Everyone Assumes DNA Shapes Your Personality. It Turns Out Something Else Is Doing Most of The Work
Written in genetic code.
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A comprehensive genetic study involving over one million participants has revealed that while DNA influences personality, environmental factors play a substantially larger role in shaping who we are. Researchers identified more than 1,200 genetic variants linked to the Big Five personality traits—extraversion, agreeableness, conscientiousness, neuroticism, and openness to experience—with over 800 variants being newly discovered. However, these genetic factors account for only 7 to 10 percent of individual personality differences, meaning the majority of personality variation stems from other sources.
The study, published in Nature and led by researchers from Michigan State University and the University of Texas at Austin, combined personality and genetic data from 46 different cohorts. Scientists conducted genome-wide association studies to identify genetic patterns across large populations rather than predict individual personalities. According to genetic epidemiologist Michel Nivard, genetics cannot reliably forecast someone’s personality on a personal level, though they reveal broader population patterns when combined with other research data.
The findings underscore the complexity of human personality development. Even with knowledge of someone’s genetic variants, researchers could explain less than 4 percent of personality variation in test groups. Environmental factors, including culture, diet, and upbringing, appear to be the dominant forces shaping personality traits. The research suggests genetics provides a foundation, but life experiences and external influences collectively determine most of the differences in how individuals think, feel, and behave.
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Originally reported by Sciencealert →
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