Effects of perceptual shielding in the development of spatial perspectives.
D000367:Age Factors; D002648:Child; D002657:Child Development; D003071:Cognition; D003463:Cues; D005260:Female; D006801:Humans; D008297:Male; D009949:Orientation; D011582:Psychological Theory; D013028:Space Perception; D013647:Task Performance and Analysis; D014796:Visual Perception