True Strange Library

The curious collection of a slightly mad scientist

What color is the letter A? Fisher-Price Induced Synesthesia Letter-color matching data from the 11 subjects. The diagram shows the color selected for each letter, averaged across three trials for each subject. The left-most column indicates the colors of the Fisher-Price refrigerator magnets used by all but 1 of the subjects as children.

… Synesthesia is a rare perceptual phenomenon in which the stimulation of one sensory modality, or exposure to one type of stimulus, leads to a sensory (or cognitive) experience in a different, non-stimulated modality. For instance, some synesthetes have colored hearing while others might taste shapes.

GRAPHEME-COLOR SYNESTHESIA is the condition in which individual printed letters are perceived in a specific, constant color. This occurs involuntarily and in the absence of colored font. It is the most common and widely-studied of all types of synesthesia (Mattingley, 2009). Many studies have suggested that the phenomenon is not due to associative learning, i.e. exposure to colored letters or blocks as a child (Rich et al., 2005). One neurological explanation is that it’s due to greater white matter connectivity between the inferior temporal lobe regions that process letters and colors (Rouw & Scholte, 2007). 1

Learned Synesthesia

However, a new study has identified 11 synesthetes whose grapheme-color mappings appear to be based on the Fisher Price plastic letter set made between 1972-1990 (Witthoft & Winawer, 2013). 2 Letter-color mapping data were obtained from the participants using either The Synesthesia Battery Web site ( or in-house software. This required that the subjects use a color picker to identify the hue of 26 upper case letters and 10 numerals three times each (presented in random order). They did this in two separate sessions, and then the consistency within and across sessions was evaluated. The participants also completed a speeded Stroop-like task, where they had to identify whether the color font was congruent (A) or incongruent (A) relative to their synesthetic mapping.

Lo and behold, the resultant mappings were “startlingly similar” to the colors used in the Fisher Price toys from their childhoods! And 10 of the 11 participants reported owning the colorful plastic magnetic letters. In the figure below, the subjects are arranged left to right according to the number of matches with the Fisher Price set. S11 showed the fewest matches (n=14), yet the probability of obtaining 14 or more matches in 26 chances was estimated to be less than 1 in 1 billion…

Thus, the results provided clear evidence of a learned contribution to color-grapheme synesthesia, at least in this group of participants. But they don’t negate a more purely perceptual version of the phenomenon in other synesthetes.

via The Neurocritic: Fisher-Price Synesthesia.

One comment on “What color is the letter A? Fisher-Price Induced Synesthesia

  1. Artist
    January 21, 2013

    Somehow I can’t imagine that you can learn synesthesia. In my experience as synesthete I have to say that pregiven colors to letters and numbers have the opposite effect by just confusing if they don’ match the colors I see. Recently I even found out that my synesthesia paintings emanate energy. Because of synesthesia I see colors when I hear names and words. Since years I paint what I see, I paint names and inspirational words. Recently people were telling me that they feel an energy flow coming from my paintings. They even recognize themselves in the paintings. This is so fascinating.

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This entry was posted on January 15, 2013 by in Biology, Mind.
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