An international team of scientists has identified more than 1,200 genetic variants associated with the Big Five personality traits, revealing connections to health, longevity, and life outcomes. The study, led by Ted Schwaba at Michigan State University, demonstrates a substantial genetic influence on personality while acknowledging the continued importance of environmental factors.
The Revived Genomics of Personality Consortium analyzed data from 46 research cohorts worldwide, combining DNA samples with personality assessments measuring openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism. Researchers compared genetic data with personality scores to pinpoint associated genetic variants.
According to Ted Schwaba, faculty at MSU's Department of Psychology, “There is no single ‘personality gene.’” He explained that while individual genetic variants have small effects, their combined impact can be significant. The study found that these genetic patterns were consistent across diverse populations, with variants associated with extraversion in the Netherlands also predicting extraversion in the United States.
The research team utilized methods comparing relatives to determine that these genetic associations were not solely attributable to shared environments. The findings also reveal overlaps between genetic variants linked to personality and those connected to mental and physical health, longevity, education, career paths, and social perceptions.
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