More than 1,000 gene variants are associated with personality, including more than 800 not previously linked to it, according to a study published in the journal Nature. These genetic variants also “partially predict mental and physical health, longevity, education, career paths and outcomes, and even how people are perceived by close others,” Michigan State University said in a news release.
While scientists have known that a variety of factors, including DNA, could affect personality, the “challenge has been deciphering the specific pathways through which a genetic blueprint nudges the direction of a person’s life,” said The New York Times. To figure that out, researchers had participants provide DNA samples and fill out a questionnaire measuring the “Big Five” personality traits: “openness to experience, conscientiousness, extraversion, agreeableness and neuroticism,” MSU said. Those traits are “relatively stable and habitual differences in how people think, feel and act.”
Participants shared demographic and lifestyle information, allowing the researchers to “see links between personality traits, genetic variants and other parts of people’s lives,” said Time. For example, the variants linked to conscientiousness were “associated with being more active during the day while variants linked to openness to experience and extraversion were linked to being more of a night owl,” said the release. People with variants associated with neuroticism tended to spend more time at hospitals.
Of course, experiences can shape personality too. Genetic variants linked to openness predict that a person will “move to more cosmopolitan neighborhoods,” MSU said. But “living in those neighborhoods may reinforce and further shape that same trait.”
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