No Matter the Distance? A Theoretical Framework of Age-Diverse Friendship Effects

Friendship is the most transformative form of high-quality intergroup contact, with the capacity to build solidarity, foster cooperation, and bridge divides. Age-diverse friendships, in particular, offer unique opportunities to connect people of different ages, yet their role in work and non-work settings requires further theorizing. We thus develop a theoretical framework of age-diverse friendship effects that explains how such effects extend beyond the dyad to influence organizations and society at large. Building on intergroup contact theory, the taxonomy of transfer effects, and research on other-oriented processes, we propose that age-diverse friendships generate spillover effects at three levels: from individual friends to the broader age group (primary transfer), from age groups to other social groups (secondary transfer), and toward more general liberalization effects that transcends group boundaries (tertiary transfer). Central to these transfer effects are empathic concern and perspective taking, which enable friendships to foster prosocial behavior in work and non-work contexts. We further theorize that the extent and direction of these primary, secondary, and tertiary transfer effects depend on two boundary conditions: age distance and semantic distance. Our theoretical framework positions age-diverse friendships as a powerful vehicle of social change, with the potential to not only reduce tensions but also to strengthen intergroup cooperation and address broader societal challenges.