13. When determining the emotions experienced by an infant (under two years of age), the main factor researchers depend on is what?
From Quiz Motor and Social Development in Early Childhood
Answer:
Facial expressions
A baby exhibits recognisable facial expressions, such as smiling, frowning, looks of surprise, disgust, and so on, almost as soon as they are born. Since a child under two years would not have particularly reliable verbal skills, nor could a mother's subjective viewpoint be considered factual, facial expressions are used as the main determinant of emotions like anger, joy, fear, excitement, and distress.