The effects of optical illusions in perception and action in peripersonal and extrapersonal space

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

While the two visual system hypothesis tells a fairly compelling story about perception and action in peripersonal space (i.e., within arm's reach), its validity for extrapersonal space is very limited and highly controversial. Hence, the present purpose was to assess whether perception and action differences in peripersonal space hold in extrapersonal space and are modulated by the same factors. To this end, the effects of an optic illusion in perception and action in both peripersonal and extrapersonal space were compared in three groups that threw balls toward a target at a distance under different target eccentricity (i.e., with the target fixated and in peripheral field), viewing (i.e., binocular and monocular viewing), and delay conditions (i.e., immediate and delayed action). The illusory bias was smaller in action than in perception in peripersonal space, but this difference was significantly reduced in extrapersonal space, primarily because of a weakening bias in perception. No systematic modulation of target eccentricity, viewing, and delay arose. The findings suggest that the two visual system hypothesis is also valid for extra personal space
Original languageEnglish
Pages (from-to)1118-1126
Number of pages9
JournalPerception
Volume46
Issue number9
DOIs
Publication statusPublished - Sep 2017

Keywords

  • Binocular vision
  • Perception
  • Spatial vision
  • perception or action

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