As fully autonomous vehicles become more common, media browsing and PC work in the car increase, which is likely to cause carsickness due to a mismatch between visual and vestibular sensory information. We developed an original method to suppress carsickness by presenting visual stimuli expecting to reduce this inconsistency, and we conducted real car experiments on a test course with nine male participants (Ethics Review No: 2022-28). Subjective ratings and physiological measurements were employed during the experiment to verify the effectiveness of this approach. In our previously reported analysis of subjective ratings, we were able to induce stronger carsickness than in simulator experiments, but the effectiveness of the carsickness suppression method was not verified. In this study, we have conducted a comprehensive assessment of the carsickness suppression method, incorporating the analysis of physiological indices.
