Infants cannot tell us their feelings, so they use facial expressions to tell us what they want...but this is not reliable, because 1) people use diverse responses to express a particular emotion, 2) same general response can express several emotions, for example, a smile might convey joy, embarassment or contempt, depending on context
EMOTIONAL EXPRESSION cary with a person's developing capacities, goals, and context, meaning that researchers must interpret multiple cues in order to understand babies' emotions.
Infants use familiar caregivers as a SECURE BASE or point from which to explore, venturing into the environment and then returning for emotional support. Encounters with strangers follow 2 approaches: (1) approach with interest and friendliness or 2) avoidance due to fear