September 2005
Volume 5, Issue 8
Vision Sciences Society Annual Meeting Abstract  |   September 2005
Temporal dynamics of bistability in motion transparency
Author Affiliations
  • Katherine McArthur
    University of Glasgow, Glasgow, UK
  • Pascal Mamassian
    University of Glasgow, Glasgow, UK, and CNRS, Université Paris 5, France
Journal of Vision September 2005, Vol.5, 701. doi:10.1167/5.8.701
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Katherine McArthur, Pascal Mamassian; Temporal dynamics of bistability in motion transparency. Journal of Vision 2005;5(8):701. doi: 10.1167/5.8.701.

      Download citation file:

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

  • Supplements

Perceptual reversals occur when a given stimulus is consistent with more than one possible percept. When viewing motion transparent stimuli, observers experience reversals in depth. We are interested in the dynamics of these reversals, and particularly the role of segregation processes in determining biases and reversal rates. Random-dot kinematograms were generated and presented as two distinct surfaces moving at the same speed in opposite horizontal directions. We designed an experiment with two conditions varying the ease of segregation. In the first condition both surfaces were composed of only black dots, while in the other condition the two surfaces were distinguished using black and white dots. Critically, motion is necessary to perceive two surfaces in the same contrast condition since no other segregation cues are available. The task of the observers was to report the trajectory of the surface that appeared in front, by responding either left or right every two seconds. Consistent with previous studies (Mamassian and Wallace, VSS '03), directional biases varied across participants. In spite of these idiosyncrasies, the initial bias was stronger when the two surfaces had the same contrast. Observers were, however, more likely to experience depth reversals when the two surfaces had the same contrast. These results suggest that the role of segregation cues changes throughout a trial: segregation cues appear to accentuate directional biases initially, but then facilitate perceptual reversals.

McArthur, K. Mamassian, P. (2005). Temporal dynamics of bistability in motion transparency [Abstract]. Journal of Vision, 5(8):701, 701a,, doi:10.1167/5.8.701. [CrossRef]

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.