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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

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A virtual reality study investigating the train illusion.

Lars Kooijman¹, Houshyar Asadi¹, Shady Mohamed¹

¹Institute for Intelligent Systems Research and Innovation, Deakin University, Geelong, Victoria, Australia.

Royal Society Open Science

|April 17, 2023

Summary

This summary is machine-generated.

In virtual reality, optic flow generated more convincing vection, the sensation of self-movement without physical motion, than the train illusion analogy (TIA). Physiological measures did not consistently correlate with vection experiences.

Keywords:

mixed methods physiological responses qualitative survey vection intensity

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Area of Science:

Virtual Reality
Human Perception
Neuroscience

Background:

Vection, the illusion of self-motion without physical movement, is often simulated using the train illusion analogy (TIA).
Limited research explores vection in virtual environments (VEs), particularly comparing TIA-based VEs with other visual stimuli.
Few studies integrate subjective, physiological, and qualitative feedback to understand vection experiences in VEs.

Purpose of the Study:

To investigate if vection is experienced differently in a VE replicating the TIA versus a VE with general optic flow.
To record subjective and physiological responses to vection stimuli in VEs.
To explore participants' qualitative experiences of vection through open-ended surveys.

Main Methods:

Twenty-nine participants were immersed in two VEs: one replicating the TIA and another presenting optic flow.
Subjective vection ratings and physiological responses (e.g., heart rate, electrodermal activity) were recorded.
A post-experiment survey gathered qualitative feedback on participants' vection experiences.

Main Results:

Optic flow VEs elicited significantly more compelling vection than TIA-based VEs.
No consistent physiological correlates of vection were identified across participants.
Participant feedback revealed discrepancies between quantitative ratings and qualitative descriptions of their vection experience.

Conclusions:

General optic flow may be a more effective stimulus for inducing vection in VEs than the TIA.
Current physiological measures may not reliably capture the subjective experience of vection.
Further qualitative research is essential to fully understand the nuances of vection in virtual reality settings.