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Visual illusion in virtual world alters women's target-directed walking
Sidhartha Chaudhury1, Jane M Eisinger, Lei Hao
1Lions Vision Center, Wilmer Eye Institute, The Johns Hopkins University, 550 North Broadway, 6th Floor, Baltimore, MD 21205, USA.
Experimental Brain Research
|July 10, 2004
Summary
A visual illusion in far space significantly alters walking paths, especially for women, demonstrating that actions in distant space are susceptible to visual distortions. This contrasts with findings for near-space actions.
Area of Science:
- Visual perception
- Human locomotion
- Virtual reality
Background:
- Visual illusions can distort spatial perception.
- The induced Roelofs effect is known to alter perceived target location.
- Previous research suggests near-space actions are resistant to such illusions.
Purpose of the Study:
- To investigate if a visual illusion in far space affects open-loop walking paths.
- To compare the impact of the induced Roelofs effect on perception versus action.
- To explore potential gender differences in response to visual illusions during locomotion.
Main Methods:
- Utilized immersive virtual reality (VR) to create a visual illusion (induced Roelofs effect).
- Subjects performed perception tasks (reporting target location) and action tasks (walking to target).
- Measured deviations in walking paths and reported target positions.
Main Results:
- The visual illusion altered perceived target locations for most subjects.
- Walking paths were significantly affected by the illusion, particularly in women.
- Women's paths deviated by 7.1 degrees on average, while men's deviated by 2.0 degrees.
Conclusions:
- Action tasks in far space are susceptible to visual illusions.
- Visual illusions impact far-space walking paths differently than near-space actions.
- Significant gender differences suggest distinct strategies or mechanisms in visually guided far-space tasks.