Investigating the status of biological stimuli as objects of attention in multiple object tracking.

<h4>Background</h4>Humans are able to track multiple simultaneously moving objects. A number of factors have been identified that can influence the ease with which objects can be attended and tracked. Here, we explored the possibility that object tracking abilities may be specialized for...

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Autores principales:	Lee H de-Wit, Carmen E Lefevre, Robert W Kentridge, Geraint Rees, Ayse P Saygin
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ece2a7ec2c2d43e390a5838377c9c561
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id	oai:doaj.org-article:ece2a7ec2c2d43e390a5838377c9c561
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spelling	oai:doaj.org-article:ece2a7ec2c2d43e390a5838377c9c5612021-11-18T06:56:24ZInvestigating the status of biological stimuli as objects of attention in multiple object tracking.1932-620310.1371/journal.pone.0016232https://doaj.org/article/ece2a7ec2c2d43e390a5838377c9c5612011-03-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21483844/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Humans are able to track multiple simultaneously moving objects. A number of factors have been identified that can influence the ease with which objects can be attended and tracked. Here, we explored the possibility that object tracking abilities may be specialized for tracking biological targets such as people.<h4>Methodology/principal findings</h4>We used the Multiple Object Tracking (MOT) paradigm to explore whether the high-level biological status of the targets affects the efficiency of attentional selection and tracking. In Experiment 1, we assessed the tracking of point-light biological motion figures. As controls, we used either the same stimuli or point-light letters, presented in upright, inverted or scrambled configurations. While scrambling significantly affected performance for both letters and point-light figures, there was an effect of inversion restricted to biological motion, inverted figures being harder to track. In Experiment 2, we found that tracking performance was equivalent for natural point-light walkers and 'moon-walkers', whose implied direction was incongruent with their actual direction of motion. In Experiment 3, we found higher tracking accuracy for inverted faces compared with upright faces. Thus, there was a double dissociation between inversion effects for biological motion and faces, with no inversion effect for our non-biological stimuli (letters, houses).<h4>Conclusions/significance</h4>MOT is sensitive to some, but not all naturalistic aspects of biological stimuli. There does not appear to be a highly specialized role for tracking people. However, MOT appears constrained by principles of object segmentation and grouping, where effectively grouped, coherent objects, but not necessarily biological objects, are tracked most successfully.Lee H de-WitCarmen E LefevreRobert W KentridgeGeraint ReesAyse P SayginPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 3, p e16232 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lee H de-Wit Carmen E Lefevre Robert W Kentridge Geraint Rees Ayse P Saygin Investigating the status of biological stimuli as objects of attention in multiple object tracking.
description	<h4>Background</h4>Humans are able to track multiple simultaneously moving objects. A number of factors have been identified that can influence the ease with which objects can be attended and tracked. Here, we explored the possibility that object tracking abilities may be specialized for tracking biological targets such as people.<h4>Methodology/principal findings</h4>We used the Multiple Object Tracking (MOT) paradigm to explore whether the high-level biological status of the targets affects the efficiency of attentional selection and tracking. In Experiment 1, we assessed the tracking of point-light biological motion figures. As controls, we used either the same stimuli or point-light letters, presented in upright, inverted or scrambled configurations. While scrambling significantly affected performance for both letters and point-light figures, there was an effect of inversion restricted to biological motion, inverted figures being harder to track. In Experiment 2, we found that tracking performance was equivalent for natural point-light walkers and 'moon-walkers', whose implied direction was incongruent with their actual direction of motion. In Experiment 3, we found higher tracking accuracy for inverted faces compared with upright faces. Thus, there was a double dissociation between inversion effects for biological motion and faces, with no inversion effect for our non-biological stimuli (letters, houses).<h4>Conclusions/significance</h4>MOT is sensitive to some, but not all naturalistic aspects of biological stimuli. There does not appear to be a highly specialized role for tracking people. However, MOT appears constrained by principles of object segmentation and grouping, where effectively grouped, coherent objects, but not necessarily biological objects, are tracked most successfully.
format	article
author	Lee H de-Wit Carmen E Lefevre Robert W Kentridge Geraint Rees Ayse P Saygin
author_facet	Lee H de-Wit Carmen E Lefevre Robert W Kentridge Geraint Rees Ayse P Saygin
author_sort	Lee H de-Wit
title	Investigating the status of biological stimuli as objects of attention in multiple object tracking.
title_short	Investigating the status of biological stimuli as objects of attention in multiple object tracking.
title_full	Investigating the status of biological stimuli as objects of attention in multiple object tracking.
title_fullStr	Investigating the status of biological stimuli as objects of attention in multiple object tracking.
title_full_unstemmed	Investigating the status of biological stimuli as objects of attention in multiple object tracking.
title_sort	investigating the status of biological stimuli as objects of attention in multiple object tracking.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/ece2a7ec2c2d43e390a5838377c9c561
work_keys_str_mv	AT leehdewit investigatingthestatusofbiologicalstimuliasobjectsofattentioninmultipleobjecttracking AT carmenelefevre investigatingthestatusofbiologicalstimuliasobjectsofattentioninmultipleobjecttracking AT robertwkentridge investigatingthestatusofbiologicalstimuliasobjectsofattentioninmultipleobjecttracking AT geraintrees investigatingthestatusofbiologicalstimuliasobjectsofattentioninmultipleobjecttracking AT aysepsaygin investigatingthestatusofbiologicalstimuliasobjectsofattentioninmultipleobjecttracking
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Investigating the status of biological stimuli as objects of attention in multiple object tracking.

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