Abstract
Research highlights the positive impact of social connectedness on subjective well-being. In this paper, we test a model in which an identity-based mechanism links a structural form of connectedness (significant social ties) with two psychological well-being outcomes, life satisfaction and self-esteem. Using data from the LIVES Longitudinal Lausanne Youth Study (LIVES-LOLYS, N = 422), a longitudinal mediation path model tests direct and indirect effects, via the strength of social identification, of the number of significant social ties in two life domains (friends and family) on life satisfaction and self-esteem. Results showed positive associations between the number of significant ties and social identification in the concordant domain, empirically linking the structural and subjective forms of social connectedness. Moreover, our model displays significant indirect effects in the friend domain, but not in the family domain. Having more friends as significant social ties predicted higher social identification with friends, and this was longitudinally associated with higher life satisfaction and self-esteem. Findings show a new mechanism linking structural and subjective forms of social connectedness, unpacking their concerted impact in protecting well-being. The differences between the friend and family domains are discussed in the framework of both life-course and social identity perspectives.