August 2010
Volume 10, Issue 7
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2010
Event-related potential evidence for a dual-locus model of global/local processing
Author Affiliations
  • Kirsten Dalrymple
    Department of Psychology, University of British Columbia
  • Alan Kingstone
    Department of Psychology, University of British Columbia
  • Todd Handy
    Department of Psychology, University of British Columbia
Journal of Vision August 2010, Vol.10, 91. doi:10.1167/10.7.91
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Kirsten Dalrymple, Alan Kingstone, Todd Handy; Event-related potential evidence for a dual-locus model of global/local processing. Journal of Vision 2010;10(7):91. doi: 10.1167/10.7.91.

      Download citation file:


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

      ×
  • Supplements
Abstract

We investigated the perceptual time-course of global/local processing using event-related potentials (ERPs). Subjects discriminated the global or local level of hierarchical letters of different sizes and densities. Subjects were faster to discriminate the local level of large/sparse letters, and the global level of small/dense letters. This was mirrored in early ERP components: the N1/N2 had smaller peak amplitudes when subjects made discriminations at the level that took precedence. Only global discriminations for large/sparse letters led to amplitude enhancement of the later P3 component, suggesting that additional attention-demanding processes are involved in discriminating the global level of these stimuli. Our findings suggest a dual-locus time course for global/local processing: 1) level precedence occurs early in visual processing; 2) extra processing is required at a later stage, but only for global discriminations of large, sparse, stimuli, which may require additional attentional resources for active grouping.

Dalrymple, K. Kingstone, A. Handy, T. (2010). Event-related potential evidence for a dual-locus model of global/local processing [Abstract]. Journal of Vision, 10(7):91, 91a, http://www.journalofvision.org/content/10/7/91, doi:10.1167/10.7.91. [CrossRef]
Footnotes
 NSERC, SSHRC, CIHR, MSFHR.
×
×

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.

×