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    Visual search is postponed during the period of the AB: an event-related potential study

    Lagroix, H.E.P. and Grubert, A. and Spalek, T.M. and Di Lollo, V. and Eimer, Martin (2015) Visual search is postponed during the period of the AB: an event-related potential study. Psychophysiology , ISSN 1469-8986.

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    Abstract

    In the phenomenon known as the attentional blink (AB), perception of the second of two rapidly sequential targets (T2) is impaired when presented shortly after the first (T1). Studies in which T2 consisted of a pop-out search array provided evidence suggesting that visual search is postponed during the AB. In the present work, we used behavioral and electrophysiological measures to test this postponement hypothesis. The behavioral measure was reaction time (RT) to T2; the electrophysiological measure was the onset latency of an ERP index of attentional selection, known as the N2pc. Consistent with the postponement hypothesis, both measures were delayed during the AB. The delay in N2pc was substantially shorter than that in RT, pointing to multiple sources of delay in the chain of processing events, as distinct from the single source postulated in current theories of the AB. Finally, the finding that the N2pc was delayed during the AB strongly suggests that attention is involved in the processing of pop-out search arrays.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): cognition, sensation/perception, normal volunteers, EEG, attention
    School: Birkbeck Schools and Departments > School of Science > Psychological Sciences
    Depositing User: Sarah Hall
    Date Deposited: 19 May 2015 11:00
    Last Modified: 11 Oct 2016 12:00
    URI: http://eprints.bbk.ac.uk/id/eprint/12115

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