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Motion-induced distortion of shape
Motion, position, and form are intricately intertwined in perception. Motion distorts visual space, resulting in illusory position shifts such as flash-drag and flash-grab effects. The flash-grab displaces a test by up to several times its size. This lets us use it to investigate where the motion-in...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10617635/ https://www.ncbi.nlm.nih.gov/pubmed/37902761 http://dx.doi.org/10.1167/jov.23.12.10 |
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author | Adamian, Nika Anstis, Stuart Cavanagh, Patrick |
author_facet | Adamian, Nika Anstis, Stuart Cavanagh, Patrick |
author_sort | Adamian, Nika |
collection | PubMed |
description | Motion, position, and form are intricately intertwined in perception. Motion distorts visual space, resulting in illusory position shifts such as flash-drag and flash-grab effects. The flash-grab displaces a test by up to several times its size. This lets us use it to investigate where the motion-induced shift operates in the processing stream from photoreceptor activation to feature activation to object recognition. We present several canonical, highly familiar forms and ask whether the motion-induced shift operates uniformly across the form. If it did, we could conclude that the effect occurred after the elements of the form are bound. However, we find that motion-induced distortion affects not only the position, but also the appearance of briefly presented, canonical shapes (square, circle, and letter T). Features of the flashed target that were closest to its center were shifted in the direction of motion more than those further from its center. Outline shapes were affected more than filled shapes, and the strength of the distortion increased with the contrast of the moving background. This not only supports a nonuniform spatial profile for the motion-induced shift but also indicates that the shift operates before the shape is established, even for highly familiar shapes like squares, circles, and letters. |
format | Online Article Text |
id | pubmed-10617635 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-106176352023-11-01 Motion-induced distortion of shape Adamian, Nika Anstis, Stuart Cavanagh, Patrick J Vis Article Motion, position, and form are intricately intertwined in perception. Motion distorts visual space, resulting in illusory position shifts such as flash-drag and flash-grab effects. The flash-grab displaces a test by up to several times its size. This lets us use it to investigate where the motion-induced shift operates in the processing stream from photoreceptor activation to feature activation to object recognition. We present several canonical, highly familiar forms and ask whether the motion-induced shift operates uniformly across the form. If it did, we could conclude that the effect occurred after the elements of the form are bound. However, we find that motion-induced distortion affects not only the position, but also the appearance of briefly presented, canonical shapes (square, circle, and letter T). Features of the flashed target that were closest to its center were shifted in the direction of motion more than those further from its center. Outline shapes were affected more than filled shapes, and the strength of the distortion increased with the contrast of the moving background. This not only supports a nonuniform spatial profile for the motion-induced shift but also indicates that the shift operates before the shape is established, even for highly familiar shapes like squares, circles, and letters. The Association for Research in Vision and Ophthalmology 2023-10-30 /pmc/articles/PMC10617635/ /pubmed/37902761 http://dx.doi.org/10.1167/jov.23.12.10 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 Adamian, Nika Anstis, Stuart Cavanagh, Patrick Motion-induced distortion of shape |
title | Motion-induced distortion of shape |
title_full | Motion-induced distortion of shape |
title_fullStr | Motion-induced distortion of shape |
title_full_unstemmed | Motion-induced distortion of shape |
title_short | Motion-induced distortion of shape |
title_sort | motion-induced distortion of shape |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10617635/ https://www.ncbi.nlm.nih.gov/pubmed/37902761 http://dx.doi.org/10.1167/jov.23.12.10 |
work_keys_str_mv | AT adamiannika motioninduceddistortionofshape AT anstisstuart motioninduceddistortionofshape AT cavanaghpatrick motioninduceddistortionofshape |