Drawing on conservation of resources (COR) theory, this study examines how and when sincere social interaction affects tourist immersion at the destination. We develop a moderated mediation model in which emotional solidarity mediates the relationship between sincere social interaction and tourist immersion, while extraversion moderates the link between sincere social interaction and emotional solidarity. Data were collected from 391 tourists via an online survey and were analyzed using partial least squares structural equation modeling (PLS-SEM). The findings indicate that sincere social interaction directly influences tourist immersion, and this relationship is mediated by emotional solidarity. Furthermore, extraversion significantly moderates the effects of sincere social interaction on emotional solidarity, and this effect is stronger for tourists with high extraversion scores. Additionally, extraversion strengthens the indirect link between sincere social interaction and tourist immersion, and again, the link is stronger for highly extraverted tourists.

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This study investigates when and how trait gratitude stimulates tourist citizenship behavior (TCB). Building on trait activation theory, the present study proposes a mediated moderation model in which tourists’ trait gratitude and positive resident–tourist contact jointly influence TCB. In driving TCB, the interactive effect of trait gratitude and positive contact is mediated by perceived insider status. Data were collected from 497 Mount Wuyi tourists and analyzed using structural equation modeling. The results reveal that trait gratitude positively influences TCB, and this relationship is moderated by positive contact. Furthermore, positive contact moderates the association between trait gratitude and perceived insider status. Additionally, perceived insider status, which is positively related to TCB, significantly mediates the moderating effects of positive contact on the link between tourists’ trait gratitude and TCB.