title: Exploratory studies of early cognitive development.
mesh_terms: D000293:Adolescent; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D003210:Concept Formation; D006801:Humans; D007223:Infant; D008607:Intellectual Disability; D011340:Problem Solving; D011582:Psychological Theory; D013028:Space Perception; D013647:Task Performance and Analysis; D014796:Visual Perception