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Additive and interactive effects of spatial attention and expectation on perceptual decisions
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...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5928039/ https://www.ncbi.nlm.nih.gov/pubmed/29712941 http://dx.doi.org/10.1038/s41598-018-24703-6 |
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author | Zuanazzi, Arianna Noppeney, Uta |
author_facet | Zuanazzi, Arianna Noppeney, Uta |
author_sort | Zuanazzi, Arianna |
collection | PubMed |
description | 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 | Online Article Text |
id | pubmed-5928039 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-59280392018-05-07 Additive and interactive effects of spatial attention and expectation on perceptual decisions Zuanazzi, Arianna Noppeney, Uta Sci Rep Article 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. Nature Publishing Group UK 2018-04-30 /pmc/articles/PMC5928039/ /pubmed/29712941 http://dx.doi.org/10.1038/s41598-018-24703-6 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Zuanazzi, Arianna Noppeney, Uta Additive and interactive effects of spatial attention and expectation on perceptual decisions |
title | 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_short | 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 |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5928039/ https://www.ncbi.nlm.nih.gov/pubmed/29712941 http://dx.doi.org/10.1038/s41598-018-24703-6 |
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