- New research shows that these tendencies are heavily influenced by biological forces. In one study, psychologists used MRI to scan
the brains of people who reported being agreeable versus disagreeable on a survey. The agreeable people had greater volume in the
regions of the brain that process the thoughts, feelings, and motivations of others, such as the posterior cingulate cortex. According to
behavioral geneticists, at least a third of agreeableness, and possibly more than half, is heritable—attributable to genes. Whether people
have an agreeable or disagreeable personality seems to be at least partially hardwired.
michael s
(Michael S)
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