Arithmetic mismatch negativity and numerical magnitude processing in number matching.

Change log
Hsu, Yi-Fang 
Szücs, Dénes 

BACKGROUND: This study examined the relationship of the arithmetic mismatch negativity (AMN) and the semantic evaluation of numerical magnitude. The first question was whether the AMN was sensitive to the incongruity in numerical information per se, or rather, to the violation of strategic expectations. The second question was whether the numerical distance effect could appear independently of the AMN. Event-related potentials (ERPs) were recorded while participants decided whether two digits were matching or non-matching in terms of physical similarity. RESULTS: The AMN was enhanced in matching trials presented infrequently relative to non-matching trials presented frequently. The numerical distance effect was found over posterior sites during a 92 ms long interval (236-328 ms) but appeared independently of the AMN. CONCLUSIONS: It was not the incongruity in numerical information per se, but rather, the violation of strategic expectations that elicited the AMN. The numerical distance effect might only temporally coincide with the AMN and did not form an inherent part of it.

Adult, Brain, Brain Mapping, Cognition, Female, Humans, Male, Mathematics, Pattern Recognition, Visual, Reaction Time, Semantic Differential, Task Performance and Analysis
Journal Title
BMC Neurosci
Conference Name
Journal ISSN
Volume Title
Springer Science and Business Media LLC
Medical Research Council (G0900643)
Medical Research Council (G0001354)