Responding to Other People's Posture: Visually Induced Motion Sickness From Naturally Generated Optic Flow

Area of Science:

• Human-computer interaction
• Neuroscience
• Virtual reality

Background:

• Altering the perception-action relationship in digital environments can negatively impact users.
• Individual differences in motion characteristics correlate with susceptibility to motion sickness.
• Understanding how virtual motion affects postural control is crucial for immersive technologies.

Purpose of the Study:

• To investigate the impact of virtual motion on postural regulation.
• To analyze human responses to different types of optical flow generated by other people.
• To explore the relationship between perceived motion and sickness in virtual environments.

Main Methods:

• Participants were exposed to virtual optic flow generated by individuals with varying susceptibility to motion sickness.
• Postural regulation was monitored during exposure to different optical flow conditions.
• The incidence of motion sickness was recorded for each participant.

Main Results:

• Participants showed stronger coupling and increased motion sickness when exposed to optic flow from a non-sick individual.
• The perceived usability of well-produced optic flow did not necessarily facilitate behavior.
• The open-loop nature of the virtual stimuli disrupted rather than aided perception-action coupling.

Conclusions:

• The brain's interpretation of virtual motion, even when seemingly usable, can lead to adverse effects like motion sickness.
• The study highlights the complex interplay between perception, action, and virtual environments.
• Future research should consider the implications of optic flow characteristics in designing virtual experiences to mitigate sickness.