High cognitive load enhances the susceptibility to non-speech audiovisual illusions

Abstract The role of attentional processes in the integration of input from different sensory modalities is complex and multifaceted. Importantly, little is known about how simple, non-linguistic stimuli are integrated when the resources available for sensory processing are exhausted. We studied thi...

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Autores principales:	Georgios Michail, Julian Keil
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3bb865e1ee424ee7a7683c561bda25f2
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spelling	oai:doaj.org-article:3bb865e1ee424ee7a7683c561bda25f22021-12-02T15:08:04ZHigh cognitive load enhances the susceptibility to non-speech audiovisual illusions10.1038/s41598-018-30007-62045-2322https://doaj.org/article/3bb865e1ee424ee7a7683c561bda25f22018-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-30007-6https://doaj.org/toc/2045-2322Abstract The role of attentional processes in the integration of input from different sensory modalities is complex and multifaceted. Importantly, little is known about how simple, non-linguistic stimuli are integrated when the resources available for sensory processing are exhausted. We studied this question by examining multisensory integration under conditions of limited endogenous attentional resources. Multisensory integration was assessed through the sound-induced flash illusion (SIFI), in which a flash presented simultaneously with two short auditory beeps is often perceived as two flashes, while cognitive load was manipulated using an n-back task. A one-way repeated measures ANOVA revealed that increased cognitive demands had a significant effect on the perception of the illusion while post-hoc tests showed that participants’ illusion perception was increased when attentional resources were limited. Additional analysis demonstrated that this effect was not related to a response bias. These findings provide evidence that the integration of non-speech, audiovisual stimuli is enhanced under reduced attentional resources and it therefore supports the notion that top-down attentional control plays an essential role in multisensory integration.Georgios MichailJulian KeilNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Georgios Michail Julian Keil High cognitive load enhances the susceptibility to non-speech audiovisual illusions
description	Abstract The role of attentional processes in the integration of input from different sensory modalities is complex and multifaceted. Importantly, little is known about how simple, non-linguistic stimuli are integrated when the resources available for sensory processing are exhausted. We studied this question by examining multisensory integration under conditions of limited endogenous attentional resources. Multisensory integration was assessed through the sound-induced flash illusion (SIFI), in which a flash presented simultaneously with two short auditory beeps is often perceived as two flashes, while cognitive load was manipulated using an n-back task. A one-way repeated measures ANOVA revealed that increased cognitive demands had a significant effect on the perception of the illusion while post-hoc tests showed that participants’ illusion perception was increased when attentional resources were limited. Additional analysis demonstrated that this effect was not related to a response bias. These findings provide evidence that the integration of non-speech, audiovisual stimuli is enhanced under reduced attentional resources and it therefore supports the notion that top-down attentional control plays an essential role in multisensory integration.
format	article
author	Georgios Michail Julian Keil
author_facet	Georgios Michail Julian Keil
author_sort	Georgios Michail
title	High cognitive load enhances the susceptibility to non-speech audiovisual illusions
title_short	High cognitive load enhances the susceptibility to non-speech audiovisual illusions
title_full	High cognitive load enhances the susceptibility to non-speech audiovisual illusions
title_fullStr	High cognitive load enhances the susceptibility to non-speech audiovisual illusions
title_full_unstemmed	High cognitive load enhances the susceptibility to non-speech audiovisual illusions
title_sort	high cognitive load enhances the susceptibility to non-speech audiovisual illusions
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/3bb865e1ee424ee7a7683c561bda25f2
work_keys_str_mv	AT georgiosmichail highcognitiveloadenhancesthesusceptibilitytononspeechaudiovisualillusions AT juliankeil highcognitiveloadenhancesthesusceptibilitytononspeechaudiovisualillusions
_version_	1718388246017212416

High cognitive load enhances the susceptibility to non-speech audiovisual illusions

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