September 2019
Volume 19, Issue 10
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2019
How spatial coding is affected by mid-level visual object properties within and outside of peripersonal space.
Author Affiliations & Notes
  • Harun Karimpur
    Experimental Psychology, Justus Liebig University Giessen
  • Filipp Schmidt
    Experimental Psychology, Justus Liebig University Giessen
  • Katja Fiehler
    Experimental Psychology, Justus Liebig University Giessen
Journal of Vision September 2019, Vol.19, 218-219. doi:https://doi.org/10.1167/19.10.218d
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Harun Karimpur, Filipp Schmidt, Katja Fiehler; How spatial coding is affected by mid-level visual object properties within and outside of peripersonal space.. Journal of Vision 2019;19(10):218-219. doi: https://doi.org/10.1167/19.10.218d.

      Download citation file:


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

      ×
  • Supplements
Abstract

We show enhanced behavioral responses to objects in our immediate surround compared to objects outside of reach space. Backed up by many neurophysiological studies this finding established the concept of peripersonal space. Within peripersonal space, we spatially encode objects-for-action based on a combination of egocentric (object-to-self) and allocentric (object-to-object) information. However, it is not clear how the interaction between these reference frames is modulated by the affordance of an object and the distance to the observer. This is in line with the recently proposed action-field theory of peripersonal space. Rather to think of an in-or-out zone, the theory defines peripersonal space as a graded field reflecting the context-dependent relevance of our actions which either aim to avoid or approach objects. Here we tested the role of object-affordance in spatial coding for different distances by using a pointing task in virtual reality. We presented a target object surrounded by task-irrelevant landmarks within and outside the participant’s peripersonal space. After a brief mask and delay, the landmarks shortly reappeared without the target, either at the same position (baseline) or horizontally shifted. After their disappearance, participants were asked to point to the remembered target object within the empty scene. To manipulate the level of object-affordance, we varied mid-level visual object properties of shape and texture (spiky metallic versus soft rubber ball). We found that reaching endpoints deviated in the direction of landmark shifts suggesting the use of allocentric information. This effect was more strongly affected by mid-level visual object properties within compared to outside of peripersonal space. Our findings suggest that spatial coding in our immediate surround is modulated by object-affordance.

Acknowledgement: International Research Training Group IRTG 1901 “The Brain in Action” funded by the German Research Foundation (DFG), the Center for Mind, Brain and Behavior (CMBB), Collaborative Research Center SFB-TRR-135 “Cardinal Mechanisms of Perception” funded by the German Research Foundation (DFG) 
×
×

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.

×