Grapheme learning and grapheme-color synesthesia: Toward a comprehensive model of grapheme-color association

Recent progress in grapheme-color synesthesia research has revealed that certain regularities, as well as individual differences, figure into grapheme-color associations. Although several factors are known to regulate grapheme-color associations, the impact of factors, including their interrelations...

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Main Authors: Michiko eAsano, Kazuhiko eYokosawa
Format: Article
Language:English
Published: Frontiers Media S.A. 2013-11-01
Series:Frontiers in Human Neuroscience
Subjects:
Online Access:http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00757/full
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author Michiko eAsano
Michiko eAsano
Michiko eAsano
Kazuhiko eYokosawa
author_facet Michiko eAsano
Michiko eAsano
Michiko eAsano
Kazuhiko eYokosawa
author_sort Michiko eAsano
collection DOAJ
description Recent progress in grapheme-color synesthesia research has revealed that certain regularities, as well as individual differences, figure into grapheme-color associations. Although several factors are known to regulate grapheme-color associations, the impact of factors, including their interrelationships, on synesthesia remains unclear. We investigated determinants of synesthetic color for graphemes (characters, letters) of Hiragana, a phonetic script in the Japanese language, and the English alphabet. Results revealed that grapheme ordinality was the strongest predictor of synesthetic colors for Hiragana characters, followed by character sound, and visual shape. Ordinality and visual shapes also significantly predicted synesthetic colors for English alphabet letters, however, sounds did not. The relative impact of grapheme properties on grapheme-color associations and the differences between these two writing systems are accounted for by considering the way graphemes are processed in the brain and introduced during an individual's development. A new model is proposed which takes into account the developmental process of grapheme learning. The model provides comprehensive explanation of synesthetic grapheme-color association determination processes, including the differences across writing systems.
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spelling doaj.art-2cb92f51ca624a0c9f58b6e7e7807d2c2022-12-22T00:22:31ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612013-11-01710.3389/fnhum.2013.0075763904Grapheme learning and grapheme-color synesthesia: Toward a comprehensive model of grapheme-color associationMichiko eAsano0Michiko eAsano1Michiko eAsano2Kazuhiko eYokosawa3Keio UniversityThe Japan Society for the Promotion of ScienceTamagawa UniversityThe University of TokyoRecent progress in grapheme-color synesthesia research has revealed that certain regularities, as well as individual differences, figure into grapheme-color associations. Although several factors are known to regulate grapheme-color associations, the impact of factors, including their interrelationships, on synesthesia remains unclear. We investigated determinants of synesthetic color for graphemes (characters, letters) of Hiragana, a phonetic script in the Japanese language, and the English alphabet. Results revealed that grapheme ordinality was the strongest predictor of synesthetic colors for Hiragana characters, followed by character sound, and visual shape. Ordinality and visual shapes also significantly predicted synesthetic colors for English alphabet letters, however, sounds did not. The relative impact of grapheme properties on grapheme-color associations and the differences between these two writing systems are accounted for by considering the way graphemes are processed in the brain and introduced during an individual's development. A new model is proposed which takes into account the developmental process of grapheme learning. The model provides comprehensive explanation of synesthetic grapheme-color association determination processes, including the differences across writing systems.http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00757/fulllanguage developmentgrapheme-color synesthesiagrapheme acquisitiongrapheme discriminationJapanese phonetic characters (Hiragana)perceptual categorization and identification
spellingShingle Michiko eAsano
Michiko eAsano
Michiko eAsano
Kazuhiko eYokosawa
Grapheme learning and grapheme-color synesthesia: Toward a comprehensive model of grapheme-color association
Frontiers in Human Neuroscience
language development
grapheme-color synesthesia
grapheme acquisition
grapheme discrimination
Japanese phonetic characters (Hiragana)
perceptual categorization and identification
title Grapheme learning and grapheme-color synesthesia: Toward a comprehensive model of grapheme-color association
title_full Grapheme learning and grapheme-color synesthesia: Toward a comprehensive model of grapheme-color association
title_fullStr Grapheme learning and grapheme-color synesthesia: Toward a comprehensive model of grapheme-color association
title_full_unstemmed Grapheme learning and grapheme-color synesthesia: Toward a comprehensive model of grapheme-color association
title_short Grapheme learning and grapheme-color synesthesia: Toward a comprehensive model of grapheme-color association
title_sort grapheme learning and grapheme color synesthesia toward a comprehensive model of grapheme color association
topic language development
grapheme-color synesthesia
grapheme acquisition
grapheme discrimination
Japanese phonetic characters (Hiragana)
perceptual categorization and identification
url http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00757/full
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