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Updated: Jun 18, 2026

Training Synesthetic Letter-color Associations by Reading in Color
Published on: February 20, 2014
Visual field heterogeneity, laterality, and eidetic imagery in synesthesia
David Brang1, V S Ramachandran
1Center for Brain and Cognition, University of California, San Diego, La Jolla, CA, USA.
Abstract:
JS was a grapheme-color synesthete in whom numerals and letters of the alphabet consistently evoked colors. In the first set of experiments we showed that the color - in a consistent and reliable manner - was most pronounced in the left visual field and in central vision. In the second experiment we devised a novel test for eidetic imagery and showed that his self-report of enhanced imagery could be verified experimentally. The implications of these findings for the level at which synesthesia occurs, the 'enhanced cross-activation' model, and the mechanisms of visual memory are discussed.
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