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Symbolic distance between numerosity and identity modulates Stroop-like interference

By Antonella Pavese and Carlo Umiltà


Thirty undergraduates participated in an experiment investigating the effect of the arithmetic difference between stimulus identity and stimulus numerosity in a numerical version of the Stroop task. It was found that digits symbolically close to the enumeration response reliably produced larger interference than digits that were farther from the enumeration response. This semantic distance effect (SDE) was found with different numerosities (1¸9) and different enumeration processes (counting and subitizing), and it increased as a function of numerosity in the subitizing range. These findings suggest that digit identity autonomously activates a magnitude representation organized as a compressed number line

Topics: Cognitive Psychology, Perceptual Cognitive Psychology, Psychophysics
Year: 1999
OAI identifier:

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