August 2009
Volume 9, Issue 8
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2009
Non-retinotopic visual search
Author Affiliations
  • Marco Boi
    Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
  • Haluk Ogmen
    Center for Neuro-Engineering and Cognitive Science, University of Houston, Houston, Texas, USA, and Department of Electrical & Computer Engineering, University of Houston, Houston, Texas, USA
  • Krummenacher Joseph
    Department of Psychology, University of Fribourg, Switzerland
  • Michael Herzog
    Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
Journal of Vision August 2009, Vol.9, 1173. doi:10.1167/9.8.1173
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      Marco Boi, Haluk Ogmen, Krummenacher Joseph, Michael Herzog; Non-retinotopic visual search. Journal of Vision 2009;9(8):1173. doi: 10.1167/9.8.1173.

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Abstract

At the heart of feature integration theory there is a master map that operates on the various features maps. Explicitly or implicitly, it is assumed that these feature maps are organized retinotopically. If in conjunction search, for example, a horizontal green line must be found, the master map would look at the retinotopic position (x,y) in both the colour and the orientation maps to determine whether there is a “green” and a “horizontal” entry, respectively. Here, using a Ternus-Pikler display, we provide evidence that the master map operates on non retinotopic feature maps. We presented a typical Ternus-Pikler display where three squares appeared to move back and forth (group motion). Each square contained a different conjunction search display. The task of the observers was to search for a green horizontal line in the central square only. Retinotopically organized feature maps predict poor search performance because the central display changed position from frame to frame. In contrast to this expectation, we found a remarkably strong performance. Perceptually, only one central square with one search display was perceived for which search is easy. This indicates that efficient search results from the ability to integrate non-retinotopically across the two positions of the central square.

Boi, M. Ogmen, H. Joseph, K. Herzog, M. (2009). Non-retinotopic visual search [Abstract]. Journal of Vision, 9(8):1173, 1173a, http://journalofvision.org/9/8/1173/, doi:10.1167/9.8.1173. [CrossRef]
Footnotes
 This research was supported by the Pro*Doc
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