Development of the Content Repertoire of Event-Related Disclosure Inventory

Human beings are wired to talk about what hurts them. When a difficult event strikes—a loss, an accident, a betrayal—our minds often try to make sense of it by turning the experience over and over in our thoughts. Psychologists call this rumination. Sometimes these thoughts are involuntary and distressing, but other times, people deliberately reflect on the event to find meaning or value. This deliberate reflection is a known pathway to posttraumatic growth, a phenomenon where individuals emerge from hardship with a deeper sense of personal strength, new possibilities, or a changed perspective on life. While researchers have long known that talking about these events helps, they have struggled to measure exactly what people say when they do. Previous studies asked simply if people talked and how often, but they missed the nuance of the conversation itself. Without a way to distinguish between different types of stories, it has been difficult to understand which specific kinds of sharing actually lead to growth and which might not.

To solve this puzzle, researchers at Nagoya University set out to build a new tool that could capture the full range of what people say when they disclose their traumatic experiences. They began by asking a group of Japanese adults to describe, in their own words, exactly what they had talked about when they shared their stories with others. The participants were not just asked if they spoke; they were asked to detail the content of those conversations. The researchers sorted through hundreds of these descriptions and found that people generally shared five distinct types of information. Some talked about the raw facts of what happened, while others focused on their emotional reactions. Some discussed how to handle the situation or what the future might look like, and others described how their physical or mental state had changed. A few also expressed a resistance to talking at all. This initial step allowed the team to map the landscape of disclosure, moving beyond a simple "yes or no" to a rich inventory of content.

Using these findings, the team constructed a new questionnaire called the Content Repertoire of Event-Related Disclosure Inventory. They tested this tool with a large group of nearly 500 adults who had experienced a stressful event within the last decade. The participants filled out the survey twice, once at the start and again a month later, allowing the researchers to see if the tool produced consistent results over time. The analysis revealed that the twenty-five items on the questionnaire naturally grouped into three main categories. The first group combined discussions about facts and emotions, capturing the storytelling and feeling aspects of disclosure. The second group focused on handling the situation and looking ahead, representing problem-solving and future planning. The third group dealt with changes in condition, such as talking about physical symptoms or shifts in motivation. These three categories were found to sit under a single, broader umbrella of disclosure content, suggesting that while people share different things, these elements are part of one cohesive process.

The researchers then checked whether this new tool actually measured what it was supposed to measure by comparing it to other established psychological scales. They found that people who were willing to talk about their experiences tended to score higher on the new inventory, confirming that the tool aligns with the general attitude of openness. They also looked at how these scores related to coping strategies. Those who discussed facts, emotions, and future plans tended to use more active and constructive ways of dealing with stress, such as seeking support or making plans. In contrast, those who focused heavily on changes in their condition, like physical symptoms or loss of motivation, tended to use more avoidant coping methods. Most importantly, the study showed that knowing what specific content a person shared added new information to the prediction of their posttraumatic growth. Even when accounting for how often they thought about the event or how willing they were to talk, the specific mix of what they said helped explain why some people grew from the experience while others did not.

The study did find some limitations that suggest the work is ongoing rather than finished. For instance, the tool showed low stability over the one-month period, meaning a person's answers about what they discussed could change from one month to the next. The researchers suggest this is not a flaw in the tool but rather a reflection of reality: the content of our conversations about trauma is dynamic and shifts as we process our experiences. Furthermore, the tool was developed and tested only with Japanese adults, so it remains to be seen if these same categories apply in other cultures or languages. Despite these boundaries, the creation of this inventory marks a significant step forward. It provides scientists and clinicians with a way to look inside the black box of disclosure, distinguishing between the different kinds of stories people tell. By understanding that not all talking is the same, and that the specific mix of facts, feelings, and future plans matters, we gain a clearer picture of how human beings navigate the path from trauma to growth.