To determine if an apparent motion for chromatic stimulus occurs, we conducted subjective evaluation-tests using complementary color pair of equiluminous red-green/yellow-blue square patterns. Stimulus patterns were presented on the face of a color CRT over a wide range of the spatial separation (SS) and the stimulus onset asynchrony (SOA). At short-range of the SS (maximum about 15) and of the SOA (maximum about l00 msec), it was perdeived as a smooth movement both in red-green and in yellow-blue patterns.
