positive responses from social partners or through fostering more opportunities for social interactions. Our longitudinal analyses suggest that these effects are present by middle childhood, persist through adolescence, and possibly, through adulthood. These findings are consistent with previous studies that report similarities in relationship quality across different partners and over time (77), and with previous reports of associations between prosocial personality characteristics and marital quality and/or marital status (78–81). Importantly, the current study provides insight to the possible genetic sources of relationship quality and links between personality and relationship quality.
