Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components

Motion direction discrimination becomes impaired when combinations of drifting high spatial frequency (HSF) and static low spatial frequency (LSF) patterns are merged into a compound stimulus. Such impairment has been suggested to occur due to an interaction between motion sensors tuned to coarse an...

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Detalles Bibliográficos
Autores: Luna del Valle, Raúl, 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:20.500.14352/110959
Acceso en línea:https://hdl.handle.net/20.500.14352/110959
Access Level:acceso abierto
Palabra clave:159.93
Motion perception
Contrast
Spatial frequency
Interaction between fine and coarse scales
Motion sensors
Inhibition
Percepción
6106.09 Procesos de Percepción
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spelling Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating componentsLuna del Valle, RaúlSerrano Pedraza, Ignacio159.93Motion perceptionContrastSpatial frequencyInteraction between fine and coarse scalesMotion sensorsInhibitionPercepción6106.09 Procesos de PercepciónMotion direction discrimination becomes impaired when combinations of drifting high spatial frequency (HSF) and static low spatial frequency (LSF) patterns are merged into a compound stimulus. Such impairment has been suggested to occur due to an interaction between motion sensors tuned to coarse and fine scale spatial patterns. This interaction is modulated by different stimulus parameters like temporal frequency, size, the spectral components mixed, and their relative contrast. The present research precisely aims to explore in a deeper way the interaction’s dependency upon the spatial frequency and the relative contrast of the components when both move coherently. Two experiments were therefore performed measuring duration thresholds (Experiment 1) and proportion of correct responses (Experiment 2) in a motion direction discrimination task. Stimuli were vertical Gabor patches of 4 deg diameter horizontally drifting with a speed of 2 deg/sec. Simple LSF and HSF stimuli as well as complex stimuli where both components moved coherently (LSFm + HSFm) were used. These were grouped in the following LSF and HSF pairs: 0.25–0.75, 0.5–1.5, 1–3 and 2–6 c/deg. Each component had a Michelson contrast of 28% or 7%, giving rise to different relative contrast combinations. Most interestingly, the results show a decrease in performance for complex stimuli with respect to each of their simple components when the LSF component has a lower contrast than the HSF one. The decrease depends on the particular spatial frequencies mixed in a stimulus. Further knowledge about the inhibitory mechanism is thus provided, revealing its joint dependency upon contrast and spatial frequency.ElsevierUniversidad Complutense de Madrid20202020-02-0120202020-02-01journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/110959reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengAgencia 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 INHIBITORIOSMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Not available BES-2015-074077 BES-2015-074077open accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1109592026-06-02T12:44:21Z
dc.title.none.fl_str_mv Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components
title Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components
spellingShingle Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components
Luna del Valle, Raúl
159.93
Motion perception
Contrast
Spatial frequency
Interaction between fine and coarse scales
Motion sensors
Inhibition
Percepción
6106.09 Procesos de Percepción
title_short Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components
title_full Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components
title_fullStr Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components
title_full_unstemmed Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components
title_sort Interaction between motion scales: When performance in motion discrimination is worse for a compound stimulus than for its integrating components
dc.creator.none.fl_str_mv Luna del Valle, Raúl
Serrano Pedraza, Ignacio
author Luna del Valle, Raúl
author_facet Luna del Valle, Raúl
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
Spatial frequency
Interaction between fine and coarse scales
Motion sensors
Inhibition
Percepción
6106.09 Procesos de Percepción
topic 159.93
Motion perception
Contrast
Spatial frequency
Interaction between fine and coarse scales
Motion sensors
Inhibition
Percepción
6106.09 Procesos de Percepción
description Motion direction discrimination becomes impaired when combinations of drifting high spatial frequency (HSF) and static low spatial frequency (LSF) patterns are merged into a compound stimulus. Such impairment has been suggested to occur due to an interaction between motion sensors tuned to coarse and fine scale spatial patterns. This interaction is modulated by different stimulus parameters like temporal frequency, size, the spectral components mixed, and their relative contrast. The present research precisely aims to explore in a deeper way the interaction’s dependency upon the spatial frequency and the relative contrast of the components when both move coherently. Two experiments were therefore performed measuring duration thresholds (Experiment 1) and proportion of correct responses (Experiment 2) in a motion direction discrimination task. Stimuli were vertical Gabor patches of 4 deg diameter horizontally drifting with a speed of 2 deg/sec. Simple LSF and HSF stimuli as well as complex stimuli where both components moved coherently (LSFm + HSFm) were used. These were grouped in the following LSF and HSF pairs: 0.25–0.75, 0.5–1.5, 1–3 and 2–6 c/deg. Each component had a Michelson contrast of 28% or 7%, giving rise to different relative contrast combinations. Most interestingly, the results show a decrease in performance for complex stimuli with respect to each of their simple components when the LSF component has a lower contrast than the HSF one. The decrease depends on the particular spatial frequencies mixed in a stimulus. Further knowledge about the inhibitory mechanism is thus provided, revealing its joint dependency upon contrast and spatial frequency.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-02-01
2020
2020-02-01
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/20.500.14352/110959
url https://hdl.handle.net/20.500.14352/110959
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv 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
Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Not available BES-2015-074077 BES-2015-074077
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/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-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 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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