Illusory scene distortion occurs during perceived self-rotation in roll

Area of Science:

• Visual perception
• Human psychophysics
• Neuroscience of vision

Background:

• The visual system typically provides a stable perception of the environment despite observer motion.
• Illusory distortions can arise from complex interactions between motion perception and visual processing.

Purpose of the Study:

• To investigate a novel illusory distortion of the visual scene.
• To identify the conditions under which this visual distortion occurs and its underlying mechanisms.

Main Methods:

• Experiments involved observer rotation in a stationary room and room rotation around a stationary observer.
• Systematic elimination of potential confounding factors including eye movements, distance misperception, and adaptation.

Main Results:

• A consistent illusory distortion was observed where scenery near fixation led or lagged peripheral scenery.
• This distortion was specifically linked to the perception of self-tilt (real or illusory) during stable visual fixation.

Conclusions:

• The findings suggest a specific mechanism in visual processing that links perceived self-motion and visual scene stability.
• This research advances understanding of how the brain integrates vestibular and visual information to maintain spatial orientation and visual perception.