Implications of number-space synesthesia on the automaticity of numerical processing.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
Limor GertnerRoi Cohen Kadosh

Abstract

Number-space synesthetes visualize numbers in specific spatial configurations. Their spatial-numerical perceptions are assumed to be automatic in nature and have been found to affect performance in various numerical tasks. The current study tested whether synesthetic number-space associations can modulate the well-established Size Congruency Effect (SiCE), which is considered to be an indication for the automaticity of numerical processing. Two groups, number-space synesthetes and matched controls, were tested on a numerical Stroop task (Henik and Tzelgov, 1982). In separate blocks, participants were presented with two digits and asked to make comparative judgments regarding either numerical values (numerical comparison) or physical size (physical comparison). Both dimensions were manipulated orthogonally, creating three congruency levels: congruent (e.g., 2 7), incongruent (e.g., 2 7) and neutral (e.g., 2 2 and 2 7 for physical and numerical blocks, respectively). For the numerical block, both synesthetes and controls showed the classic SiCE, indicating similar automatic processing of physical magnitude. However, in the physical block, synesthetes showed a lack of automatic numerical magnitude processing when the numbers to be...Continue Reading

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Citations

Sep 15, 2015·Neuroscience and Biobehavioral Reviews·Bodo WinterMartin H Fischer
Oct 11, 2014·Cognitive Neuropsychology·Joanna HaleRoi Cohen Kadosh
Sep 14, 2019·Consciousness and Cognition·Elizabeth Y ToomarianEdward M Hubbard

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Methods Mentioned

BETA
SiCE
the
numerical

Software Mentioned

Compaq

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