Learning and the spiral illusion.
D001288:Attention; D004192:Discrimination, Psychological; D005366:Figural Aftereffect; D005403:Fixation, Ocular; D005556:Form Perception; D006801:Humans; D007088:Illusions; D007858:Learning; D008568:Memory; D008959:Models, Neurological; D009039:Motion Perception; D009433:Neural Inhibition