Inducing self-motion illusions referred as vection are critical for improving the sensation of walking in virtual environments (VE). Adding viewpoint oscillations to a constant forward velocity in VE is effective for improving vection strength under static conditions. However, the effects of oscillation frequency and amplitude on vection strength under treadmill walking conditions are still unclear. Besides, due to the visuomotor entrainment mechanism, these visual oscillations would affect gait patterns and be detrimental for achieving natural walking if not properly designed. This study was aimed at determining the optimal frequency and amplitude of vertical viewpoint oscillations for improving vection strength and reducing gait constraints. Seven subjects walked on a treadmill while watching a visual scene. The visual scene presented a constant forward velocity equal to the treadmill velocity with different vertical viewpoint oscillations added. Five oscillation patterns with different combinations of frequency and amplitude were tested. Subjects gave verbal ratings of vection strength. The mediolateral (M-L) center of pressure (CoP) complexity was calculated to indicate gait constraints. After the experiment, subjects were asked to give the best and the worst oscillation pattern based on their walking experience. The oscillation frequency and amplitude had strong positive correlations with vection strength. The M-L CoP complexity was reduced under oscillations with low frequency. The medium oscillation amplitude had greater M-L CoP complexity than the small and large amplitude. Besides, subjects preferred those oscillation patterns with large gait complexity. We suggested that the oscillation amplitude with largest M-L CoP complexity should first be chosen to reduce gait constraints. Then, increasing the oscillation frequency to improve vection strength until individual preference or the boundary of motion sickness. These findings provide important guidelines to promote the sensation of natural walking in VE.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8145014 | PMC |
| http://dx.doi.org/10.3390/e23050541 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Four-Stroke Apparent Motion Can Effectively Induce Visual Self-Motion Perception: an Examination Using Expanding, Rotating, and Translating Motion.
Multisens Res
April 2024
School of Psychology, Nihon Fukushi University, Mihama-cho, Okuda, Aichi, 470-3295 Japan.
Article Synopsis
- The study investigated if visual motion without actual displacement could create a sense of movement (vection) using a method called four-stroke apparent motions (4SAM).
- It found that 4SAM could induce self-motion perception in various directions, but this effect was weaker than that caused by real motion.
- The results imply that perceived motion energy alone can stimulate self-motion perception, yet actual displacement remains a key factor when both stimuli are presented together.
Beyond the Eye: Multisensory Contributions to the Sensation of Illusory Self-Motion (Vection).
Multisens Res
October 2023
KITE - Toronto Rehabilitation Institute, University Health Network, 550 University Avenue, Toronto, ON M5G 2A2, Canada.
Vection is typically defined as the embodied illusion of self-motion in the absence of real physical movement through space. Vection can occur in real-life situations (e.g.
View Article and Find Full Text PDFVR Sickness Adaptation With Ramped Optic Flow Transfers From Abstract To Realistic Environments.
Front Virtual Real
May 2022
Department of Psychology, University of Nevada, Reno, NV, United States.
VR sickness is a major concern for many users as VR continues its expansion towards widespread everyday use. VR sickness is thought to arise, at least in part, due to the user's intolerance of conflict between the visually simulated self-motion and actual physical movement. Many mitigation strategies involve consistently modifying the visual stimulus to reduce its impact on the user, but this individualized approach can have drawbacks in terms of complexity of implementation and non-uniformity of user experience.
View Article and Find Full Text PDFSomething in the Sway: Effects of the Shepard-Risset Glissando on Postural Activity and Vection.
Multisens Res
September 2022
School of Psychology, University of Wollongong, Wollongong, NSW 2522, Australia.
This study investigated claims of disrupted equilibrium when listening to the Shepard-Risset glissando (which creates an auditory illusion of perpetually ascending/descending pitch). During each trial, 23 participants stood quietly on a force plate for 90 s with their eyes either open or closed (30 s pre-sound, 30 s of sound and 30 s post-sound). Their centre of foot pressure (CoP) was continuously recorded during the trial and a verbal measure of illusory self-motion (i.
View Article and Find Full Text PDFEffects of luminance contrast, averaged luminance and spatial frequency on vection.
Exp Brain Res
December 2021
School of Psychology, University of Wollongong, Wollongong, NSW, 2522, Australia.
Changing the speed, size and material properties of optic flow can significantly alter the experience of vection (i.e. visually induced illusions of self-motion).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!