Columbia subject headings:
Infant psychology.
Interpersonal communication.
Nonverbal communication.
Parent and child.
Harvard subject headings:
Infant psychology.
Interpersonal communication in children.
Interpersonal communication.
Nonverbal communication in children.
Nonverbal communication.
Parent and child.
Princeton subject headings:
Interpersonal communication in children.
Nonverbal communication in children.
Parent and child.