How the brain helps us navigate social differences

Our brain responds differently if we talk to a person of a different socioeconomic background from our own compared to when we speak to someone whose background is similar, according to a new imaging study by UCL and Yale researchers. In the study, published in the journal Social Cognitive and Affective Neuroscience , 39 pairs of participants had a conversation with each other while wearing headsets that tracked brain activity. Researchers found that, among pairs of people who had very different socioeconomic backgrounds - calculated according to education level and family income - there was a higher level of activity in an area of the frontal lobe called the left dorsolateral prefrontal cortex. The area is associated with speech production and rule-based language as well as cognitive and attentional control. The findings support previous research suggesting that frontal lobe systems play a role in detecting bias and helping us to regulate our behaviour to avoid bias expression. The increased activity in the left frontal lobe was observed in both participants and was more alike than the brain responses of participants talking to someone of a similar background. In a questionnaire following their task, participants paired with people of different backgrounds reported a slightly higher level of anxiety and effort during their conversation than those in similar-background pairs.