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Related Experiment Videos

Coloured speech perception: is synaesthesia what happens when modularity breaks down?

S Baron-Cohen1, J Harrison, L H Goldstein

  • 1Department of Psychology, Institute of Psychiatry, University of London, UK.

Perception
|January 1, 1993
PubMed
Summary

This study confirms colored hearing synaesthesia is genuine and consistent over time. All nine subjects exhibited chromatic-graphemic (CG) synaesthesia, not chromatic-lexical (CL) or chromatic-phonemic (CP) types.

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Area of Science:

  • Neuroscience
  • Psychology
  • Sensory Perception

Background:

  • Previous evidence suggested chromatic-lexical (CL) synaesthesia is a genuine phenomenon.
  • Synaesthesia involves experiencing sensations in a different sensory modality or cognitive pathway.

Purpose of the Study:

  • To investigate the genuineness and characteristics of colored hearing synaesthesia.
  • To determine if subjects exhibited CL, chromatic-graphemic (CG), or chromatic-phonemic (CP) synaesthesia.
  • To explore commonalities and phenomenological aspects of colored hearing.

Main Methods:

  • Nine subjects with colored hearing were tested on their color associations with 130 words, phrases, and letters.
  • Subjects were retested after more than one year to assess consistency.

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  • A control group (n=9) was tested and retested within a week to compare response reliability.

    • Main Results:

    • Experimental group responses were 92.3% consistent upon retesting after one year, confirming genuineness.
    • All nine subjects displayed CG synaesthesia; none showed CL or CP synaesthesia.
    • Consistency in colors evoked by specific letters suggests a neurological basis.

    Conclusions:

    • Colored hearing synaesthesia is a genuine and consistent condition.
    • The synaesthesia observed in this study was primarily chromatic-graphemic (CG), not chromatic-lexical (CL) or chromatic-phonemic (CP).
    • Findings suggest a neurological basis for synesthetic experiences in colored hearing.