Prejudice is related to the structure of human brain

How does prejudice arise? The posterior medial prefrontal cortex (PMFC) can promote human confirmation bias, according to a brain science study published in nature neuroscience Specifically, the posterior part of the medial prefrontal cortex is less sensitive to opinions that don't make you believe in what you already have Humans tend to ignore information that undermines past choices and judgments From politics to science and education, this kind of confirmation bias has an important influence, but the mechanism behind this belief formation feature has been unknown In view of this, researchers Andreas Karpas and Tari Charlotte, from the urban college of the University of London in the UK, have assumed that this process may occur in the posterior part of the medial prefrontal cortex, which is responsible for tracking decision-making information and signaling when decisions should be changed The team teamed up 42 adults in two and asked them to determine separately whether the listing price of the property was higher or lower than the displayed price After that, the participants made bets based on their confidence in their judgment - ranging from 1 to 60 cents Next, each subject entered the MRI scanner, and the experimenter showed them the real estate information again and reminded them of their initial judgment and bet Later, they saw their peers' judgments and bets on the same real estate information, when they were asked to submit the final bet - showing their confidence in their initial judgment The research team found that when a partner's judgment confirmed the initial judgment of a subject, the subject would increase the final bet, and the final bet was related to the partner's bet The researchers also identified activity in the posterior part of the medial prefrontal cortex, which regulates the effect of a partner's bet on a final bet, but only if the two judgments are consistent This shows that the posterior part of medial prefrontal cortex is sensitive to each other's opinions only when they agree with each other, while in the case of disagreement, the sensitivity will decrease, which will lead to the confirmation bias (BIOON Com)