Predictive versus perceptual responses to Piaget's water-line task and their relation to distance conservation.
D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D003210:Concept Formation; D004215:Distance Perception; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D014796:Visual Perception