Why do information-processing researchers sometimes examine infants' heart rate as an index of attention rather than (or in addition to) infants' gaze?
A) The methods used to quantify infants' gaze are unreliable.
B) Infants are easily distractible and shift their gaze from one object to another.
C) The methods used to quantify infants' gaze are subjective.
D) Looking at something alone does not necessarily mean that the infant is processing information about the stimulus.
E) Heart rate is more easily quantifiable than gaze.
Correct Answer:
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