Analysis of the Mixture of Linear and Circular Vections in Immersive Visual Space Comparison of Forward and Backward Moving Visual Stimuli

摘要

Vection is a visually induced, self-motion illusion caused by observing a moving pattern in certain direction. Vection is classified into two types based on its moving direction: linear vection (LV; rectilinear motion sense) and circular vection (CV; rotational motion sense). Most studies focus on either LV or CV, and the mutual effects between LV and CV remain uninvestigated. Therefore, in this study, we aim to reveal the relationship between LV and CV by analyzing; whether or not each vection was perceived independently from visual stimuli with a spiral motion. From the results of our two experiments, we demonstrate that, as vection in one direction that is perceived from a visual stimulus with the spiral motion is strengthened, the vection in another direction is weakened. In other words, the strengths of both LV and CV have a negative correlation. Additionally, we explain that the influence degree of LV strength on the evaluation of CV is different between backward and forward LV.