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Occupational Therapy Insights

Jul 31, 2019

Synaesthesia, a neurological condition affecting approximately .05% of the population, is characterised by anomalous sensory perception: a stimulus in one sensory modality triggers an automatic, instantaneous, consistent response in another modality (e.g., sound evokes colour) or in a different aspect of the same modality (e.g., black text evokes colour). As evidence was limited to case studies based on self-report, the existence of synaesthesia was regarded with scepticism until the development of the Test of Genuineness (TOG) in 1987, which measures the consistency of stimulus-response linkage: synaesthetes typically score between 70-90% range, whereas controls typically score between 20-38%.


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