Is there an error of the standard? A critique of Piaget's perceptual theory.
D002657:Child Development; D004215:Distance Perception; D006801:Humans; D007088:Illusions; D007600:Judgment; D008433:Mathematics; D008962:Models, Theoretical; D009949:Orientation; D010465:Perception; D011582:Psychological Theory; D012858:Size Perception; D014796:Visual Perception