Prosociality, which refers to dispositions to allocate one's attention and energy to the needs of others, is indicative of social proficiency and adaptive functioning in adolescence. Greater abilities for self-regulation in adolescence are widely considered to foster prosociality (Hastings et al., 2023
Hodge et al., 2023), including physiological regulation, and particularly activity within the parasympathetic nervous system (PNS
Hastings et al., 2023). The current study examined the extent to which PNS reactivity to experiences of negative emotions were associated with adolescents' prosociality. In a sample of 220 adolescents (M