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    Saliency maps for finding changes in visual scenes?

    Liesefeld, H.R. and Liesefeld, A.M. and Muller, Hermann J. and Rangelov, D. (2017) Saliency maps for finding changes in visual scenes? Attention, Perception, & Psychophysics 79 (7), pp. 2190-2201. ISSN 1943-3921.

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    Abstract

    Sudden changes in the environment reliably summon attention. This rapid change detection appears to operate in a similar fashion as pop-out in visual search, the phenomenon that very salient stimuli are directly attended, independently of the number of distracting objects. Pop-out is usually explained by the workings of saliency maps, i.e., map-like representations that code for the conspicuity at each location of the visual field. While past research emphasized similarities between pop-out search and change detection, our study highlights differences between the saliency computations in the two tasks: in contrast to pop-out search, saliency computation in change detection (i) operates independently across different stimulus properties (e.g., color and orientation), and (ii) is little influenced by trial history. These deviations from pop-out search are not due to idiosyncrasies of the stimuli or task design, as evidenced by a replication of standard findings in a comparable visual-search design. To explain these results, we outline a model of change detection involving the computation of feature-difference maps, which explains the known similarities and differences with visual search.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): Visual short-term memory, Race-model inequality (RMI), Priority map, Co-activation, Intertrial-sequence effects
    School: Birkbeck Schools and Departments > School of Science > Psychological Sciences
    Depositing User: Administrator
    Date Deposited: 18 Aug 2017 09:13
    Last Modified: 08 Mar 2018 09:22
    URI: http://eprints.bbk.ac.uk/id/eprint/19434

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