In Spoken Word Recognition, the Future Predicts the Past

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
Laura GwilliamsAlec Marantz

Abstract

Speech is an inherently noisy and ambiguous signal. To fluently derive meaning, a listener must integrate contextual information to guide interpretations of the sensory input. Although many studies have demonstrated the influence of prior context on speech perception, the neural mechanisms supporting the integration of subsequent context remain unknown. Using MEG to record from human auditory cortex, we analyzed responses to spoken words with a varyingly ambiguous onset phoneme, the identity of which is later disambiguated at the lexical uniqueness point. Fifty participants (both male and female) were recruited across two MEG experiments. Our findings suggest that primary auditory cortex is sensitive to phonological ambiguity very early during processing at just 50 ms after onset. Subphonemic detail is preserved in auditory cortex over long timescales and re-evoked at subsequent phoneme positions. Commitments to phonological categories occur in parallel, resolving on the shorter timescale of ∼450 ms. These findings provide evidence that future input determines the perception of earlier speech sounds by maintaining sensory features until they can be integrated with top-down lexical information.SIGNIFICANCE STATEMENT The percepti...Continue Reading

Citations

Aug 8, 2018·PloS One·Zachary BurchillT Florian Jaeger
Dec 17, 2019·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Laura Gwilliams
Feb 29, 2020·Journal of Cognitive Neuroscience·Andrea E Martin
Aug 9, 2020·Wiley Interdisciplinary Reviews. Cognitive Science·Laura M Getz, Joseph C Toscano
Sep 2, 2020·ELife·Laura Gwilliams, Jean-Remi King
Aug 6, 2019·Frontiers in Neuroscience·Lindsey RoqueSamira Anderson
Jul 4, 2020·Open Mind : Discoveries in Cognitive Science·Adam King, Andrew Wedel
Jan 10, 2021·Scientific Reports·Esti Blanco-ElorrietaLiina Pylkkänen
Jan 20, 2021·Journal of Cognitive Neuroscience·Gavin M BidelmanAshleigh Harrison
Mar 9, 2021·Psychological Research·T M Vanessa ChanClaude Alain
Mar 9, 2021·Frontiers in Human Neuroscience·Alycia E CummingsDiane A Ogiela
Mar 30, 2021·Topics in Cognitive Science·Meredith BrownLaura Dilley
Aug 17, 2021·Neurobiology of Language·Sara D BeachDimitrios Pantazis
Aug 28, 2021·Journal of Cognitive Neuroscience·Gavin M BidelmanAshleigh Harrison
Nov 16, 2020·Brain Research·T M Vanessa Chan, Claude Alain

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