REAL

Asymmetry of automatic change detection shown by the visual mismatch negativity: An additional feature is identified faster than missing features

Czigler, István and Sulykos, István and Kecskés-Kovács, Krisztina (2014) Asymmetry of automatic change detection shown by the visual mismatch negativity: An additional feature is identified faster than missing features. COGNITIVE AFFECTIVE AND BEHAVIORAL NEUROSCIENCE, 14 (1). pp. 278-285. ISSN 1530-7026

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Abstract

In two experiments, we demonstrated that an asymmetric effect of the brain electric activity that is elicited by nonattended visual stimuli is similar to the one found in responses observed in the performance of visual search tasks. The automatic detection of violated sequential regularities was investigated by measuring the visual mismatch negativity (vMMN) component of event-related brain potentials (ERPs). In Experiment 1, within a sequence of stimulus displays with O characters, infrequently presented Q characters elicited an earlier vMMN than did infrequent O characters within a sequence of Q characters. In Experiment 2, similar asymmetric results emerged if only 16 % of the characters were different within an infrequent display. In both experiments, these stimuli were irrelevant; during the stimulus sequences, participants performed a demanding videogame. We suggest that the underlying match/mismatch and decision processes are similar in the vMMN and in the attention-related visual search paradigm, at least in the case of the stimuli in the present experiments.

Item Type: Article
Subjects: R Medicine / orvostudomány > RC Internal medicine / belgyógyászat > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry / idegkórtan, neurológia, pszichiátria
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 19 Dec 2014 13:25
Last Modified: 31 Dec 2015 00:15
URI: http://real.mtak.hu/id/eprint/19580

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