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    Saliency maps for finding changes in visual scenes?

    Liesefeld, H.R. and Liesefeld, A.M. and Muller, Hermann 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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    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.


    Item Type: Article
    Keyword(s) / Subject(s): Co-activation, Intertrial-sequence effects, Priority map, Race-model inequality (RMI), Visual short-term memory
    School: School of Science > Psychological Sciences
    Depositing User: Hermann Muller
    Date Deposited: 22 May 2019 15:58
    Last Modified: 12 Feb 2021 04:43


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