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Temporal stability of human heading perception

Humans are capable of accurately judging their heading from optic flow during straight forward self-motion. Despite the global coherence in the optic flow field, however, visual clutter and other naturalistic conditions create constant flux on the eye. This presents a problem that must be overcome t...

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Detalles Bibliográficos
Autores principales: Ali, Mufaddal, Decker, Eli, Layton, Oliver W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Association for Research in Vision and Ophthalmology 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9932552/
https://www.ncbi.nlm.nih.gov/pubmed/36786748
http://dx.doi.org/10.1167/jov.23.2.8
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author Ali, Mufaddal
Decker, Eli
Layton, Oliver W.
author_facet Ali, Mufaddal
Decker, Eli
Layton, Oliver W.
author_sort Ali, Mufaddal
collection PubMed
description Humans are capable of accurately judging their heading from optic flow during straight forward self-motion. Despite the global coherence in the optic flow field, however, visual clutter and other naturalistic conditions create constant flux on the eye. This presents a problem that must be overcome to accurately perceive heading from optic flow—the visual system must maintain sensitivity to optic flow variations that correspond with actual changes in self-motion and disregard those that do not. One solution could involve integrating optic flow over time to stabilize heading signals while suppressing transient fluctuations. Stability, however, may come at the cost of sluggishness. Here, we investigate the stability of human heading perception when subjects judge their heading after the simulated direction of self-motion changes. We found that the initial heading exerted an attractive influence on judgments of the final heading. Consistent with an evolving heading representation, bias toward the initial heading increased with the size of the heading change and as the viewing duration of the optic flow consistent with the final heading decreased. Introducing periods of sensory dropout (blackouts) later in the trial increased bias whereas an earlier one did not. Simulations of a neural model, the Competitive Dynamics Model, demonstrates that a mechanism that produces an evolving heading signal through recurrent competitive interactions largely captures the human data. Our findings characterize how the visual system balances stability in heading perception with sensitivity to change and support the hypothesis that heading perception evolves over time.
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spelling pubmed-99325522023-02-17 Temporal stability of human heading perception Ali, Mufaddal Decker, Eli Layton, Oliver W. J Vis Article Humans are capable of accurately judging their heading from optic flow during straight forward self-motion. Despite the global coherence in the optic flow field, however, visual clutter and other naturalistic conditions create constant flux on the eye. This presents a problem that must be overcome to accurately perceive heading from optic flow—the visual system must maintain sensitivity to optic flow variations that correspond with actual changes in self-motion and disregard those that do not. One solution could involve integrating optic flow over time to stabilize heading signals while suppressing transient fluctuations. Stability, however, may come at the cost of sluggishness. Here, we investigate the stability of human heading perception when subjects judge their heading after the simulated direction of self-motion changes. We found that the initial heading exerted an attractive influence on judgments of the final heading. Consistent with an evolving heading representation, bias toward the initial heading increased with the size of the heading change and as the viewing duration of the optic flow consistent with the final heading decreased. Introducing periods of sensory dropout (blackouts) later in the trial increased bias whereas an earlier one did not. Simulations of a neural model, the Competitive Dynamics Model, demonstrates that a mechanism that produces an evolving heading signal through recurrent competitive interactions largely captures the human data. Our findings characterize how the visual system balances stability in heading perception with sensitivity to change and support the hypothesis that heading perception evolves over time. The Association for Research in Vision and Ophthalmology 2023-02-14 /pmc/articles/PMC9932552/ /pubmed/36786748 http://dx.doi.org/10.1167/jov.23.2.8 Text en Copyright 2023 The Authors https://creativecommons.org/licenses/by/4.0/This work is licensed under a Creative Commons Attribution 4.0 International License.
spellingShingle Article
Ali, Mufaddal
Decker, Eli
Layton, Oliver W.
Temporal stability of human heading perception
title Temporal stability of human heading perception
title_full Temporal stability of human heading perception
title_fullStr Temporal stability of human heading perception
title_full_unstemmed Temporal stability of human heading perception
title_short Temporal stability of human heading perception
title_sort temporal stability of human heading perception
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9932552/
https://www.ncbi.nlm.nih.gov/pubmed/36786748
http://dx.doi.org/10.1167/jov.23.2.8
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