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Related Experiment Videos

Concept driven color experiences in digit-color synesthesia.

Daniel Smilek1, Mike J Dixon, Cera Cudahy

  • 1Department of Psychology, University of Waterloo, Ontario, Canada. dsmilek@watarts.uwaterloo.ca

Brain and Cognition
|May 28, 2002
PubMed
Summary

Digit-color synesthesia involves specific color experiences (photisms) for digits. This study shows that for synesthete C, activating a digit concept, even without a visual digit, is enough to trigger these color photisms.

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Digit-color synesthesia is a neurological phenomenon where individuals experience specific colors associated with black digits.
  • This study investigates the conditions under which these color experiences, known as photisms, are triggered in a synesthete.

Observation:

  • The research focused on an undergraduate student, C, who exhibits digit-color synesthesia.
  • The experiment assessed whether C's photisms could be elicited without the direct visual presentation of a digit.

Findings:

  • Participants were presented with arithmetic problems followed by color patches.
  • C demonstrated significantly faster color naming when the patch color matched the photism of the arithmetic problem's answer.
  • This indicates that the mere activation of a digit concept, not just a visual stimulus, can suffice to trigger a photism.

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Implications:

  • These findings suggest that internal conceptual representations can be sufficient to evoke synesthetic experiences.
  • This challenges the necessity of external sensory input for triggering photisms in some synesthetes.
  • The results contribute to understanding the cognitive mechanisms underlying synesthesia.