support the idea of a general acoustic-level mechanism through which contextual information influences the early stage of speech processing, contributing to ongoing debates about the interaction between top-down and bottom-up processes in speech perception. ; peerReviewed
Publikationsart: article in journal/newspaper
Dateibeschreibung: application/pdf; fulltext
Sprache: English
ISSN: 1053-8119
Relation: Neuroimage; 310
Verfügbarkeit: http://urn.fi/URN:NBN:fi:jyu-202503192643
Rights: CC BY 4.0 ; © 2025 the Authors ; openAccess ; https://creativecommons.org/licenses/by/4.0/
Dokumentencode: edsbas.E7FC5CCF
Datenbank: BASE
Beschreibung
Abstract:Contextual information plays a significant role in shaping our perception of speech, yet it remains uncertain at which level of processing such information integrates with acoustic cues. A key area of debate is whether top-down information influences acoustic encoding within the lower levels of the speech-processing hierarchy. This study employed a machine learning algorithm to decode the voice onset time (VOT) of speech and investigated how the gender of the speaker of a precursor sentence impacted subsequent speech perception. Using EEG recordings, we examined neural responses to a VOT continuum following male and female voices. Our results reveal that a linear representation of the VOT continuum emerged at an early EEG time window and that gender-based contextual cues modulated speech perception at this stage. Notably, since context information was not involved in the decoding procedure itself, we conclude that this modulation reflected the true effects of context on the perception of VOT. Moreover, the contextual influence extended across the entire VOT continuum, not just at specific sounds, suggesting a broad and consistent modulation of speech perception by gender-based context. These findings support the idea of a general acoustic-level mechanism through which contextual information influences the early stage of speech processing, contributing to ongoing debates about the interaction between top-down and bottom-up processes in speech perception. ; peerReviewed
ISSN:10538119