Subthreshold addition of real and apparent motion.
D000328:Adult; D005260:Female; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008027:Light; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D009903:Optical Illusions / Q000502:physiology*; D010783:Photometry; D012684:Sensory Thresholds / Q000502:physiology; D013997:Time Factors