University of Oxford
Robin Dunbar
Known for:The cognitive and time constraints on human social networks, and how friendships decay without active maintenance
Key findings
- 2011
Following students for 18 months across the school-to-university transition, friendships that received less contact declined measurably in emotional closeness while kin relationships stayed stable — and decline was buffered by talking together for women and by shared activities for men. ↗
- 2018
Friendship is an extremely costly relationship in time investment: emotional closeness declines when contact frequency drops, so a limited time budget forces trade-offs in who stays in the inner layers of a person's network. ↗