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- Title
The Involvement of the Inferior Parietal Cortex in the Numerical Stroop Effect and the Distance Effect in a Two-digit Number Comparison Task.
- Authors
Xun Liu; Hongbin Wang; Corbly, Christine R.; Jiajie Zhang; Joseph, Jane E.
- Abstract
The neural mechanism of number representation and processing is currently under extensive investigation. In this functional magnetic resonance imaging study, we designed a number comparison task to examine how people represent and compare two-digit numbers in the brain, and whether they process the decade and unit digits in parallel. We manipulated the decade-unit-digit congruency and numerical distance between the pairs of numbers. We observed both Stroop-like interference and the distance effect in the participants performance. People responded more slowly to incongruent pairs of numbers and pairs of a smaller distance. The inferior parietal cortex showed common and distinct patterns of activation for both attentional selection and number comparison processes, and its activity was modulated by the Stroop-like interference effect and the distance effect. Taken together, these results support both parallel and holistic comparison of two-digit numbers in the brain.
- Subjects
COMPARISON (Psychology); PARIETAL lobe; ATTENTION; MAGNETIC resonance imaging; NEUROPSYCHOLOGY
- Publication
Journal of Cognitive Neuroscience, 2006, Vol 18, Issue 9, p1518
- ISSN
0898-929X
- Publication type
Article
- DOI
10.1162/jocn.2006.18.9.1518