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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...

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Autores principales: Soranzo, Alessandro, Acaster, Steph, Taroyan, Naira, Reidy, John
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
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.
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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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