title: Ebbinghaus illusions: size contrast or contour interaction phenomena?
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005366:Figural Aftereffect; D005556:Form Perception; D006801:Humans; D007088:Illusions; D008297:Male; D009903:Optical Illusions; D012858:Size Perception; D014794:Visual Fields