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    An ERP study of sustained spatial attention to stimulus eccentricity

    Eimer, Martin (2000) An ERP study of sustained spatial attention to stimulus eccentricity. Biological Psychology 52 (3), pp. 205-220. ISSN 0301-0511.

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    Abstract

    Effects of attention on event-related brain potentials (ERPs) were measured when subjects kept sustained attention focused on ring-shaped regions of visual space to detect infrequently presented targets at a given eccentricity. In line with a previous study that employed a trial-by-trial cueing paradigm, no modulations of sensory-evoked P1 and N1 components were found. This suggests that attentional selectivity in complex spatial selection tasks is primarily located at post-perceptual processing levels. Enhanced negativities for attended as compared to unattended stimuli were present between 220 and 380 ms post-stimulus and were followed by an enlarged positivity for attended stimuli in the P3 time range. These effects reflected the distribution of attention in visual space, in part consistent with ‘attentional gradient’ and ‘zoom-lens’ models. However, ERPs also suggested the presence of selective mechanisms that exclude irrelevant stimuli located between two simultaneously attended areas.

    Metadata

    Item Type: Article
    School: School of Science > Psychological Sciences
    Depositing User: Sarah Hall
    Date Deposited: 10 Dec 2019 11:05
    Last Modified: 10 Dec 2019 11:05
    URI: https://eprints.bbk.ac.uk/id/eprint/30239

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