August 2016
Volume 16, Issue 12
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2016
Influence of visual complexity on synesthetic color choice for Japanese Kanji characters
Author Affiliations
  • Kazuhiko Yokosawa
    The University of Tokyo
  • Soichiro Takahashi
    The University of Tokyo
  • Michiko Asano
    Rikkyo University
Journal of Vision September 2016, Vol.16, 470. doi:10.1167/16.12.470
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      Kazuhiko Yokosawa, Soichiro Takahashi, Michiko Asano; Influence of visual complexity on synesthetic color choice for Japanese Kanji characters. Journal of Vision 2016;16(12):470. doi: 10.1167/16.12.470.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Grapheme-color synesthesia is a condition in which a visual letter or character induces a specific color sensation. Although grapheme-color association in grapheme-color synesthesia is characterized as idiosyncratic, some regularities in synesthetic sensation have also been reported. For example, Asano and Yokosawa (2012) showed that sound and meaning simultaneously affect the synesthetic color choice for Kanji script (a logographic script used in the Japanese language) in Japanese grapheme-color synesthesia. Many such regularities are related to psycholinguistic properties of graphemes, such as phonology, meaning or concepts, positions in a grapheme sequence, in addition to frequency of occurrence (e.g., Asano & Yokosawa, 2013; Simner, 2007). However, relatively little is known about the influence of more perceptual properties of graphemes on synesthetic colors, properties such as visual complexity. This study explored this issue by examining synesthetic colors for Japanese Kanji characters with both high and low visual complexity in 10 Japanese synesthetes. Results revealed that Kanji characters with high visual complexity elicited synesthetic colors that were darker (lower luminance) than those with low visual complexity. This visual complexity effect was observed even when the grapheme frequency, which is known to influence the luminance of synesthetic colors (Beeli, Esslen, & Jäncke, 2007), was controlled. Ten Japanese non-synesthetic controls were also presented with the same set of Kanji characters as the synesthetes; participants selected a color judged to "go well with the character" with each character. Results showed no effects of visual complexity. These findings suggest that not only psycholinguistic properties, but also more perceptual properties of graphemes influence grapheme-color associations of synesthetes.

Meeting abstract presented at VSS 2016

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