[1] Studies show the parts of the brain which are active during the whole social interaction are the amygdala, ventromedial frontal cortices and right somatosensory-related cortex and others.
In a social situation, children match the facial expressions of anonymous people with memories of past experiences.
Besides the facial give-aways, factors like body language can also play an important role in determining how to behave in a social situation.
[2] When children encounter a social situation, a series of mental operations takes place before they respond.
Third, they generate answers and fourth, they select a response to finally act out the behavior.