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Related Experiment Videos

Do reference surfaces influence exocentric pointing?

M J A Doumen1, A M L Kappers, J J Koenderink

  • 1Universiteit Utrecht, Helmholtz Instituut, Physics of Man, Utrecht, The Netherlands.

Acta Psychologica
|April 22, 2008
PubMed
Summary
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Visual scene elements influence egocentric distance perception. This study found poster-boards only affected exocentric direction perception when used as direct references for pointing tasks.

Area of Science:

  • Visual perception
  • Spatial cognition
  • Human-computer interaction

Background:

  • Egocentric distance perception is influenced by various visual scene elements.
  • The impact of scene elements on exocentric direction perception is less understood.

Purpose of the Study:

  • To investigate if visual scene elements, specifically poster-boards, influence exocentric direction perception.
  • To determine the conditions under which poster-boards affect exocentric direction estimation.

Main Methods:

  • An exocentric pointing task was employed.
  • Participants used a remote-controlled pointer to align with a target.
  • Poster-boards were strategically placed in the visual field to assess their influence.

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Main Results:

  • Poster-boards influenced exocentric direction perception.
  • This influence was contingent on the poster-boards serving as direct references for the pointing task.

Conclusions:

  • Visual scene context plays a role in exocentric direction perception, similar to egocentric distance.
  • The functional role of contextual elements as references is critical for their impact on spatial judgments.