title: Müller-Lyer: illusion of size or position?
mesh_terms: D000293:Adolescent; D000328:Adult; D004193:Discrimination Learning; D005260:Female; D005556:Form Perception; D006801:Humans; D007088:Illusions; D008297:Male; D009903:Optical Illusions; D009949:Orientation; D012858:Size Perception