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Translucence perception is not dependent on cortical areas critical for processing colour or texture()

Translucence is an important property of natural materials, and human observers are adept at perceiving changes in translucence. Perceptions of different material properties appear to arise from different cortical regions, and it is therefore plausible that the perception of translucence is dependen...

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Autores principales: Chadwick, A.C., Heywood, C.A., Smithson, H.E., Kentridge, R.W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pergamon Press 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6562271/
https://www.ncbi.nlm.nih.gov/pubmed/29154901
http://dx.doi.org/10.1016/j.neuropsychologia.2017.11.009
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author Chadwick, A.C.
Heywood, C.A.
Smithson, H.E.
Kentridge, R.W.
author_facet Chadwick, A.C.
Heywood, C.A.
Smithson, H.E.
Kentridge, R.W.
author_sort Chadwick, A.C.
collection PubMed
description Translucence is an important property of natural materials, and human observers are adept at perceiving changes in translucence. Perceptions of different material properties appear to arise from different cortical regions, and it is therefore plausible that the perception of translucence is dependent on specialised regions, separate from those important for colour and texture processing. To test for anatomical independence between areas necessary for colour, texture and translucence perception we assessed translucency perception in a cortically colour blind observer, who performs at chance on tasks of colour and texture discrimination. Firstly, in order to establish that MS has shown no significant recovery, we assessed his colour perception performance on the Farnsworth-Munsell 100 Hue Test. Secondly, we tested him with two translucence ranking tasks. In one task, stimuli were images of glasses of tea varying in tea strength. In the other, stimuli were glasses of tea varying only in milkiness. MS was able to systematically rank both strength and milkiness, although less consistently than controls, and for tea strength his rankings were in the opposite order. An additional group of controls tested with greyscale versions of the images succeeded at the tasks, albeit slightly less consistently on the milkiness task, showing that the performance of normal observers cannot be transformed into the performance of MS simply by removing colour information from the stimuli. The systematic performance of MS suggests that some aspects of translucence perception do not depend on regions critical for colour and texture processing.
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spelling pubmed-65622712019-06-17 Translucence perception is not dependent on cortical areas critical for processing colour or texture() Chadwick, A.C. Heywood, C.A. Smithson, H.E. Kentridge, R.W. Neuropsychologia Article Translucence is an important property of natural materials, and human observers are adept at perceiving changes in translucence. Perceptions of different material properties appear to arise from different cortical regions, and it is therefore plausible that the perception of translucence is dependent on specialised regions, separate from those important for colour and texture processing. To test for anatomical independence between areas necessary for colour, texture and translucence perception we assessed translucency perception in a cortically colour blind observer, who performs at chance on tasks of colour and texture discrimination. Firstly, in order to establish that MS has shown no significant recovery, we assessed his colour perception performance on the Farnsworth-Munsell 100 Hue Test. Secondly, we tested him with two translucence ranking tasks. In one task, stimuli were images of glasses of tea varying in tea strength. In the other, stimuli were glasses of tea varying only in milkiness. MS was able to systematically rank both strength and milkiness, although less consistently than controls, and for tea strength his rankings were in the opposite order. An additional group of controls tested with greyscale versions of the images succeeded at the tasks, albeit slightly less consistently on the milkiness task, showing that the performance of normal observers cannot be transformed into the performance of MS simply by removing colour information from the stimuli. The systematic performance of MS suggests that some aspects of translucence perception do not depend on regions critical for colour and texture processing. Pergamon Press 2019-05 /pmc/articles/PMC6562271/ /pubmed/29154901 http://dx.doi.org/10.1016/j.neuropsychologia.2017.11.009 Text en © 2018 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chadwick, A.C.
Heywood, C.A.
Smithson, H.E.
Kentridge, R.W.
Translucence perception is not dependent on cortical areas critical for processing colour or texture()
title Translucence perception is not dependent on cortical areas critical for processing colour or texture()
title_full Translucence perception is not dependent on cortical areas critical for processing colour or texture()
title_fullStr Translucence perception is not dependent on cortical areas critical for processing colour or texture()
title_full_unstemmed Translucence perception is not dependent on cortical areas critical for processing colour or texture()
title_short Translucence perception is not dependent on cortical areas critical for processing colour or texture()
title_sort translucence perception is not dependent on cortical areas critical for processing colour or texture()
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6562271/
https://www.ncbi.nlm.nih.gov/pubmed/29154901
http://dx.doi.org/10.1016/j.neuropsychologia.2017.11.009
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