Brief report: Social comparison, hypercompetitiveness, and indirect aggression: Associations with loneliness and mental health.

Indirect aggression is commonly used in adulthood, but most researchers have focused on this behavior in romantic relationships or from an intrasexual competition perspective. Therefore, we aimed to understand the social characteristics and mental health correlates of indirect aggression by combining perspectives from developmental psychopathology and evolutionary psychology. We examined: (1) whether social characteristics (social comparison, hypercompetitiveness) contributed to indirect aggression (perpetration, victimization) and (2) whether there were indirect effects from indirect aggression (perpetration, victimization) to mental health difficulties through loneliness. In a cross-sectional sample of 475 young adults (57.7% women, 51.6% White, M age  = 20.2, SD age  = 2.18), path analyses revealed that social comparison predicted indirect aggression victimization, which indirectly predicted mental health difficulties (depression, anxiety, somatic symptoms) through loneliness. In contrast, indirect aggression perpetration was only predicted by hypercompetitiveness. The findings highlight that reframing cognitions associated with social comparison could help prevent indirect aggression and mental health difficulties among young people.