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The role of spatial and temporal information in biological motion perception

Point-light biological motion stimuli provide spatio-temporal information about the structure of the human body in motion. Manipulation of the spatial structure of point-light stimuli reduces the ability of human observers to perceive biological motion. A recent study has reported that interference...

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Detalles Bibliográficos
Autores principales: Lange, Joachim, Lappe, Markus
Formato: Texto
Lenguaje:English
Publicado: University of Finance and Management in Warsaw 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2864996/
https://www.ncbi.nlm.nih.gov/pubmed/20517525
http://dx.doi.org/10.2478/v10053-008-0006-3
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author Lange, Joachim
Lappe, Markus
author_facet Lange, Joachim
Lappe, Markus
author_sort Lange, Joachim
collection PubMed
description Point-light biological motion stimuli provide spatio-temporal information about the structure of the human body in motion. Manipulation of the spatial structure of point-light stimuli reduces the ability of human observers to perceive biological motion. A recent study has reported that interference with the spatial structure of pointlight walkers also reduces the evoked eventrelated potentials over the occipitotemporal cortex, but that interference with the temporal structure of the stimuli evoked event-related potentials similar to normal biological motion stimuli. We systematically investigated the influence of spatial and temporal manipulation on 2 common discrimination tasks and compared it with predictions of a neurocomputational model previously proposed. This model first analyzes the spatial structure of the stimulus independently of the temporal information to derive body posture and subsequently analyzes the temporal sequence of body postures to derive movement direction. Similar to the model predictions, the psychophysical results show that human observers need only intact spatial configuration of the stimulus to discriminate the facing direction of a point-light walker. In contrast, movement direction discrimination needs a fully intact spatiotemporal pattern of the stimulus. The activation levels in the model predict the observed eventrelated potentials for the spatial and temporal manipulations.
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spelling pubmed-28649962010-06-01 The role of spatial and temporal information in biological motion perception Lange, Joachim Lappe, Markus Adv Cogn Psychol Research Article Point-light biological motion stimuli provide spatio-temporal information about the structure of the human body in motion. Manipulation of the spatial structure of point-light stimuli reduces the ability of human observers to perceive biological motion. A recent study has reported that interference with the spatial structure of pointlight walkers also reduces the evoked eventrelated potentials over the occipitotemporal cortex, but that interference with the temporal structure of the stimuli evoked event-related potentials similar to normal biological motion stimuli. We systematically investigated the influence of spatial and temporal manipulation on 2 common discrimination tasks and compared it with predictions of a neurocomputational model previously proposed. This model first analyzes the spatial structure of the stimulus independently of the temporal information to derive body posture and subsequently analyzes the temporal sequence of body postures to derive movement direction. Similar to the model predictions, the psychophysical results show that human observers need only intact spatial configuration of the stimulus to discriminate the facing direction of a point-light walker. In contrast, movement direction discrimination needs a fully intact spatiotemporal pattern of the stimulus. The activation levels in the model predict the observed eventrelated potentials for the spatial and temporal manipulations. University of Finance and Management in Warsaw 2008-07-15 /pmc/articles/PMC2864996/ /pubmed/20517525 http://dx.doi.org/10.2478/v10053-008-0006-3 Text en Copyright: © 2008 University of Finance and Management in Warsaw http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Lange, Joachim
Lappe, Markus
The role of spatial and temporal information in biological motion perception
title The role of spatial and temporal information in biological motion perception
title_full The role of spatial and temporal information in biological motion perception
title_fullStr The role of spatial and temporal information in biological motion perception
title_full_unstemmed The role of spatial and temporal information in biological motion perception
title_short The role of spatial and temporal information in biological motion perception
title_sort role of spatial and temporal information in biological motion perception
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2864996/
https://www.ncbi.nlm.nih.gov/pubmed/20517525
http://dx.doi.org/10.2478/v10053-008-0006-3
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