Peer interactional abilities of children from four age-groups.
D000367:Age Factors; D002648:Child; D002652:Child Behavior; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007398:Interpersonal Relations; D008297:Male; D010379:Peer Group; D014705:Verbal Behavior