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Do You Trust People? Your Brain Structure Depends On It

by Bidita Debnath on March 22, 2015 at 10:03 PM
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Do You Trust People? Your Brain Structure Depends On It

New research has revealed that brain structure depends on how trusting people are of others.

Brian Haas, an assistant professor in the department of psychology, and his team of researchers used two measures to determine the trust levels of 82 study participants.

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Participants filled out a self-reported questionnaire about their tendency to trust others. They also were shown pictures of faces with neutral facial expressions and asked to evaluate how trustworthy they found each person in the picture. This gave researchers a metric, on a spectrum, of how trusting each participant was of others.

Researchers then took MRI scans of the participants' brains to determine how brain structure is associated with the tendency to be more trusting of others.
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The researchers found differences in two areas of the brain. "The most important finding was that the grey matter volume was greater in the ventral medial prefrontal cortex, the brain region that evaluates social rewards, in people that tended to be more trusting of others," said Haas. "Another finding that we observed was for a brain region called the amygdala. The volume of this area of the brain, which codes for emotional saliency, was greater in those that were both most trusting and least trusting of others. If something is emotionally important to us, the amygdala helps us code and remember it." Future studies may focus on how, and if, trust can be improved and whether the brain is malleable according to the type of communication someone has with another, he said.

Source: ANI
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