This study investigated the mutual relationship between pyramids and rotational speed as well as the causal relationship between induced movement, pyramids, and rotational speed from the perspective of the appearing angles at the rotational speed thre...
This study investigated the mutual relationship between pyramids and rotational speed as well as the causal relationship between induced movement, pyramids, and rotational speed from the perspective of the appearing angles at the rotational speed threshold boundary line by using visual psychology and psychophysical adjustment methods. When pyramids with varying numbers of sides rotate at various speeds, two types of visual influence phenomena form and exhibit differing amplitudes. This directly influences the appearance of boundary lines of the upper and lower absolute thresholds and the range of the rotational speed threshold of the induced movement in individual and whole pyramids. As the number of pyramid sides increases, the rotation angle decreases, reducing the area of the dynamic virtual form. As a pyramids number of sides decreases, the visual influence level increases. A cone is the optimal design for dynamic optical illusions for perception of induced movement, and a triangular pyramid has the lowest rotational speed threshold for perception of induced movement and disappears the fastest.