Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach

The study of motion perception through classical psychophysical methods has suggested that independent spatiotemporal filters acting over specific locations in retinal images carry out early motion processing. On the other hand, individual differences approaches have been able to identify a structur...

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Detalles Bibliográficos
Autores: Luna, Raul, Serrano Pedraza, Ignacio
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/112037
Acceso en línea:https://hdl.handle.net/20.500.14352/112037
Access Level:acceso abierto
Palabra clave:159.93
Motion perception
Contrast
Temporal frequency
Motion mechanisms,
Individual differences
Factor analysis
Percepción
Psicología (Psicología)
6106.09 Procesos de Percepción
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repository_id_str
spelling Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approachLuna, RaulSerrano Pedraza, Ignacio159.93Motion perceptionContrastTemporal frequencyMotion mechanisms,Individual differencesFactor analysisPercepciónPsicología (Psicología)Percepción6106.09 Procesos de PercepciónThe study of motion perception through classical psychophysical methods has suggested that independent spatiotemporal filters acting over specific locations in retinal images carry out early motion processing. On the other hand, individual differences approaches have been able to identify a structure of spatiotemporal filters too. In this same fashion—through an individual differences approach—the present study aims to uncover a structure of spatiotemporal frequency selective motion mechanisms. This is done, for the first time, using supra-threshold contrast stimuli in a motion direction discrimination task. Two experiments were performed measuring duration thresholds for drifting 2D Gabor gratings of 0.25, 0.5, 0.75, 1, 1.5, 2, 3 and 6 c/deg. They moved with a speed of 2 deg/sec, with Michelson contrasts of 0.1 or 0.9 (Experiment 1) or had a contrast of 0.9 drifting with a temporal frequency of 2 Hz or 8 Hz (Experiment 2). Principal component analyses uncover three factors in each of four conditions. When Varimax-rotated, these are seen to be selective to spatial frequencies lower than 0.5 c/deg, intermediate ones from 0.5 to 1–1.5 c/deg, and frequencies greater than 1–1.5 c/deg. Direct Oblimin rotations indicate that factors are moderately correlated. Further analyses show very slight differences in the correlational structures between contrast conditions (0.1 vs. 0.9), and no differences between temporal frequency conditions (2 Hz vs. 8 Hz). To conclude, the idea of a three-factor structure in motion processing for low, intermediate, and high spatial frequencies is supported.ElsevierUniversidad Complutense de Madrid20202020-01-0120202020-01-01journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://hdl.handle.net/20.500.14352/112037reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Not available BES-2015-074077 BES-2015-074077Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PGC2018-093406-B-I00 LA INTERACCION BINOCULAR EN LA PERCEPCION DEL MOVIMIENTO: IMPLICACIONES EN LA ACTIVACION DE LOS MECANISMOS VISUALES INHIBITORIOSopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1120372026-06-02T12:44:21Z
dc.title.none.fl_str_mv Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach
title Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach
spellingShingle Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach
Luna, Raul
159.93
Motion perception
Contrast
Temporal frequency
Motion mechanisms,
Individual differences
Factor analysis
Percepción
Psicología (Psicología)
Percepción
6106.09 Procesos de Percepción
title_short Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach
title_full Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach
title_fullStr Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach
title_full_unstemmed Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach
title_sort Taller Docta.. Evidence for different spatiotemporal mechanisms using duration thresholds: An individual differences approach
dc.creator.none.fl_str_mv Luna, Raul
Serrano Pedraza, Ignacio
author Luna, Raul
author_facet Luna, Raul
Serrano Pedraza, Ignacio
author_role author
author2 Serrano Pedraza, Ignacio
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 159.93
Motion perception
Contrast
Temporal frequency
Motion mechanisms,
Individual differences
Factor analysis
Percepción
Psicología (Psicología)
Percepción
6106.09 Procesos de Percepción
topic 159.93
Motion perception
Contrast
Temporal frequency
Motion mechanisms,
Individual differences
Factor analysis
Percepción
Psicología (Psicología)
Percepción
6106.09 Procesos de Percepción
description The study of motion perception through classical psychophysical methods has suggested that independent spatiotemporal filters acting over specific locations in retinal images carry out early motion processing. On the other hand, individual differences approaches have been able to identify a structure of spatiotemporal filters too. In this same fashion—through an individual differences approach—the present study aims to uncover a structure of spatiotemporal frequency selective motion mechanisms. This is done, for the first time, using supra-threshold contrast stimuli in a motion direction discrimination task. Two experiments were performed measuring duration thresholds for drifting 2D Gabor gratings of 0.25, 0.5, 0.75, 1, 1.5, 2, 3 and 6 c/deg. They moved with a speed of 2 deg/sec, with Michelson contrasts of 0.1 or 0.9 (Experiment 1) or had a contrast of 0.9 drifting with a temporal frequency of 2 Hz or 8 Hz (Experiment 2). Principal component analyses uncover three factors in each of four conditions. When Varimax-rotated, these are seen to be selective to spatial frequencies lower than 0.5 c/deg, intermediate ones from 0.5 to 1–1.5 c/deg, and frequencies greater than 1–1.5 c/deg. Direct Oblimin rotations indicate that factors are moderately correlated. Further analyses show very slight differences in the correlational structures between contrast conditions (0.1 vs. 0.9), and no differences between temporal frequency conditions (2 Hz vs. 8 Hz). To conclude, the idea of a three-factor structure in motion processing for low, intermediate, and high spatial frequencies is supported.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-01-01
2020
2020-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/112037
url https://hdl.handle.net/20.500.14352/112037
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Not available BES-2015-074077 BES-2015-074077
Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PGC2018-093406-B-I00 LA INTERACCION BINOCULAR EN LA PERCEPCION DEL MOVIMIENTO: IMPLICACIONES EN LA ACTIVACION DE LOS MECANISMOS VISUALES INHIBITORIOS
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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