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Tracking and perceiving diverse motion signals: Directional biases in human smooth pursuit and perception
Human smooth pursuit eye movements and motion perception behave similarly when observers track and judge the motion of simple objects, such as dots. But moving objects in our natural environment are complex and contain internal motion. We ask how pursuit and perception integrate the motion of object...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9522262/ https://www.ncbi.nlm.nih.gov/pubmed/36174036 http://dx.doi.org/10.1371/journal.pone.0275324 |
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author | Wu, Xiuyun Spering, Miriam |
author_facet | Wu, Xiuyun Spering, Miriam |
author_sort | Wu, Xiuyun |
collection | PubMed |
description | Human smooth pursuit eye movements and motion perception behave similarly when observers track and judge the motion of simple objects, such as dots. But moving objects in our natural environment are complex and contain internal motion. We ask how pursuit and perception integrate the motion of objects with motion that is internal to the object. Observers (n = 20) tracked a moving random-dot kinematogram with their eyes and reported the object’s perceived direction. Objects moved horizontally with vertical shifts of 0, ±3, ±6, or ±9° and contained internal dots that were static or moved ±90° up/down. Results show that whereas pursuit direction was consistently biased in the direction of the internal dot motion, perceptual biases differed between observers. Interestingly, the perceptual bias was related to the magnitude of the pursuit bias (r = 0.75): perceptual and pursuit biases were directionally aligned in observers that showed a large pursuit bias, but went in opposite directions in observers with a smaller pursuit bias. Dissociations between perception and pursuit might reflect different functional demands of the two systems. Pursuit integrates all available motion signals in order to maximize the ability to monitor and collect information from the whole scene. Perception needs to recognize and classify visual information, thus segregating the target from its context. Ambiguity in whether internal motion is part of the scene or contributes to object motion might have resulted in individual differences in perception. The perception-pursuit correlation suggests shared early-stage motion processing or perception-pursuit interactions. |
format | Online Article Text |
id | pubmed-9522262 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-95222622022-09-30 Tracking and perceiving diverse motion signals: Directional biases in human smooth pursuit and perception Wu, Xiuyun Spering, Miriam PLoS One Research Article Human smooth pursuit eye movements and motion perception behave similarly when observers track and judge the motion of simple objects, such as dots. But moving objects in our natural environment are complex and contain internal motion. We ask how pursuit and perception integrate the motion of objects with motion that is internal to the object. Observers (n = 20) tracked a moving random-dot kinematogram with their eyes and reported the object’s perceived direction. Objects moved horizontally with vertical shifts of 0, ±3, ±6, or ±9° and contained internal dots that were static or moved ±90° up/down. Results show that whereas pursuit direction was consistently biased in the direction of the internal dot motion, perceptual biases differed between observers. Interestingly, the perceptual bias was related to the magnitude of the pursuit bias (r = 0.75): perceptual and pursuit biases were directionally aligned in observers that showed a large pursuit bias, but went in opposite directions in observers with a smaller pursuit bias. Dissociations between perception and pursuit might reflect different functional demands of the two systems. Pursuit integrates all available motion signals in order to maximize the ability to monitor and collect information from the whole scene. Perception needs to recognize and classify visual information, thus segregating the target from its context. Ambiguity in whether internal motion is part of the scene or contributes to object motion might have resulted in individual differences in perception. The perception-pursuit correlation suggests shared early-stage motion processing or perception-pursuit interactions. Public Library of Science 2022-09-29 /pmc/articles/PMC9522262/ /pubmed/36174036 http://dx.doi.org/10.1371/journal.pone.0275324 Text en © 2022 Wu, Spering https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Wu, Xiuyun Spering, Miriam Tracking and perceiving diverse motion signals: Directional biases in human smooth pursuit and perception |
title | Tracking and perceiving diverse motion signals: Directional biases in human smooth pursuit and perception |
title_full | Tracking and perceiving diverse motion signals: Directional biases in human smooth pursuit and perception |
title_fullStr | Tracking and perceiving diverse motion signals: Directional biases in human smooth pursuit and perception |
title_full_unstemmed | Tracking and perceiving diverse motion signals: Directional biases in human smooth pursuit and perception |
title_short | Tracking and perceiving diverse motion signals: Directional biases in human smooth pursuit and perception |
title_sort | tracking and perceiving diverse motion signals: directional biases in human smooth pursuit and perception |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9522262/ https://www.ncbi.nlm.nih.gov/pubmed/36174036 http://dx.doi.org/10.1371/journal.pone.0275324 |
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