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    Micropattern orientation and spatial localization.

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    Publication date
    2009-06-24T13:22:41Z
    Author
    Keeble, David R.T.
    Nishida, S.
    Keyword
    Human
    Perception
    Psychophysics
    Stimulus localization
    Spatial orientation
    Space perception
    Vision
    Experimental study
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    A current, popular, theory of spatial localization holds that the visual system represents the location of simple objects by a single positional tag, the accuracy of which is largely independent of the internal properties of the object. We have already presented evidence of the limitations of such a view (Keeble & Hess (1998). Vision Research, 38, 827-840) in that 3-micropattern alignment performance was found to be dependent on the orientation of the micropatterns. We tested whether this was caused by a local anisotropy in positional coding by conducting 3-micropattern bisection experiments with varying patch orientation. No corresponding effect of patch orientation was found, implying a difference in the mechanisms used for the two tasks. In a further experiment we show that alignment task performance is very similar to the otherwise identical 2-patch orientation discrimination task. We conclude that the 3-micropattern alignment task is mediated by orientational mechanisms. We therefore present a 2nd-order orientation model for 3-patch alignment.
    URI
    http://hdl.handle.net/10454/2847
    Version
    No full-text available in the repository
    Citation
    Keeble, D.R.T. and Nishida, S. (2001). Micropattern orientation and spatial localization. Vision Research. Vol. 41, No. 27, pp. 3719-3733.
    Link to publisher’s version
    http://dx.doi.org/10.1016/S0042-6989(01)00210-3
    Type
    Article
    Collections
    Life Sciences Publications

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