Speaking rhythmically can shape hearing

M. Florencia Assaneo (), Johanna M. Rimmele (), Yonatan Sanz Perl and David Poeppel
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M. Florencia Assaneo: New York University
Johanna M. Rimmele: Max-Planck-Institute for Empirical Aesthetics
Yonatan Sanz Perl: University of Buenos Aires
David Poeppel: New York University

Nature Human Behaviour, 2021, vol. 5, issue 1, 71-82

Abstract: Abstract Evidence suggests that temporal predictions arising from the motor system can enhance auditory perception. However, in speech perception, we lack evidence of perception being modulated by production. Here we show a behavioural protocol that captures the existence of such auditory–motor interactions. Participants performed a syllable discrimination task immediately after producing periodic syllable sequences. Two speech rates were explored: a ‘natural’ (individually preferred) and a fixed ‘non-natural’ (2 Hz) rate. Using a decoding approach, we show that perceptual performance is modulated by the stimulus phase determined by a participant’s own motor rhythm. Remarkably, for ‘natural’ and ‘non-natural’ rates, this finding is restricted to a subgroup of the population with quantifiable auditory–motor coupling. The observed pattern is compatible with a neural model assuming a bidirectional interaction of auditory and speech motor cortices. Crucially, the model matches the experimental results only if it incorporates individual differences in the strength of the auditory–motor connection.

Date: 2021
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DOI: 10.1038/s41562-020-00962-0

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