Narcissism: Is it Hereditary?

New research reveals that narcissism is largely hereditary and linked to genes rather than upbringing. The study, published in Social Psychological and Personality Science, examined the personality traits of thousands of twins and their families.

The results indicate that narcissistic tendencies are biologically passed from parents to children, while experiences in the family environment do not appear to play a significant role in shaping this trait.

Narcissism is a stable personality trait that includes a sense of grandiosity, a need for admiration, an expectation of preferential treatment, and a strong desire for social status. Scientists are trying to understand how narcissism is 'born,' as it tends to stabilize from adolescence onwards.

The research used data from the German TwinLife project, a large database of twins. The sample included 6,715 individuals, including monozygotic and dizygotic twins, their siblings, their parents, and the partners of the adult participants. Participants completed questionnaires assessing various aspects of narcissism.

The results showed that about half of the differences in narcissism levels are due to genes, while the other half are due to personal experiences. The shared family environment did not appear to have any measurable effect.

The researchers emphasize that further research is needed to understand the biological mechanisms that affect genes and how an innate sensitivity to social status 'meets' life experiences.

Source: Vita