Suppose a Newborn Sucks to Hear Its Father's Voice

Multiple Choice

Suppose a newborn sucks to hear its father's voice.When the response habituates,the experimenters substitute a different man's voice.What do we infer if the sucking rate remains the same?​
The newborn hears a difference between the voices.

A) The newborn prefers the sound of women's voices.
B) ​The newborn prefers the sound of the father's voice.
C) ​The newborn does not hear a difference between the voices.
D) ​The newborn hears a difference between the voices.