Personality Traits Linked to Family Size
A new study has identified specific personality traits that correlate with the number of children individuals have.
Updated on Oct. 6, 2026 in Relationships — General
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Bucknell University researchers found that extraversion and agreeableness are linked to larger families. Meanwhile, higher levels of neuroticism were associated with having fewer biological children.
Why it matters
Understanding these links helps researchers compare how personality traits influence reproductive outcomes across different cultural settings. The findings highlight the complex interplay between individual temperament and life decisions.
The study of 15,000 participants revealed that extraversion and agreeableness correlate with more children, while neuroticism correlates with fewer. Conversely, traits like openness and conscientiousness showed no significant impact on family size.
The players
Bucknell University
This private liberal arts university located in Lewisburg, Pennsylvania, served as the home base for the researchers who conducted the study.
The details
Published in the journal Culture and Evolution, the research examined representative samples from the United States, Canada, and Japan. The analysis also noted that married participants and women reported having more biological children than their counterparts.
Timeline
The findings were published in the journal Culture and Evolution in October 2026.
Culture Shift
The study applies the Big Five personality model to modern demographic research, marking a transition in how sociologists quantify the impact of individual temperament on global fertility trends. This shift moves away from purely economic explanations for family size to include psychological predictors.
These findings may lead individuals to reconsider how their personality traits might influence their long-term life planning and family goals. Understanding these psychological correlations provides a new framework for evaluating personal decisions regarding family size.
The takeaway
Personality traits offer a subtle but measurable lens through which to view human reproductive patterns across different cultures. While temperament plays a role, researchers stress that individual choices remain heavily influenced by the broader social and economic context.
Further reading
For more on the factors that shape personal and interpersonal life, visit Relationships — General.
Source note: This article includes information reported by NorthcentralPA.
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