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Time course of talker adaptation
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Abstract:
Despite the ambiguous many-to-many mapping between acoustic signals and target phonemes, human listeners quickly overcome and adapt to inconsistencies during speech perception. However, the processing cost of speech perception increases when a change of the talker occurs and preceding context speech was found to reduce the processing cost. The magnitude of the response time difference between the single- and mixed-talker condition is called the interference effect. The literature indicates that that the interference effect is reduced by increasing length of speech context preceding target speech, but the quantity of the information embedded in that speech context does not further impact processing cost. In this study, we further explored the relationship between the duration of the preceding speech context and its facilitative effect in talker adaptation. The results indicated that even though response times were always shorter in the single-talker condition than the mixed-talker condition, the facilitative effect of preceding context speech became constant for durations longer than beyond 600ms, rather than eventually eliminating the interference effect at some carrier phrase of sufficient duration. Therefore, wo mechanisms are proposed to subserve talker adaptation: a feed-forward, extrinsic process that reduces the interference effect by integrating prior speech context of up to 600ms, and a top-down, intrinsic process that unfolds over longer timescales by allocating cognitive resources to cope with potential talker variability, leading to a global processing time increase.
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Keyword:
Speech therapy
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URL: https://hdl.handle.net/2144/38124
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4 |
Effects of type, token, and talker variability in speech processing efficiency
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Common cortical architectures for phonological working memory identified in individual brains
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In: Neuroimage (2019)
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Time and information in perceptual adaptation to speech
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In: Cognition (2019)
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Acoustic and linguistic factors affecting perceptual dissimilarity judgments of voices
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In: J Acoust Soc Am (2019)
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Effects of talker continuity and speech rate on auditory working memory
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Hierarchical contributions of linguistic knowledge to talker identification: Phonological vs. lexical familiarity
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Persistent Neurobehavioral Markers of Developmental Morphosyntax Errors in Adults
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In: J Speech Lang Hear Res (2019)
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Noninvasive neurostimulation of left temporal lobe disrupts rapid talker adaptation in speech processing
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In: Brain Lang (2019)
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