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Depth Plane Separation Affects Both Lightness Contrast and Assimilation
Lightness contrast and assimilation are two opposite phenomena: contrast occurs when a gray target perceptually acquires a complementary color than the bordering, inducing, surfaces; assimilation is when a gray target perceptually acquires the same color component as the inducers. Previous research...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7490546/ https://www.ncbi.nlm.nih.gov/pubmed/32982864 http://dx.doi.org/10.3389/fpsyg.2020.02114 |
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author | Soranzo, Alessandro Acaster, Steph Taroyan, Naira Reidy, John |
author_facet | Soranzo, Alessandro Acaster, Steph Taroyan, Naira Reidy, John |
author_sort | Soranzo, Alessandro |
collection | PubMed |
description | Lightness contrast and assimilation are two opposite phenomena: contrast occurs when a gray target perceptually acquires a complementary color than the bordering, inducing, surfaces; assimilation is when a gray target perceptually acquires the same color component as the inducers. Previous research has shown that both phenomena are affected by the manipulation of depth between the inducers and target. However, different results have been reported; it is not clear whether contrast persists when inducers are non-coplanar with the target. Previous studies differ for the spatial configuration of the stimuli and the technique adopted to manipulate depth. The aim of this research was to measure the effects of manipulating the depth between inducers and target in comparable conditions. Results show that contrast persists, but largely reduces, after depth manipulation while assimilation reverses to contrast. Furthermore, interesting asymmetries between white and black inducers emerged with white inducers favoring contrast and black inducers favoring assimilation. These results provide further evidence that high-level processes of visual processing are involved in both phenomena, with important consequences for lightness theories. |
format | Online Article Text |
id | pubmed-7490546 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-74905462020-09-25 Depth Plane Separation Affects Both Lightness Contrast and Assimilation Soranzo, Alessandro Acaster, Steph Taroyan, Naira Reidy, John Front Psychol Psychology Lightness contrast and assimilation are two opposite phenomena: contrast occurs when a gray target perceptually acquires a complementary color than the bordering, inducing, surfaces; assimilation is when a gray target perceptually acquires the same color component as the inducers. Previous research has shown that both phenomena are affected by the manipulation of depth between the inducers and target. However, different results have been reported; it is not clear whether contrast persists when inducers are non-coplanar with the target. Previous studies differ for the spatial configuration of the stimuli and the technique adopted to manipulate depth. The aim of this research was to measure the effects of manipulating the depth between inducers and target in comparable conditions. Results show that contrast persists, but largely reduces, after depth manipulation while assimilation reverses to contrast. Furthermore, interesting asymmetries between white and black inducers emerged with white inducers favoring contrast and black inducers favoring assimilation. These results provide further evidence that high-level processes of visual processing are involved in both phenomena, with important consequences for lightness theories. Frontiers Media S.A. 2020-09-01 /pmc/articles/PMC7490546/ /pubmed/32982864 http://dx.doi.org/10.3389/fpsyg.2020.02114 Text en Copyright © 2020 Soranzo, Acaster, Taroyan and Reidy. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Psychology Soranzo, Alessandro Acaster, Steph Taroyan, Naira Reidy, John Depth Plane Separation Affects Both Lightness Contrast and Assimilation |
title | Depth Plane Separation Affects Both Lightness Contrast and Assimilation |
title_full | Depth Plane Separation Affects Both Lightness Contrast and Assimilation |
title_fullStr | Depth Plane Separation Affects Both Lightness Contrast and Assimilation |
title_full_unstemmed | Depth Plane Separation Affects Both Lightness Contrast and Assimilation |
title_short | Depth Plane Separation Affects Both Lightness Contrast and Assimilation |
title_sort | depth plane separation affects both lightness contrast and assimilation |
topic | Psychology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7490546/ https://www.ncbi.nlm.nih.gov/pubmed/32982864 http://dx.doi.org/10.3389/fpsyg.2020.02114 |
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