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Modeling individual preferences reveals that face beauty is not universally perceived across cultures
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In: Curr Biol (2021)
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Cortical tracking of speech in noise accounts for reading strategies in children
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Simple acoustic features can explain phoneme-based predictions of cortical responses to speech
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Simple Acoustic Features Can Explain Phoneme-Based Predictions of Cortical Responses to Speech
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Data from: Contributions of local speech encoding and functional connectivity to audio-visual speech perception ...
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Contributions of local speech encoding and functional connectivity to audio-visual speech perception
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In: ISSN: 2050-084X ; EISSN: 2050-084X ; eLife ; https://hal.archives-ouvertes.fr/hal-02440721 ; eLife, eLife Sciences Publication, 2017, 6, https://elifesciences.org/articles/24763. ⟨10.7554/eLife.24763⟩ (2017)
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Contributions of local speech encoding and functional connectivity to audio-visual speech perception ...
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Contributions of local speech encoding and functional connectivity to audio-visual speech perception
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Auditory cortical delta-entrainment interacts with oscillatory power in multiple fronto-parietal networks
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Frontal top-down signals increase coupling of auditory low-frequency oscillations to continuous speech in human listeners
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Irregular speech rate dissociates auditory cortical entrainment, evoked responses, and frontal alpha
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Abstract:
The entrainment of slow rhythmic auditory cortical activity to the temporal regularities in speech is considered to be a central mechanism underlying auditory perception. Previous work has shown that entrainment is reduced when the quality of the acoustic input is degraded, but has also linked rhythmic activity at similar time scales to the encoding of temporal expectations. To understand these bottom-up and top-down contributions to rhythmic entrainment, we manipulated the temporal predictive structure of speech by parametrically altering the distribution of pauses between syllables or words, thereby rendering the local speech rate irregular while preserving intelligibility and the envelope fluctuations of the acoustic signal. Recording EEG activity in human participants, we found that this manipulation did not alter neural processes reflecting the encoding of individual sound transients, such as evoked potentials. However, the manipulation significantly reduced the fidelity of auditory delta (but not theta) band entrainment to the speech envelope. It also reduced left frontal alpha power and this alpha reduction was predictive of the reduced delta entrainment across participants. Our results show that rhythmic auditory entrainment in delta and theta bands reflect functionally distinct processes. Furthermore, they reveal that delta entrainment is under top-down control and likely reflects prefrontal processes that are sensitive to acoustical regularities rather than the bottom-up encoding of acoustic features.
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URL: http://eprints.gla.ac.uk/109343/ http://eprints.gla.ac.uk/109343/7/109343.pdf
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Frontal Top-Down Signals Increase Coupling of Auditory Low-Frequency Oscillations to Continuous Speech in Human Listeners
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Irregular Speech Rate Dissociates Auditory Cortical Entrainment, Evoked Responses, and Frontal Alpha
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