Age, ability and positioning variables influencing pupils' judgments of the size of the Müller-Lyer illusion.
D000124:Achievement; D000293:Adolescent; D000367:Age Factors; D002648:Child; D006801:Humans; D007088:Illusions; D009039:Motion Perception; D009903:Optical Illusions; D009949:Orientation; D011932:Reading; D012858:Size Perception; D014794:Visual Fields