August 2010
Volume 10, Issue 7
Vision Sciences Society Annual Meeting Abstract  |   August 2010
When the Inducing Grapheme Changes and When the Induced Synesthetic Color Changes
Author Affiliations
  • Suhkyung Kim
    Department of Psychology, Korea University
  • Chai-Youn Kim
    Department of Psychology, Korea University
Journal of Vision August 2010, Vol.10, 873. doi:
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Suhkyung Kim, Chai-Youn Kim; When the Inducing Grapheme Changes and When the Induced Synesthetic Color Changes. Journal of Vision 2010;10(7):873.

      Download citation file:

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

  • Supplements

Background: It has been shown that conscious awareness of an inducing grapheme is necessary for synesthetic color experience (Mattingley et al., 2001; Rich & Mattingley, 2005). However, whether grapheme recognition should precede synesthetic color perception has not been addressed. Using particular grapheme pairs that entail ambiguous recognition when rotated, i.e., W-M or 6-9, we investigated the temporal relationship between grapheme recognition and synesthetic color perception. Experiment 1: In 2 separate blocks of trials, 9 synesthetes observed either the letter W(M) or the digit 6(9) followed by a pattern mask. The presented graphemes were in one of seven different angles between 0 and 180 degrees. Observers responded by pressing one of two keyboard buttons indicating the perceived identity of the grapheme in the grapheme recognition task (e.g., W or M) or the experienced synesthetic color (e.g., purple or green for SK) in the synesthetic color task. For the most synesthetes tested, reaction time(RT) was slower in the synesthetic color task than in the grapheme recognition task. Experiment 2: In 2 separate blocks of trials, a subset of synesthetes who participated in Experiment 1 observed either the letter or the digit rotating in clockwise or counterclockwise direction. The initial angle of the grapheme was varied. Observers responded by pressing a button indicating the moment the grapheme changes its identity (e.g., from W to M or from M to W) or the moment the experienced synesthetic color changes (e.g., from purple to green or from green to purple for SK). For all the synesthetes tested, the pattern of results shown by perceptual latency in Experiment 2 was parallel to that shown by RT in Experiment 1. To further investigate whether grapheme familiarity influences the microgenesis of synesthetic color experiences, we're now testing Korean synesthetes who see colors on both alphanumeric and Korean characters.

Kim, S. Kim, C.-Y. (2010). When the Inducing Grapheme Changes and When the Induced Synesthetic Color Changes [Abstract]. Journal of Vision, 10(7):873, 873a,, doi:10.1167/10.7.873. [CrossRef]
 This work was supported by Korea Research Foundation- Grant funded by the Korean Government (KRF-2009-332-H00011).

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.