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Shinji Nakamura1

  • 1Inter-Departmental Education Centre, Nihon Fukushi University, Mihama, Japan.

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Summary
This summary is machine-generated.

Perceived rigidity of visual stimuli influences illusory self-motion (vection). Less rigid stimuli, like low-amplitude sine waves, weaken vection, while increased rigidity enhances it.

Keywords:
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Area of Science:

  • Neuroscience
  • Psychology
  • Perception

Background:

  • Illusory self-motion, known as vection, occurs when observers perceive body motion opposite to a uniformly moving visual stimulus.
  • The perceived rigidity of visual stimuli is a factor that may influence the strength of vection.

Purpose of the Study:

  • To investigate how the perceived rigidity of a visual stimulus affects the perception of self-motion (vection).
  • To determine if perceived features of a visual stimulus, beyond its physical motion, play a role in spatial orientation and self-motion perception.

Main Methods:

  • A horizontal sine wave-like line stimulus moving horizontally was used.
  • The amplitude of the sine wave was manipulated to alter perceived rigidity, with psychophysical experiments measuring vection strength.
  • Follow-up experiments introduced gaps into the sine waves to further manipulate perceived rigidity.

Main Results:

  • Lowering sine wave amplitude reduced perceived rigidity and weakened vection.
  • Perceived rigidity, not perceived speed, was correlated with vection strength.
  • Inserting gaps increased perceived rigidity and restored strong self-motion perception, even at lower amplitudes.

Conclusions:

  • Perceived features of visual stimuli are crucial for self-motion perception, alongside physical attributes.
  • More rigid visual stimuli provide a more reliable spatial reference, enhancing self-motion perception.
  • This research highlights the importance of perceived stimulus properties in understanding visual self-motion.