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dc.contributor.author
Chambeaud, Javier G.  
dc.contributor.author
Martín, Andrés  
dc.contributor.author
Barraza, Jose Fernando  
dc.date.available
2017-01-25T19:59:44Z  
dc.date.issued
2014-06  
dc.identifier.citation
Chambeaud, Javier G.; Martín, Andrés; Barraza, Jose Fernando; Effect of disparity on the perception of motion-defined contours; Pontifícia Universidade Católica do Río de Janeiro; Psychology and Neuroscience; 7; 2; 6-2014; 91-101  
dc.identifier.issn
1984-3054  
dc.identifier.uri
http://hdl.handle.net/11336/11930  
dc.description.abstract
We present three experiments that explored the effect of binocular disparity on the perception of contours defined by motion in a Spatiotemporal Boundary Formation. Depending on the disparity, the stimulus is perceived as an object that moves behind a holed surface (occluded configuration) or as a luminous transparency that moves over a surface that contains dots (occluding configuration). In all of the experiments, we used a Vernier task to assess the strength of contour perception. In the first experiment, we measured acuity as a function of disparity for a range of speeds and dot densities. The results showed that, despite the difference in the percepts, acuity was similar in both situations, replicating the dependence on speed and dot density demonstrated in previous studies. In the second experiment, the results showed that the dynamics of contour integration were identical for both occluded and occluding configurations. In the third experiment, we tested whether the mechanism of contour integration works independently from the interpretation of the scene. In this experiment, we inverted the disparity during stimulus presentation so that the stimulus switched between occluded and occluding configurations. The results showed that the switch of the depth order increased the threshold to the value obtained with a shorter presentation time. This might be produced by a resetting of the integration process driven by the change of depth order. The results are discussed within a conceptual model that places the process of contour integration in the context of the perception of objects in a Spatiotemporal Boundary Formation.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Pontifícia Universidade Católica do Río de Janeiro  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
CONTOUR COMPLETION  
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SPATIOTEMPORAL BOUNDARY FORMATION  
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VERNIER ACUITY  
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Otras Ciencias Físicas  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Effect of disparity on the perception of motion-defined contours  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-01-24T18:31:08Z  
dc.identifier.eissn
1983-3288  
dc.journal.volume
7  
dc.journal.number
2  
dc.journal.pagination
91-101  
dc.journal.pais
Brasil  
dc.journal.ciudad
Río de Janeiro  
dc.description.fil
Fil: Chambeaud, Javier G.. Universidad Nacional de Tucumán; Argentina  
dc.description.fil
Fil: Martín, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Investigación en Luz, Ambiente y Visión. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Instituto de Investigación en Luz, Ambiente y Visión; Argentina  
dc.description.fil
Fil: Barraza, Jose Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Investigación en Luz, Ambiente y Visión. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Instituto de Investigación en Luz, Ambiente y Visión; Argentina  
dc.journal.title
Psychology and Neuroscience  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://psycnet.apa.org/index.cfm?fa=search.displayrecord&uid=2014-27572-005  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3922/j.psns.2014.018