New research reveals genetic variants influence personality traits like extraversion and conscientiousness. These genetic associations are spread across the genome and have small individual effects. Personality develops through a combination of genetics, family, and life experiences. The study found genetic links between personality and health outcomes like substance use. Understanding personality requires considering both biology and environmental influences.

More than 1,200 genetic variants have been linked to the Big Five personality traits, and many of the same variants are also associated with health, longevity, careers, income,…

Researchers identify more than 1,200 personality-linked genetic variants, with effects largely independent of family background.