Arithmetic mismatch negativity and numerical magnitude processing in number matching.

Abstract:

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.

journal_name

BMC Neurosci

journal_title

BMC neuroscience

authors

Hsu YF,Szücs D

doi

10.1186/1471-2202-12-83

subject

Has Abstract

pub_date

2011-08-11 00:00:00

pages

83

issn

1471-2202

pii

1471-2202-12-83

journal_volume

12

pub_type

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