BIROn - Birkbeck Institutional Research Online

    Visual search for singleton targets redundantly defined in two feature dimensions: coactive processing of color-motion targets?

    Krummenacher, J. and Muller, Hermann J. (2014) Visual search for singleton targets redundantly defined in two feature dimensions: coactive processing of color-motion targets? Journal of Experimental Psychology: Human Perception and Performance 40 (5), pp. 1926-1939. ISSN 0096-1523.

    Full text not available from this repository.

    Abstract

    In 2 visual search experiments, the role of feature contrast/saliency signals in generating detection responses to singleton feature targets in visual search was investigated using the redundant-target paradigm. Experiment 1 showed that coactive integration of dimensional signals is not restricted to targets defined on the color and orientation dimensions; rather, targets involving any of the combinations of color, orientation, and motion, are integrated coactively, as evidenced by violations of Miller’s (1982) race model inequality. Experiment 2 replicated the findings of Experiment 1 for color-motion targets, with the target items’ luminance adjusted, individually for each observer, to that of the distractors. The evidence for coactive processing of motion (saliency) with color and, respectively, orientation (saliency) signals suggests that, at variance with a recent suggestion by Li (2002; Koene & Zhaoping, 2007), signal integration in feature search tasks occurs at a stage following initial feature coding in primary visual cortex (V1), even though feature contrast computations in V1 may well contribute to saliency coding. In sum, the results suggest that detection responses were based on an integrated, overall-saliency representation indicating the presence of an odd-one-out item in the display, consistent with the dimension-weighting account of visual search (Müller et al., 1995, 2003).

    Metadata

    Item Type: Article
    School: Birkbeck Schools and Departments > School of Science > Psychological Sciences
    Depositing User: Sarah Hall
    Date Deposited: 22 Oct 2015 11:36
    Last Modified: 22 Oct 2015 11:36
    URI: http://eprints.bbk.ac.uk/id/eprint/13157

    Statistics

    Downloads
    Activity Overview
    0Downloads
    110Hits

    Additional statistics are available via IRStats2.

    Archive Staff Only (login required)

    Edit/View Item Edit/View Item