What evidence shows that a newborn prefers the sound of his/her mother's voice?

a. A newborn sucks harder if sucking turns on the sound of the mother's voice.
b. A newborn turns its head toward the mother's voice, but not toward other voices.
c. Hearing the mother's voice elicits a smile, but other voices do not

d. Hearing the mother's voice helps the infant go to sleep.


a

Psychology

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