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Synaesthesia for Finger Counting and Dice Patterns: A Case of Higher Synaesthesia?
Synaesthesia is often triggered by numbers, although it is conceivable that different aspects of numerical representation are responsible for different variants of synaesthesia. For individuals with "higher synaesthesia" it is assumed that number meaning ( or numerosity) is responsible for the elicitation of synaesthetic experiences. This study documents a case study of a synaesthete, TD, who broadly fits this profile. TD reports that the same colours are elicited from physically different representations of number ( digits, dice patterns and finger counting) provided that they share the same numerosity. The authenticity of his synaesthesia is established using Stroop-like priming and interference paradigms. Not only does synaesthetic colour interfere with veridical colour judgements, but also veridical colours can interfere with numerosity judgments. This suggests a close bi-directional coupling between numerosity and colour. Together, these findings constrain theories concerning the neural basis of synaesthesia.
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Publication status
- Published
Journal
NeurocaseISSN
1355-4794Publisher
Taylor & FrancisExternal DOI
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2Volume
13Department affiliated with
- Psychology Publications
Full text available
- No
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- Yes
Legacy Posted Date
2012-02-06Usage metrics
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