Visually Induced Motion Sickness after Watching Scenes Oscillating at Different Frequencies and Amplitudes

Background: Viewers reported different vection (an illusion of selfmotion) when watching scenes oscillating at similar velocities but at different frequencies and amplitudes. Hypothesis: It was hypothesized that different levels of VIMS would be reported after watching scenes oscillating at similar velocity but with different frequencies. Method: Ten participants were exposed to a checker board pattern expanding and contracting at five frequencies (0, 0.05, 0.1, 0.2, 0.8Hz). The motions differed in amplitudes but had similar spatial content and r.m.s. velocities. Results: Preliminary data indicated that vection reduced significantly as frequency increased but nausea did not change. Velocity, rather than frequency (or amplitude), dominated the provocation of VIMS.