Large-scale genetic study links DNA to Big Five personality traits

An international research team has conducted the largest genetic study to date, analyzing DNA and personality data from over one million individuals to understand the link between genetics and the ‘Big Five’ personality traits.

The study identified 1,260 genetic variants associated with personality dimensions, including openness, conscientiousness, extraversion, agreeableness, and neuroticism. Notably, 824 of these variants had not been previously linked to these traits. While the findings suggest that genetics explain between 7.4% and 16% of the variation in personality traits, researchers emphasized that DNA does not dictate personality entirely. Environmental factors, diet, and culture play fundamental roles in shaping an individual.

Experts noted that while these genetic patterns are significant when studying large populations, they are not effective for predicting an individual's personality from a DNA sample. However, the findings may assist the medical field in identifying individuals potentially more susceptible to mental health issues, as certain genetic markers for neuroticism are linked to increased hospitalizations.