Background: Although previous research has demonstrated that fear and guilt have an effect on posttraumatic stress disorder (PTSD), it is still unclear how these two emotions affect posttraumatic growth (PTG). Moreover, few studies have examined the mechanisms by which fear and guilt affect PTSD and PTG. Guided by Lee et al.'s theory of PTSD generation mechanisms and Calhoun and Tedeschi's PTG theory, the current study proposes that intrusive rumination (IR) and deliberate rumination (DR) may play a mediating role in the effects of guilt and fear on PTSD and PTG. Objective: This study aimed to simultaneously examine the mediating roles of IR and DR in the relationship between fear, guilt, PTSD, and PTG. Method: This study employed a two-wave longitudinal design. A total of 408 adolescent survivors were assessed using self-report questionnaires after the Ya'an earthquake in China. Measures were obtained for trauma exposure, subjective fear, survivor guilt, IR, and DR at three and a half years after the Ya'an earthquake (Time 1), while PTSD and PTG were assessed at time point four and a half years after the Ya'an earthquake (Time 2). Results: The results showed that both fear and guilt had a direct and positive effect on PTSD and PTG. Fear and guilt were positive predictors of PTSD and negative predictors of PTG through the mediating variable of IR. DR mediated the relationship between guilt and PTG but not PTSD, and also mediated the relationship between IR and PTG. Conclusions: Study findings indicate that fear, guilt, and intrusive rumination may contribute to PTSD symptoms in adolescent trauma survivors. Results also suggest that adolescent survivors can grow emotionally and psychologically following traumatic events, and that directed rumination may contribute to such growth. Interventions that reduce fear, guilt, and intrusive rumination while increasing directed rumination may assist adolescent trauma survivors in recovery and growth.

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