Applications of the Piagetian literature to severely and profoundly mentally retarded persons.
D000293:Adolescent; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000523:psychology*; D011582:Psychological Theory