October 2003
Volume 3, Issue 9
Free
Vision Sciences Society Annual Meeting Abstract  |   October 2003
Non-accidental properties and change detection
Author Affiliations
  • Elan B Barenholtz
    Rutgers University/New Brunswick, USA
Journal of Vision October 2003, Vol.3, 760. doi:10.1167/3.9.760
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      Elan B Barenholtz, Elias Cohen, Jacob Feldman, Manish Singh; Non-accidental properties and change detection. Journal of Vision 2003;3(9):760. doi: 10.1167/3.9.760.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Abstract: While the mapping from a distal stimulus to a retinal image is generally many-to-one, non-accidental properties in the image can point to a unique distal structure (Witkin and Tannenbaum, 1983) . The disproportionate degree of information carried by these properties suggests that the visual system might be particularly attuned to detecting and representing them when they appear in an image. Using a change detection task we investigated people's ability to detect a change to a scene when it involved a non-accidental property as compared with a change that didn't, theorizing that changes to properties that are ‘important’ to the visual system would be detected more efficiently. Our stimuli were highly simple ‘scenes’ consisting of a few (generally two) oriented line segments. In each trial, a configuration of the lines would appear for a brief time , replaced by a mask, and then a second configuration (either identical or with some change) would appear; observers had to respond based on whether they had seen a change or not (2-way, forced choice). The types of changes that could take place were the same for all trials, either a rotation or translation, generally of only one of the lines; the critical manipulation was where the change resulted in either the introduction or elimination of a non-accidental property (e.g. a configuration of collinear lines followed by one where one of the lines is slightly rotated). We found that a number of non-accidental properties led to much greater sensitivities then changes of equal magnitude (or greater) that did not involve one of these properties, suggesting a critical role for these properties in the visual representation.

Citation: WitkinA.TenenbaumJ.M.(1983). On the role of structure in vision. In Human and Machine Vision, RosenfeldA. ed. Academic Press.

Barenholtz, E. B., Cohen, E., Feldman, J., Singh, M.(2003). Non-accidental properties and change detection [Abstract]. Journal of Vision, 3( 9): 760, 760a, http://journalofvision.org/3/9/760/, doi:10.1167/3.9.760. [CrossRef]
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