Listeners normalize speech for contextual speech rate even without an explicit recognition task
until further notice
SourceThe Journal of the Acoustical Society of America, 146, 1, (2019), pp. 179-188
Article / Letter to editor
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SW OZ DCC PL
PI Group Neurobiology of Language
The Journal of the Acoustical Society of America
SubjectPsycholinguistics; Language in Interaction
Speech can be produced at different rates. Listeners take this rate variation into account by normalizing vowel duration for contextual speech rate: An ambiguous Dutch word /m?t/ is perceived as short /mɑt/ when embedded in a slow context, but long /ma:t/ in a fast context. While some have argued that this rate normalization involves low-level automatic perceptual processing, there is also evidence that it arises at higher-level cognitive processing stages, such as decision making. Prior research on rate-dependent speech perception has only used explicit recognition tasks to investigate the phenomenon, involving both perceptual processing and decision making. This study tested whether speech rate normalization can be observed without explicit decision making, using a cross-modal repetition priming paradigm. Results show that a fast precursor sentence makes an embedded ambiguous prime (/m?t/) sound (implicitly) more /a:/-like, facilitating lexical access to the long target word "maat" in a (explicit) lexical decision task. This result suggests that rate normalization is automatic, taking place even in the absence of an explicit recognition task. Thus, rate normalization is placed within the realm of everyday spoken conversation, where explicit categorization of ambiguous sounds is rare.
NWO (Grant code:info:eu-repo/grantAgreement/NWO/Gravitation/024.001.006)
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