The association of relative deprivation, interpersonal relationships, and problematic social media use in 39 countries/regions: Does school contextual inequality matter?

We highlight RD's associations with PSMU primarily through interpersonal pathways, with contextual inequality amplifying them. Targeted interventions that address both socioeconomic disparities and interpersonal dynamics can help mitigate PSMU. These outcomes underscore the need for policies that reduce economic gaps and foster supportive relationships.