Development of search and object permanence during infancy.
D002657:Child Development; D003071:Cognition; D003210:Concept Formation; D004532:Ego; D006801:Humans; D007223:Infant; D009039:Motion Perception; D009048:Motor Skills; D009769:Object Attachment; D011582:Psychological Theory; D014110:Touch; D014794:Visual Fields; D014796:Visual Perception