Effect of distance and size of standard object on the development of shape constancy.
D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D002648:Child; D002675:Child, Preschool; D004215:Distance Perception; D005260:Female; D005556:Form Perception; D006801:Humans; D008297:Male; D009949:Orientation; D012737:Sex Factors; D012858:Size Perception; D013028:Space Perception