September 2005
Volume 5, Issue 8
Free
Vision Sciences Society Annual Meeting Abstract  |   September 2005
Metacontrast and binocular rivalry suppression reveal hierarchies of unconscious visual processing
Author Affiliations
  • Bruno G. Breitmeyer
    Department of Psychology, University of Houston, Houston TX 77204-5022, and Center for Neuro-Engineering and Cognitive Sciences, University of Houston, Houston TX 77204-4005
  • Haluk Ogmen
    Department of Electrical & Computer Engineering, University of Houston, Houston TX 77204-4005, and Center for Neuro-Engineering and Cognitive Sciences, University of Houston, Houston TX 77204-4005
  • Alpay Koc
    Department of Electrical & Computer Engineering, University of Houston, Houston TX 77204-4005
Journal of Vision September 2005, Vol.5, 8. doi:10.1167/5.8.8
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Bruno G. Breitmeyer, Haluk Ogmen, Alpay Koc; Metacontrast and binocular rivalry suppression reveal hierarchies of unconscious visual processing. Journal of Vision 2005;5(8):8. doi: 10.1167/5.8.8.

      Download citation file:


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

      ×
  • Supplements
Abstract

Using metacontrast, we looked at target suppression and target recovery under binocular and dichoptic viewing of stimuli, with the ability to additionally introduce binocularly rivalry suppression in the latter viewing condition. Our investigations revealed the following functional hierarchy of unconsciously processing of visual stimuli: 1) Studies of masked priming showed that a target form can be processed unconsciously at levels that already have extracted, at minimum, conjunctions of primitive orientation features such as corners and vertices. 2) Studies of target recovery, produced by using a secondary mask to weaken the masking effect of the primary mask, showed that recovery is absent or greatly reduced under dichoptic presentation of the two masks, indicating that target recovery occurs primarily at unconscious levels prior to cortical binocular activation. 3) Studies of target recovery, produced by binocular rivalry suppression of the mask, showed that the cortical mechanism responsible for metacontrast suppression, itself activated at unconscious levels of cortical processing, occurs after the cortical level of binocularly rivalry suppression. Besides allowing us to establish functional hierarchies of unconscious processing in the cortical visual system, these results also allow us to distinguish between current models of target masking and recovery.

Breitmeyer, B. G. Ogmen, H. Koc, A. (2005). Metacontrast and binocular rivalry suppression reveal hierarchies of unconscious visual processing [Abstract]. Journal of Vision, 5(8):8, 8a, http://journalofvision.org/5/8/8/, doi:10.1167/5.8.8. [CrossRef]
Footnotes
 Supported by NSF grant BCS-0114533 and NIH grant R01-MH49892.
×
×

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.

×