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Pupil response hazard rates predict perceived gaze durations
We investigated the mechanisms for evaluating perceived gaze-shift duration. Timing relies on the accumulation of endogenous physiological signals. Here we focused on arousal, measured through pupil dilation, as a candidate timing signal. Participants timed gaze-shifts performed by face stimuli in a...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5479779/ https://www.ncbi.nlm.nih.gov/pubmed/28638055 http://dx.doi.org/10.1038/s41598-017-04249-9 |
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author | Binetti, Nicola Harrison, Charlotte Mareschal, Isabelle Johnston, Alan |
author_facet | Binetti, Nicola Harrison, Charlotte Mareschal, Isabelle Johnston, Alan |
author_sort | Binetti, Nicola |
collection | PubMed |
description | We investigated the mechanisms for evaluating perceived gaze-shift duration. Timing relies on the accumulation of endogenous physiological signals. Here we focused on arousal, measured through pupil dilation, as a candidate timing signal. Participants timed gaze-shifts performed by face stimuli in a Standard/Probe comparison task. Pupil responses were binned according to “Longer/Shorter” judgements in trials where Standard and Probe were identical. This ensured that pupil responses reflected endogenous arousal fluctuations opposed to differences in stimulus content. We found that pupil hazard rates predicted the classification of sub-second intervals (steeper dilation = “Longer” classifications). This shows that the accumulation of endogenous arousal signals informs gaze-shift timing judgements. We also found that participants relied exclusively on the 2(nd) stimulus to perform the classification, providing insights into timing strategies under conditions of maximum uncertainty. We observed no dissociation in pupil responses when timing equivalent neutral spatial displacements, indicating that a stimulus-dependent timer exploits arousal to time gaze-shifts. |
format | Online Article Text |
id | pubmed-5479779 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54797792017-06-23 Pupil response hazard rates predict perceived gaze durations Binetti, Nicola Harrison, Charlotte Mareschal, Isabelle Johnston, Alan Sci Rep Article We investigated the mechanisms for evaluating perceived gaze-shift duration. Timing relies on the accumulation of endogenous physiological signals. Here we focused on arousal, measured through pupil dilation, as a candidate timing signal. Participants timed gaze-shifts performed by face stimuli in a Standard/Probe comparison task. Pupil responses were binned according to “Longer/Shorter” judgements in trials where Standard and Probe were identical. This ensured that pupil responses reflected endogenous arousal fluctuations opposed to differences in stimulus content. We found that pupil hazard rates predicted the classification of sub-second intervals (steeper dilation = “Longer” classifications). This shows that the accumulation of endogenous arousal signals informs gaze-shift timing judgements. We also found that participants relied exclusively on the 2(nd) stimulus to perform the classification, providing insights into timing strategies under conditions of maximum uncertainty. We observed no dissociation in pupil responses when timing equivalent neutral spatial displacements, indicating that a stimulus-dependent timer exploits arousal to time gaze-shifts. Nature Publishing Group UK 2017-06-21 /pmc/articles/PMC5479779/ /pubmed/28638055 http://dx.doi.org/10.1038/s41598-017-04249-9 Text en © The Author(s) 2017 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 Binetti, Nicola Harrison, Charlotte Mareschal, Isabelle Johnston, Alan Pupil response hazard rates predict perceived gaze durations |
title | Pupil response hazard rates predict perceived gaze durations |
title_full | Pupil response hazard rates predict perceived gaze durations |
title_fullStr | Pupil response hazard rates predict perceived gaze durations |
title_full_unstemmed | Pupil response hazard rates predict perceived gaze durations |
title_short | Pupil response hazard rates predict perceived gaze durations |
title_sort | pupil response hazard rates predict perceived gaze durations |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5479779/ https://www.ncbi.nlm.nih.gov/pubmed/28638055 http://dx.doi.org/10.1038/s41598-017-04249-9 |
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