Recently, your friends went out for the evening and got a babysitter. They have gotten babysitters in the seven months since their baby was born, but this time the baby cried when the babysitter came in the door and rushed to pick him up
A few weeks ago when the same sitter came to the house, the baby was willing to go to her. Your friends can't figure out what happened to the baby or the babysitter to change the situation. What can you tell your friends about stranger wariness that might explain the baby's behavior?
What will be an ideal response?
A good answer will be similar to the following:
You can tell your friends that around 6 months of age, stranger wariness emerges in infants. So, infants who had gone to strangers readily just a few weeks before will fuss or cry when approached by a stranger. In general, infants show less stranger wariness in familiar environments than unfamiliar environments. Infants also show more wariness when someone rushes at them (like the babysitter did) and less wariness when they are given time to "warm up" to the stranger. This wariness will decline as your friends' baby learns to interpret facial expressions and recognizes when strangers are friendly or hostile.
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