The parents of a 3-month-old ask the nurse what behavior they should e

The parents of a 3-month-old ask the nurse what behavior they should expect. The nurse informs the parents that the child will be able to:

1. Say Da-da
2. Smile responsively
3. Differentiate strangers
4. Play social peekaboo games

ANSWER

ANS: 2
Two- and 3-month-old infants begin to smile responsively rather than reflexively. By 1 year of age, infants have two- or three-word vocabularies such as Da-da. By 8 months, most infants can differentiate a stranger from a familiar person. By 9 months, infants play simple social games such as patty-cake and peekaboo.