This has been used as a dependent variable in infant sensory-perceptual research.
A) length of parental contact
B) breathing rate changes
C) movement changes
D) heart rate changes

Question

Quizplus · Accepted Answer

Heart rate changes are often used as a dependent variable in infant sensory-perceptual research because they can indicate an infant's level of attention or arousal in response to stimuli.

This Has Been Used as a Dependent Variable in Infant