Effect of attentional load on audiovisual speech perception: evidence from ERPs
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- dc.contributor.author Alsius, Agnèsca
- dc.contributor.author Möttönen, Riikkaca
- dc.contributor.author Sams, Mikko E.ca
- dc.contributor.author Soto-Faraco, Salvador, 1970-ca
- dc.contributor.author Tiippana, Kaisaca
- dc.date.accessioned 2015-05-29T07:02:07Z
- dc.date.available 2015-05-29T07:02:07Z
- dc.date.issued 2014ca
- dc.description.abstract Seeing articulatory movements influences perception of auditory speech. This is often reflected in a shortened latency of auditory event-related potentials (ERPs) generated in the auditory cortex. The present study addressed whether this early neural correlate of audiovisual interaction is modulated by attention. We recorded ERPs in 15 subjects while they were presented with auditory, visual, and audiovisual spoken syllables. Audiovisual stimuli consisted of incongruent auditory and visual components known to elicit a McGurk effect, i.e., a visually driven alteration in the auditory speech percept. In a Dual task condition, participants were asked to identify spoken syllables whilst monitoring a rapid visual stream of pictures for targets, i.e., they had to divide their attention. In a Single task condition, participants identified the syllables without any other tasks, i.e., they were asked to ignore the pictures and focus their attention fully on the spoken syllables. The McGurk effect was weaker in the Dual task than in the Single task condition, indicating an effect of attentional load on audiovisual speech perception. Early auditory ERP components, N1 and P2, peaked earlier to audiovisual stimuli than to auditory stimuli when attention was fully focused on syllables, indicating neurophysiological audiovisual interaction. This latency decrement was reduced when attention was loaded, suggesting that attention influences early neural processing of audiovisual speech. We conclude that reduced attention weakens the interaction between vision and audition in speech.en
- dc.description.sponsorship This research was supported by grants from Spanish Ministry of Science and Innovation (PSI2010-15426) and the European Research Council (StG-2010 263145) to Salvador Soto-Faraco and Agnès Alsius.
- dc.format.mimetype application/pdfca
- dc.identifier.citation Alsius A, Möttönen R, Sams ME, Soto-Faraco S, Tiippana K. Effect of attentional load on audiovisual speech perception: evidence from ERPs. Front Psychol. 2014;5:727. DOI: 10.3389/fpsyg.2014.00727ca
- dc.identifier.doi http://dx.doi.org/10.3389/fpsyg.2014.00727
- dc.identifier.issn 1664-1078ca
- dc.identifier.uri http://hdl.handle.net/10230/23685
- dc.language.iso engca
- dc.publisher Frontiersca
- dc.relation.ispartof Frontiers in Psychology 2014;5:727.
- dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/263145ca
- dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/PSI2010-15426
- dc.rights © 2014 Alsius, Möttönen, Sams, Soto-Faraco and Tiippana. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.ca
- dc.rights.accessRights info:eu-repo/semantics/openAccessca
- dc.rights.uri http://creativecommons.org/licenses/by/3.0/
- dc.subject.keyword Audiovisual speech perception
- dc.subject.keyword Multisensory integration
- dc.subject.keyword McGurk effect
- dc.subject.keyword Attention
- dc.subject.keyword Event-related potentials
- dc.title Effect of attentional load on audiovisual speech perception: evidence from ERPsca
- dc.type info:eu-repo/semantics/articleca
- dc.type.version info:eu-repo/semantics/publishedVersionca