Social support has been an important social-contextual protective factor against loneliness. However, how individual-level protective factors, such as social competence and a positive stress mindset, may jointly influence the relationship between social support and loneliness is less known. This study examined to what extent the link between social support and loneliness would be mediated by social competence and moderated by stress mindset among migrant children. In total, 198 rural-to-urban migrant children aged 10-14 years (56.1% girls) in Beijing, China, completed a set of self-reported questionnaires. A moderated mediation analysis was performed. We found that perceived social support was associated with a lower level of loneliness, and this association was significant only for migrant children holding a positive stress mindset (indicated by a high ratio of the stress-is-a-challenge mindset to the stress-is-a-threat mindset). Notably, across children with different stress mindsets, perceived social support was indirectly related to a lower level of loneliness through greater social competence. Our findings suggest that social competence and a stress-is-a-challenge mindset are important individual-level protective factors for migrant children to overcome loneliness. Social competence can carry the effect of social support, and a stress-is-a-challenge mindset can optimize the effect of environmental resources on mental health.
Keywords: China; challenge; loneliness; rural-to-urban migrant children; social competence; social support; stress mindset; threat.