Attentional modulation of hierarchical speech representations in a multitalker environment

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buir.contributor.authorKiremitçi, İbrahim
buir.contributor.authorYılmaz, Özgür
buir.contributor.authorÇelik, Emin
buir.contributor.authorShahdloo, Mohammad
buir.contributor.authorÇukur, Tolga
buir.contributor.orcidKiremitçi, İbrahim|0000-0002-1730-2844
buir.contributor.orcidÇelik, Emin|0000-0002-5229-7454
buir.contributor.orcidShahdloo, Mohammad|0000-0003-1935-3845
buir.contributor.orcidÇukur, Tolga|0000-0002-2296-851X
dc.citation.epage5005en_US
dc.citation.issueNumber11en_US
dc.citation.spage4986en_US
dc.citation.volumeNumber31en_US
dc.contributor.authorKiremitçi, İbrahim
dc.contributor.authorYılmaz, Özgür
dc.contributor.authorÇelik, Emin
dc.contributor.authorShahdloo, Mohammad
dc.contributor.authorHuth, A. G.
dc.contributor.authorÇukur, Tolga
dc.date.accessioned2022-02-10T14:14:36Z
dc.date.available2022-02-10T14:14:36Z
dc.date.issued2021-11
dc.departmentAysel Sabuncu Brain Research Center (BAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentNational Magnetic Resonance Research Center (UMRAM)en_US
dc.description.abstractHumans are remarkably adept in listening to a desired speaker in a crowded environment, while filtering out nontarget speakers in the background. Attention is key to solving this difficult cocktail-party task, yet a detailed characterization of attentional effects on speech representations is lacking. It remains unclear across what levels of speech features and how much attentional modulation occurs in each brain area during the cocktail-party task. To address these questions, we recorded whole-brain blood-oxygen-level-dependent (BOLD) responses while subjects either passively listened to single-speaker stories, or selectively attended to a male or a female speaker in temporally overlaid stories in separate experiments. Spectral, articulatory, and semantic models of the natural stories were constructed. Intrinsic selectivity profiles were identified via voxelwise models fit to passive listening responses. Attentional modulations were then quantified based on model predictions for attended and unattended stories in the cocktail-party task. We find that attention causes broad modulations at multiple levels of speech representations while growing stronger toward later stages of processing, and that unattended speech is represented up to the semantic level in parabelt auditory cortex. These results provide insights on attentional mechanisms that underlie the ability to selectively listen to a desired speaker in noisy multispeaker environments.en_US
dc.description.provenanceSubmitted by Burcu Böke (tburcu@bilkent.edu.tr) on 2022-02-10T14:14:36Z No. of bitstreams: 1 Attentional_modulation_of_hierarchical_speech_representations_in_a_multitalker_environment.pdf: 2208685 bytes, checksum: a4d7412010f7a60a79ca8a11d734fc03 (MD5)en
dc.description.provenanceMade available in DSpace on 2022-02-10T14:14:36Z (GMT). No. of bitstreams: 1 Attentional_modulation_of_hierarchical_speech_representations_in_a_multitalker_environment.pdf: 2208685 bytes, checksum: a4d7412010f7a60a79ca8a11d734fc03 (MD5) Previous issue date: 2021-11en
dc.identifier.doi10.1093/cercor/bhab136en_US
dc.identifier.eissn1460-2199
dc.identifier.issn1047-3211
dc.identifier.urihttp://hdl.handle.net/11693/77256
dc.language.isoEnglishen_US
dc.publisherOxford University Pressen_US
dc.relation.isversionofhttps://doi.org/10.1093/cercor/bhab136en_US
dc.source.titleCerebral Cortexen_US
dc.subjectCocktail-partyen_US
dc.subjectDorsal and ventral streamen_US
dc.subjectEncoding modelen_US
dc.subjectFMRIen_US
dc.subjectNatural speechen_US
dc.titleAttentional modulation of hierarchical speech representations in a multitalker environmenten_US
dc.typeArticleen_US

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