Synesthesia does not help to recover perceptual dominance following flash suppression

Abstract Grapheme-colour synesthesia occurs when letters or numbers elicit an abnormal colour sensation (e.g., printed black letters are perceived as coloured). This phenomenon is typically reported following explicit presentation of graphemes. Very few studies have investigated colour sensations in...

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Autores principales:	Diana Jimena Arias, Dave Saint-Amour
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a5b9ee60c6ca4327ba2bbb7240f162f0
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spelling	oai:doaj.org-article:a5b9ee60c6ca4327ba2bbb7240f162f02021-12-02T18:15:34ZSynesthesia does not help to recover perceptual dominance following flash suppression10.1038/s41598-021-87223-w2045-2322https://doaj.org/article/a5b9ee60c6ca4327ba2bbb7240f162f02021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87223-whttps://doaj.org/toc/2045-2322Abstract Grapheme-colour synesthesia occurs when letters or numbers elicit an abnormal colour sensation (e.g., printed black letters are perceived as coloured). This phenomenon is typically reported following explicit presentation of graphemes. Very few studies have investigated colour sensations in synesthesia in the absence of visual awareness. We took advantage of the dichoptic flash suppression paradigm to temporarily render a stimulus presented to one eye invisible. Synesthetic alphanumeric and non-synesthetic stimuli were presented to 21 participants (11 synesthetes) in achromatic and chromatic experimental conditions. The test stimulus was first displayed to one eye and then masked by a sudden presentation of visual noise in the other eye (flash suppression). The time for an image to be re-perceived following the onset of the suppressive noise was calculated. Trials where there was no flash suppression performed but instead mimicked the perceptual suppression of the flash were also tested. Results showed that target detection by synesthetes was significantly better than by controls in the absence of flash suppression. No difference was found between the groups in the flash suppression condition. Our findings suggest that synesthesia is associated with enhanced perception for overt recognition, but does not provide an advantage in recovering from a perceptual suppression. Further studies are needed to investigate synesthesia in relation to visual awareness.Diana Jimena AriasDave Saint-AmourNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Diana Jimena Arias Dave Saint-Amour Synesthesia does not help to recover perceptual dominance following flash suppression
description	Abstract Grapheme-colour synesthesia occurs when letters or numbers elicit an abnormal colour sensation (e.g., printed black letters are perceived as coloured). This phenomenon is typically reported following explicit presentation of graphemes. Very few studies have investigated colour sensations in synesthesia in the absence of visual awareness. We took advantage of the dichoptic flash suppression paradigm to temporarily render a stimulus presented to one eye invisible. Synesthetic alphanumeric and non-synesthetic stimuli were presented to 21 participants (11 synesthetes) in achromatic and chromatic experimental conditions. The test stimulus was first displayed to one eye and then masked by a sudden presentation of visual noise in the other eye (flash suppression). The time for an image to be re-perceived following the onset of the suppressive noise was calculated. Trials where there was no flash suppression performed but instead mimicked the perceptual suppression of the flash were also tested. Results showed that target detection by synesthetes was significantly better than by controls in the absence of flash suppression. No difference was found between the groups in the flash suppression condition. Our findings suggest that synesthesia is associated with enhanced perception for overt recognition, but does not provide an advantage in recovering from a perceptual suppression. Further studies are needed to investigate synesthesia in relation to visual awareness.
format	article
author	Diana Jimena Arias Dave Saint-Amour
author_facet	Diana Jimena Arias Dave Saint-Amour
author_sort	Diana Jimena Arias
title	Synesthesia does not help to recover perceptual dominance following flash suppression
title_short	Synesthesia does not help to recover perceptual dominance following flash suppression
title_full	Synesthesia does not help to recover perceptual dominance following flash suppression
title_fullStr	Synesthesia does not help to recover perceptual dominance following flash suppression
title_full_unstemmed	Synesthesia does not help to recover perceptual dominance following flash suppression
title_sort	synesthesia does not help to recover perceptual dominance following flash suppression
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a5b9ee60c6ca4327ba2bbb7240f162f0
work_keys_str_mv	AT dianajimenaarias synesthesiadoesnothelptorecoverperceptualdominancefollowingflashsuppression AT davesaintamour synesthesiadoesnothelptorecoverperceptualdominancefollowingflashsuppression
_version_	1718378350550974464

Synesthesia does not help to recover perceptual dominance following flash suppression

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