<p>Anonymized data set.</p>

This study examined the association between event-related disclosure and posttraumatic growth (PTG). Specifically, it targeted the Japanese adult, assessed attitudes toward event-related disclosure, and examined event-related rumination as a mediating variable. A cross-sectional online survey was conducted among Japanese adults aged 20–59. Participants completed measures of demographic characteristics, stressful life events attributes, attitudes toward disclosure, event-related rumination, and PTG. Analysis of data from 480 individuals revealed that neither willingness to disclose nor resistance to disclose was directly associated with PTG. However, both willingness to disclose and resistance to disclose were positively associated with PTG through deliberate rumination and negatively associated with PTG through intrusive rumination. The effect sizes for willingness to disclose were approximately three times greater than those for resistance to disclose. These findings suggest that event-related disclosure may enhance PTG by promoting deliberate meaning-making processes, while also potentially hindering it by reinforcing involuntary negative thinking. Furthermore, these effects may be stronger when individuals are more proactive and disclose more frequently. These results have important implications for interventions aimed at enhancing PTG through event-related disclosure.本研究考察了事件相关披露（event-related disclosure）与创伤后成长（posttraumatic growth, PTG）之间的关联。具体而言，研究以日本成年人群为对象，评估了其对事件相关披露的态度，并以事件相关反刍（event-related rumination）作为中介变量（mediating variable）。研究针对20至59岁的日本成年人开展了横断面线上调查（cross-sectional online survey），参与者完成了人口统计学特征（demographic characteristics）、应激生活事件属性、披露态度、事件相关反刍及创伤后成长相关量表的测评。对480名受访者的数据进行分析后发现，披露意愿与披露抵触均未与创伤后成长呈现直接关联。然而，二者均可通过刻意反刍（deliberate rumination）与创伤后成长呈正相关，同时又可通过侵入式反刍（intrusive rumination）与创伤后成长呈负相关。披露意愿对应的效应量（effect sizes）约为披露抵触的三倍。上述研究结果表明，事件相关披露可通过促进刻意意义建构过程（meaning-making processes）增强创伤后成长，同时也可能因强化不自主负性思维（involuntary negative thinking）而阻碍创伤后成长。此外，当个体更为主动且披露频率更高时，上述效应可能更为显著。本研究结果对于通过事件相关披露干预手段提升创伤后成长的相关实践具有重要参考价值。