Cargando…
Bird expertise does not increase motion sensitivity to bird flight motion
While motion information is important for the early stages of vision, it also contributes to later stages of object recognition. For example, human observers can detect the presence of a human, judge its actions, and judge its gender and identity simply based on motion cues conveyed in a point-light...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8107655/ https://www.ncbi.nlm.nih.gov/pubmed/33951142 http://dx.doi.org/10.1167/jov.21.5.5 |
_version_ | 1783689988086431744 |
---|---|
author | Hagen, Simen Vuong, Quoc C. Chin, Michael D. Scott, Lisa S. Curran, Tim Tanaka, James W. |
author_facet | Hagen, Simen Vuong, Quoc C. Chin, Michael D. Scott, Lisa S. Curran, Tim Tanaka, James W. |
author_sort | Hagen, Simen |
collection | PubMed |
description | While motion information is important for the early stages of vision, it also contributes to later stages of object recognition. For example, human observers can detect the presence of a human, judge its actions, and judge its gender and identity simply based on motion cues conveyed in a point-light display. Here we examined whether object expertise enhances the observer's sensitivity to its characteristic movement. Bird experts and novices were shown point-light displays of upright and inverted birds in flight, or upright and inverted human walkers, and asked to discriminate them from spatially scrambled point-light displays of the same stimuli. While the spatially scrambled stimuli retained the local motion of each dot of the moving objects, it disrupted the global percept of the object in motion. To estimate a detection threshold in each object domain, we systematically varied the number of noise dots in which the stimuli were embedded using an adaptive staircase approach. Contrary to our predictions, the experts did not show disproportionately higher sensitivity to bird motion, and both groups showed no inversion cost. However, consistent with previous work showing a robust inversion effect for human motion, both groups were more sensitive to upright human walkers than their inverted counterparts. Thus, the result suggests that real-world experience in the bird domain has little to no influence on the sensitivity to bird motion and that birds do not show the typical inversion effect seen with humans and other terrestrial movement. |
format | Online Article Text |
id | pubmed-8107655 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-81076552021-05-17 Bird expertise does not increase motion sensitivity to bird flight motion Hagen, Simen Vuong, Quoc C. Chin, Michael D. Scott, Lisa S. Curran, Tim Tanaka, James W. J Vis Article While motion information is important for the early stages of vision, it also contributes to later stages of object recognition. For example, human observers can detect the presence of a human, judge its actions, and judge its gender and identity simply based on motion cues conveyed in a point-light display. Here we examined whether object expertise enhances the observer's sensitivity to its characteristic movement. Bird experts and novices were shown point-light displays of upright and inverted birds in flight, or upright and inverted human walkers, and asked to discriminate them from spatially scrambled point-light displays of the same stimuli. While the spatially scrambled stimuli retained the local motion of each dot of the moving objects, it disrupted the global percept of the object in motion. To estimate a detection threshold in each object domain, we systematically varied the number of noise dots in which the stimuli were embedded using an adaptive staircase approach. Contrary to our predictions, the experts did not show disproportionately higher sensitivity to bird motion, and both groups showed no inversion cost. However, consistent with previous work showing a robust inversion effect for human motion, both groups were more sensitive to upright human walkers than their inverted counterparts. Thus, the result suggests that real-world experience in the bird domain has little to no influence on the sensitivity to bird motion and that birds do not show the typical inversion effect seen with humans and other terrestrial movement. The Association for Research in Vision and Ophthalmology 2021-05-05 /pmc/articles/PMC8107655/ /pubmed/33951142 http://dx.doi.org/10.1167/jov.21.5.5 Text en Copyright 2021 The Authors https://creativecommons.org/licenses/by/4.0/This work is licensed under a Creative Commons Attribution 4.0 International License. |
spellingShingle | Article Hagen, Simen Vuong, Quoc C. Chin, Michael D. Scott, Lisa S. Curran, Tim Tanaka, James W. Bird expertise does not increase motion sensitivity to bird flight motion |
title | Bird expertise does not increase motion sensitivity to bird flight motion |
title_full | Bird expertise does not increase motion sensitivity to bird flight motion |
title_fullStr | Bird expertise does not increase motion sensitivity to bird flight motion |
title_full_unstemmed | Bird expertise does not increase motion sensitivity to bird flight motion |
title_short | Bird expertise does not increase motion sensitivity to bird flight motion |
title_sort | bird expertise does not increase motion sensitivity to bird flight motion |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8107655/ https://www.ncbi.nlm.nih.gov/pubmed/33951142 http://dx.doi.org/10.1167/jov.21.5.5 |
work_keys_str_mv | AT hagensimen birdexpertisedoesnotincreasemotionsensitivitytobirdflightmotion AT vuongquocc birdexpertisedoesnotincreasemotionsensitivitytobirdflightmotion AT chinmichaeld birdexpertisedoesnotincreasemotionsensitivitytobirdflightmotion AT scottlisas birdexpertisedoesnotincreasemotionsensitivitytobirdflightmotion AT currantim birdexpertisedoesnotincreasemotionsensitivitytobirdflightmotion AT tanakajamesw birdexpertisedoesnotincreasemotionsensitivitytobirdflightmotion |