DeCasper and Fifer used _____ as the dependent variable to test if two-day-old infants could identify the sound of the mother's voice.
A) eye movements
B) head tilts
C) pattern of nipple sucking
D) eye blinks

Question

DeCasper and Fifer used _____ as the dependent variable to test if two-day-old infants could identify the sound of the mother's voice.
A) eye movements
B) head tilts
C) pattern of nipple sucking
D) eye blinks

Quizplus · Accepted Answer

DeCasper and Fifer used the pattern of nipple sucking as the dependent variable to test if two-day-old infants could identify the sound of the mother's voice. The study found that infants spent more time sucking on a nipple that produced their mother's voice than on a nipple that produced a stranger's voice, indicating that they were able to identify the sound of their mother's voice. Eye movements, head tilts, and eye blinks were not used as measures in this particular study.

DeCasper and Fifer Used _____ as the Dependent Variable to Test