August 2014
Volume 14, Issue 10
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2014
Body and objects representations are associated with similar distortions
Author Affiliations
  • Aurelie Saulton
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
  • Trevor Dodds
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
  • Heinrich Buelthoff
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
  • Stephan de la Rosa
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
Journal of Vision August 2014, Vol.14, 845. doi:10.1167/14.10.845
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Aurelie Saulton, Trevor Dodds, Heinrich Buelthoff, Stephan de la Rosa; Body and objects representations are associated with similar distortions. Journal of Vision 2014;14(10):845. doi: 10.1167/14.10.845.

      Download citation file:


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

      ×
  • Supplements
Abstract

Stored representations of body size and shape as derived from somatosensation (body model) are considered to be critical components of perception and action. It is commonly believed that the body model can be measured using a localization task and be distinguished from other visual representations of the body using a visual template matching task. Specifically, localization tasks have shown distorted hand representations consisting of an overestimation of hand width and an underestimation of finger length [Longo and Haggard, 2010, PNAS,107 (26), 11727-11732]. In contrast, template matching tasks indicate that visual hand representations (body image) do not show such distortions [Longo and Haggard, 2012, Acta Psychologica, 141, 164-168]. We examined the specificity of the localization and visual template matching tasks to measure body related representations. Participants conducted a localization and template matching task with objects (box, post-it, rake) and their own hand. The localization task revealed that all items' dimensions were significantly distorted (all p <.0018) except for the width of the hand and rake. In contrast, the template matching task indicated no significant differences between the estimated and actual item's shape for all items (all p>0.05) except for the box (p<0.01) suggesting that the visual representation of items is almost veridical. Moreover, the performance across these tasks was significantly correlated for the hand and rake (p<.001). Overall, these results show that effects considered to be body-specific, i.e. distortions of the body model, are actually more general than previously thought as they are also observed with objects. Because localizing points on an object is unlikely to be aided by somatosensation, the assessed representations are unlikely to be mainly based on somatosensation but might reflect more general cognitive processes e.g. visual memory. These findings have important implications for the nature of the body image and the body model.

Meeting abstract presented at VSS 2014

×
×

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.

×