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    Invariant spatial context is learned but not retrieved in gaze-contingent tunnel-view search.

    Zang, X. and Jia, L. and Muller, Hermann J. and Shi, Z. (2015) Invariant spatial context is learned but not retrieved in gaze-contingent tunnel-view search. Journal of Experimental Psychology: Learning, Memory, and Cognition 41 (3), pp. 807-819. ISSN 0278-7393.

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    Abstract

    Our visual brain is remarkable in extracting invariant properties from the noisy environment, guiding selection of where to look and what to identify. However, how the brain achieves this is still poorly understood. Here we explore interactions of local context and global structure in the long-term learning and retrieval of invariant display properties. Participants searched for a target among distractors, without knowing that some “old” configurations were presented repeatedly (randomly inserted among “new” configurations). We simulated tunnel vision, limiting the visible region around fixation. Robust facilitation of performance for old versus new contexts was observed when the visible region was large but not when it was small. However, once the display was made fully visible during the subsequent transfer phase, facilitation did become manifest. Furthermore, when participants were given a brief preview of the total display layout prior to tunnel view search with 2 items visible, facilitation was already obtained during the learning phase. The eye movement results revealed contextual facilitation to be coupled with changes of saccadic planning, characterized by slightly extended gaze durations but a reduced number of fixations and shortened scan paths for old displays. Taken together, our findings show that invariant spatial display properties can be acquired based on scarce, para-/foveal information, while their effective retrieval for search guidance requires the availability (even if brief) of a certain extent of peripheral information.

    Metadata

    Item Type: Article
    School: Birkbeck Schools and Departments > School of Science > Psychological Sciences
    Depositing User: Administrator
    Date Deposited: 05 Jul 2016 13:14
    Last Modified: 19 Jun 2017 15:27
    URI: http://eprints.bbk.ac.uk/id/eprint/15699

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