August 2012
Volume 12, Issue 9
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2012
Contrast adaptation can make test items invisible
Author Affiliations
  • Stuart Anstis
    Dept of Psychology, UC San DIego
Journal of Vision August 2012, Vol.12, 111. doi:10.1167/12.9.111
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      Stuart Anstis; Contrast adaptation can make test items invisible. Journal of Vision 2012;12(9):111. doi: 10.1167/12.9.111.

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

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Abstract

Adaptation to time-varying contrast reduces the visibility of subsequently viewed grey test items (Webster & Mollon, JOSA A 1993, 10, 1332-40). We adapted to a contour-rich "#" pattern and tested on congruent patterns of different contrasts, using a constant-stimuli matching method. Results were linear: All test contrasts were uniformly reduced subjectively to 60% of their physical value. Adapting to a non-congruent, slightly larger square patch covering the same area had less effect, showing the importance of contours. Adaptation to a high-contrast photograph that alternated (flickered) between positive and negative reduced the visibility of low-contrast test photos of the same person, whether these were positive or negative.

Meeting abstract presented at VSS 2012

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