Additive and interactive effects of spatial attention and expectation on perceptual decisions

Abstract Spatial attention and expectation are two critical top-down mechanisms controlling perceptual inference. Based on previous research it remains unclear whether their influence on perceptual decisions is additive or interactive. We developed a novel multisensory approach that orthogonally man...

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Autores principales:	Arianna Zuanazzi, Uta Noppeney
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/813b203521df46028a4e651a6dc582c0
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spelling	oai:doaj.org-article:813b203521df46028a4e651a6dc582c02021-12-02T15:08:44ZAdditive and interactive effects of spatial attention and expectation on perceptual decisions10.1038/s41598-018-24703-62045-2322https://doaj.org/article/813b203521df46028a4e651a6dc582c02018-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-24703-6https://doaj.org/toc/2045-2322Abstract Spatial attention and expectation are two critical top-down mechanisms controlling perceptual inference. Based on previous research it remains unclear whether their influence on perceptual decisions is additive or interactive. We developed a novel multisensory approach that orthogonally manipulated spatial attention (i.e. task-relevance) and expectation (i.e. signal probability) selectively in audition and evaluated their effects on observers’ responses in vision. Critically, while experiment 1 manipulated expectation directly via the probability of task-relevant auditory targets across hemifields, experiment 2 manipulated it indirectly via task-irrelevant auditory non-targets. Surprisingly, our results demonstrate that spatial attention and signal probability influence perceptual decisions either additively or interactively. These seemingly contradictory results can be explained parsimoniously by a model that combines spatial attention, general and spatially selective response probabilities as predictors with no direct influence of signal probability. Our model provides a novel perspective on how spatial attention and expectation facilitate effective interactions with the environment.Arianna ZuanazziUta NoppeneyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Arianna Zuanazzi Uta Noppeney Additive and interactive effects of spatial attention and expectation on perceptual decisions
description	Abstract Spatial attention and expectation are two critical top-down mechanisms controlling perceptual inference. Based on previous research it remains unclear whether their influence on perceptual decisions is additive or interactive. We developed a novel multisensory approach that orthogonally manipulated spatial attention (i.e. task-relevance) and expectation (i.e. signal probability) selectively in audition and evaluated their effects on observers’ responses in vision. Critically, while experiment 1 manipulated expectation directly via the probability of task-relevant auditory targets across hemifields, experiment 2 manipulated it indirectly via task-irrelevant auditory non-targets. Surprisingly, our results demonstrate that spatial attention and signal probability influence perceptual decisions either additively or interactively. These seemingly contradictory results can be explained parsimoniously by a model that combines spatial attention, general and spatially selective response probabilities as predictors with no direct influence of signal probability. Our model provides a novel perspective on how spatial attention and expectation facilitate effective interactions with the environment.
format	article
author	Arianna Zuanazzi Uta Noppeney
author_facet	Arianna Zuanazzi Uta Noppeney
author_sort	Arianna Zuanazzi
title	Additive and interactive effects of spatial attention and expectation on perceptual decisions
title_short	Additive and interactive effects of spatial attention and expectation on perceptual decisions
title_full	Additive and interactive effects of spatial attention and expectation on perceptual decisions
title_fullStr	Additive and interactive effects of spatial attention and expectation on perceptual decisions
title_full_unstemmed	Additive and interactive effects of spatial attention and expectation on perceptual decisions
title_sort	additive and interactive effects of spatial attention and expectation on perceptual decisions
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/813b203521df46028a4e651a6dc582c0
work_keys_str_mv	AT ariannazuanazzi additiveandinteractiveeffectsofspatialattentionandexpectationonperceptualdecisions AT utanoppeney additiveandinteractiveeffectsofspatialattentionandexpectationonperceptualdecisions
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Additive and interactive effects of spatial attention and expectation on perceptual decisions

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