| Sumario: | Internet addiction (IA) has become a global concern among college students. To explore the psychophysiological mechanism that is related to IA, this study investigated the role of resilience, loneliness, and resting respiratory sinus arrhythmia (RSA) in IA through a moderated mediation model. A group of 108 (Mage = 18.93, SD = 0.914; 68 male) Chinese undergraduate students completed questionnaires of resilience, loneliness, and IA. Physiological data were collected during their visit to a university laboratory. Results revealed that loneliness mediated the negative association between resilience and IA, with resting RSA and resilience interactively predicted loneliness. Specifically, resilience was negatively related to loneliness only when students had low, rather than high, levels of resting RSA. These findings enrich our understanding of how resilience is related to college students' IA and highlight the protective role of resting RSA in this association.
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