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Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition

Abstract. Detection of regularities (e.g., symmetry, repetition) can be used to investigate object and shape perception. Symmetry and nearby lines may both signal that one object is present, so moving lines apart may disrupt symmetry detection, while repetition may signal that multiple objects are p...

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Detalles Bibliográficos
Autores principales: Lawson, Rebecca, Ajvani, Henna, Cecchetto, Stefano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hogrefe Publishing 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5082038/
https://www.ncbi.nlm.nih.gov/pubmed/27750520
http://dx.doi.org/10.1027/1618-3169/a000329
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author Lawson, Rebecca
Ajvani, Henna
Cecchetto, Stefano
author_facet Lawson, Rebecca
Ajvani, Henna
Cecchetto, Stefano
author_sort Lawson, Rebecca
collection PubMed
description Abstract. Detection of regularities (e.g., symmetry, repetition) can be used to investigate object and shape perception. Symmetry and nearby lines may both signal that one object is present, so moving lines apart may disrupt symmetry detection, while repetition may signal that multiple objects are present. Participants discriminated symmetrical/irregular and repeated/irregular pairs of lines. For vision, as predicted, increased line separation disrupted symmetry detection more than repetition detection. For haptics, symmetry and repetition detection were similarly disrupted by increased line separation; also, symmetry was easier to detect than repetition for one-handed exploration and for body midline-aligned stimuli, whereas symmetry was harder to detect than repetition with two-handed exploration of stimuli oriented across the body. These effects of exploration and stimulus orientation show the influence of modality-specific processing rather than properties of the external world on regularity detection. These processes may, in turn, provide insights into the nature of objectness in vision and in touch.
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spelling pubmed-50820382016-11-16 Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition Lawson, Rebecca Ajvani, Henna Cecchetto, Stefano Exp Psychol Research Article Abstract. Detection of regularities (e.g., symmetry, repetition) can be used to investigate object and shape perception. Symmetry and nearby lines may both signal that one object is present, so moving lines apart may disrupt symmetry detection, while repetition may signal that multiple objects are present. Participants discriminated symmetrical/irregular and repeated/irregular pairs of lines. For vision, as predicted, increased line separation disrupted symmetry detection more than repetition detection. For haptics, symmetry and repetition detection were similarly disrupted by increased line separation; also, symmetry was easier to detect than repetition for one-handed exploration and for body midline-aligned stimuli, whereas symmetry was harder to detect than repetition with two-handed exploration of stimuli oriented across the body. These effects of exploration and stimulus orientation show the influence of modality-specific processing rather than properties of the external world on regularity detection. These processes may, in turn, provide insights into the nature of objectness in vision and in touch. Hogrefe Publishing 2016-10-18 2016 /pmc/articles/PMC5082038/ /pubmed/27750520 http://dx.doi.org/10.1027/1618-3169/a000329 Text en © 2016 Hogrefe Publishing. Distributed as a Hogrefe OpenMind article under the license [CC BY 4.0 (http://creativecommons.org/licenses/by/4.0/)]
spellingShingle Research Article
Lawson, Rebecca
Ajvani, Henna
Cecchetto, Stefano
Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition
title Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition
title_full Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition
title_fullStr Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition
title_full_unstemmed Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition
title_short Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition
title_sort effects of line separation and exploration on the visual and haptic detection of symmetry and repetition
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5082038/
https://www.ncbi.nlm.nih.gov/pubmed/27750520
http://dx.doi.org/10.1027/1618-3169/a000329
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