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Related Experiment Videos

The Aubert-Fleischl paradox does appear in visually induced self-motion.

B de Graaf1, A H Wertheim, W Bles

  • 1TNO Institute for Perception, Soesterberg, The Netherlands.

Vision Research
|January 1, 1991
PubMed
Summary

Oculomotor activity influences perceived speed of circular vection. Stationary eyes led to faster vection compared to eye movements, potentially resolving literature discrepancies.

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Area of Science:

  • Neuroscience
  • Perception
  • Oculomotor function

Background:

  • Circular vection, the illusory sense of self-motion, is influenced by visual stimuli.
  • Oculomotor activity, including eye movements, may modulate vection perception.

Purpose of the Study:

  • To investigate the impact of oculomotor activity on the perceived speed of circular vection.
  • To determine if stationary gaze or optokinetic nystagmus affects vection speed differently.

Main Methods:

  • Subjects were exposed to a rotating visual stimulus within an optokinetic drum.
  • Vection speed was compared between conditions with a fixation point (stationary eyes) and without (allowing optokinetic nystagmus).
  • A control condition isolated the effects of fixed gaze versus optokinetic nystagmus.

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Main Results:

  • Circular vection speed increased significantly when subjects maintained stationary gaze compared to when optokinetic nystagmus occurred.
  • The control condition, measuring fixed gaze versus optokinetic nystagmus separately, did not yield significant differences.
  • These results suggest a specific interaction between oculomotor state and vection perception.

Conclusions:

  • Oculomotor activity, specifically the presence or absence of eye movements like optokinetic nystagmus, plays a role in modulating the speed of perceived circular vection.
  • The findings may reconcile conflicting results in previous research regarding vection.
  • Understanding oculomotor influences is crucial for models of visual-spatial perception.