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The phenomenon of synesthesia has received a great deal of interest recently in the scientific literature. Many previous studies stressed the unidirectional nature of this phenomenon. For example, color-grapheme synesthetes automatically perceive achromatic numbers as colored (e.g. 7 is turquoise). Conversely, colors do not automatically give rise to any sort of number experience (e.g. turquoise is 7). In contrast to the common view, we report on a digit-color synesthete in whom colors can evoke numerical representations in the absence of any digit presentation. It is concluded that in synesthesia there is a reciprocal rather than unidirectional flow of information between dimensions.

Original publication

DOI

10.1016/j.neuroscience.2005.08.057

Type

Journal article

Journal

Neuroscience

Publication Date

2006

Volume

137

Pages

3 - 5

Keywords

Adult, Color Perception, Humans, Male, Perceptual Disorders, Photic Stimulation