Host: The Japanese Society for Cognitive Psychology
People experience illusory motion when observing the repeating patches of luminance gradient. This illusory motion is strongly perceived especially after saccades. However, a recent study which uses pink-to-white gradation patches showed that the amount of illusory motion diminished when the directions of illusory motion and saccade were parallel. The present study investigated whether colors and smoothness of gradations were critical for the inhibition phenomenon. In the experiments, the magnitude of illusory motion on asymmetric black-to-white gradations (Experiment 1) and arrow-like stimuli without gradations (Experiment 2) was measured. The inhibition was replicated even in these stimuli, indicating that both colors and smoothness of stimuli were not the critical factors for the inhibition phenomenon of illusory motion.
