The aim of this paper is to analyze the mixing effect of linear vection (LV) and circular vection (CV) when perceiving both of them. Vection is a visual induced self-motion illusion caused by observing a moving pattern in certain direction. And it is classified with two types LV and CV by their moving direction; LV is rectilinear motion sense, and CV is rotational motion sense. Most studies focus on either LV or CV. Therefore, in this paper, we focused on both rectilinear and rotational directions and analyzed the relationship between LV and CV. Through the experiments where rectilinear and rotational visual stimulus coexist, we found that LV and CV strength are in a negative correlation, and the vection strength is obtained as vector sum of LV and CV strength measured under each condition.
