‘The neuroimaging results showed significant activity in two regions of the brain during the encoding of impression-relevant information. The first, the amygdala, is a small structure in the medial temporal lobe that previously has been linked to emotional learning about inanimate objects, as well as social evaluations based on trust or race group. The second, the posterior cingulate cortex (PCC), has been linked to economic decision-making and assigning subjective value to rewards. In the Nature Neuroscience study, these parts of the brain, which are implicated in value processing in a number of domains, showed increased activity when encoding information that was consistent with the impression.
“Even when we only briefly encounter others, brain regions that are important in forming evaluations are engaged, resulting in a quick first impression,” commented NYU’s Phelps.
NYU’s Schiller, the study’s lead author, concluded, “When encoding everyday social information during a social encounter, these regions sort information based on its personal and subjective significance, and summarize it into an ultimate score–a first impression.” ‘ via physorg.com.