August 2012
Volume 12, Issue 9
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2012
 Neural signature for the temporal dynamics of online visual object binding.
Author Affiliations
  • Roy Luria
    Tel-Aviv University
  • Edward Vogel
    University of Oregon
Journal of Vision August 2012, Vol.12, 1274. doi:10.1167/12.9.1274
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Roy Luria, Edward Vogel;  Neural signature for the temporal dynamics of online visual object binding.. Journal of Vision 2012;12(9):1274. doi: 10.1167/12.9.1274.

      Download citation file:


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

      ×
  • Supplements
Abstract

The binding mechanism evaluates incoming information and can integrate several features/objects into a single representation, update existing representations, or create novel object representations. Here, we evaluated the moment-by-moment operations of this mechanism by monitoring the contralateral-delay-activity (CDA, an ERP component indicative of the number of maintained objects). Participants performed the change-detection paradigm, in which colors moved for 1 sec before the retention interval. Motion cues were used in order to indicate either "objecthood" (i.e., 2 colors that moved together) or that the objects were separate (i.e., 2 colors that moved in different directions), creating 4 conditions: two separate objects, four separate objects, 2 color-color conjunction objects, and four separate colors that "met" and became 2 color-color conjunction objects. Across 3 experiments, the results indicated that the color-color conjunction objects were rapidly integrated into bound representations (so that their CDA amplitude was similar to that of two separate colors). In Experiment 1, colors in the "meeting" condition stayed stationary for 100 ms one on top of the other, and the results indicated that the binding mechanism did not integrate them (so that the CDA amplitude was similar to the condition with 4 separate colors), although perceptually these items were identical to the color-color conjunction objects that were integrated into bound representations. In Experiment 2, the meeting colors stayed stationary for 600 ms, one on top of the other after they met, and only high working memory (WM) individuals integrated the items. In Exp 3, the colors met and then moved together for 400 ms. The results indicated that this time, the four colors were integrated into two bound representations (regardless of WM capacity). This demonstrates that the binding mechanism is sensitive to both recency and primacy object information, and that high WM individuals are more likely to override primacy object information.

Meeting abstract presented at VSS 2012

×
×

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.

×