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    Naso-temporal ERP differences: evidence for increased inhibition of temporal distractors

    Huber-Huber, C. and Grubert, Anna and Ansorge, U. and Eimer, Martin (2015) Naso-temporal ERP differences: evidence for increased inhibition of temporal distractors. Journal of Neurophysiology 113 (7), pp. 2210-2219. ISSN 0022-3077.

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    Previous research has demonstrated behavioral advantages for stimuli in the temporal relative to the nasal visual hemifield. To investigate whether this naso-temporal asymmetry reflects a genuinely attentional bias, we recorded event-related potentials (ERPs) in a task where participants identified a color-defined target digit in one visual hemifield that was accompanied by an irrelevant distractor in the opposite hemifield. To dissociate the processing of stimuli in the nasal and temporal visual hemifields, an eye patching procedure was employed. Targets triggered N2pc components that marked their attentional selection. Unexpectedly, these N2pc components were larger and emerged earlier for nasal relative to temporal targets. Experiment 2 provided evidence that this naso-temporal asymmetry for the N2pc is linked to an increased attentional inhibition of temporal distractors. Relative to nasal distractors, temporal distractors elicited an increased inhibition-related contralateral positivity (PD component), resulting in more pronounced differences between contralateral and ipsilateral ERPs on trials with temporal distractors and nasal targets. These results provide novel evidence for a genuinely attentional contribution to naso-temporal asymmetries, and suggest that such asymmetries are associated with top-down controlled distractor inhibition.


    Item Type: Article
    School: Birkbeck Faculties and Schools > Faculty of Science > School of Psychological Sciences
    Depositing User: Administrator
    Date Deposited: 20 Jan 2015 10:28
    Last Modified: 02 Aug 2023 17:14


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