title: Development of the object concept as manifested in changes in the tracking behavior of infants between 7 and 20 weeks of age.
mesh_terms: D000367:Age Factors; D002657:Child Development; D005133:Eye Movements; D006801:Humans; D007223:Infant; D009039:Motion Perception; D010466:Perceptual Closure; D011336:Probability; D014785:Vision, Ocular; D014796:Visual Perception