May 2008
Volume 8, Issue 6
Free
Vision Sciences Society Annual Meeting Abstract  |   May 2008
Influences of abrupt vs. ramped stimulus presentation on location-based inhibition of return
Author Affiliations
  • Benjamin Guenther
    Department of Psychology, The University of Georgia
  • James Brown
    Department of Psychology, The University of Georgia
Journal of Vision May 2008, Vol.8, 1111. doi:10.1167/8.6.1111
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Benjamin Guenther, James Brown; Influences of abrupt vs. ramped stimulus presentation on location-based inhibition of return. Journal of Vision 2008;8(6):1111. doi: 10.1167/8.6.1111.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose: Previous research by Guenther & Brown (VSS 2007) manipulated the relative balance of P and M activity finding relatively greater P activity to be associated with increased IOR and relatively greater M activity to be associated with decreased IOR. To further examine the roles of the P and M pathways in location-based IOR, the present research employed abrupt versus ramped stimulus presentations to manipulate the relative balance of P and M activity. It was predicted that since ramped stimuli would be processed less efficiently by the M system, ramped and abrupt stimuli would represent conditions of relatively less M (i.e., greater P) and relatively greater M activity respectively. Method: Cue and target onsets and offsets were either abrupt or ramped. They were presented either alone, in 2-D, or in 3-D objects, using timing parameters known to produce location-based IOR. Simple RT to target onset was measured. Results: Ramping had the expected sensory effects of reducing the M response as indicated by the increased RTs to ramped compared to abrupt targets. Direct RT comparisons of abrupt and ramped conditions were validated through a control experiment. Without objects, ramped and abrupt conditions produced similar IOR. With both 2-D and 3-D objects, IOR differences emerged with greater IOR to the relatively more P based, ramped condition and less IOR to the relatively more M based, abrupt condition. Conclusions: While SF appears to be a better way to produce P and M based differences in IOR (Guenther & Brown, VSS 2007), the interaction of abrupt vs. ramped presentation conditions with 2-D and 3-D objects supports the association of relatively greater P/ventral activity with increased IOR.

Guenther, B. Brown, J. (2008). Influences of abrupt vs. ramped stimulus presentation on location-based inhibition of return [Abstract]. Journal of Vision, 8(6):1111, 1111a, http://journalofvision.org/8/6/1111/, doi:10.1167/8.6.1111.
×
×

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.

×