Early infant social interaction with parents and strangers.
D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D010287:Parent-Child Relations; D011287:Prejudice; D002666:Psychology, Child; D012904:Smiling; D012919:Social Behavior