Reliability and Validity of the Japanese Version of the Short Form of the Expanded Version of the Posttraumatic Growth Inventory (PTGI-X-SF-J): A Cross-Sectional Study.

A Japanese version of the short form of the expanded Posttraumatic Growth Inventory (PTGI-X-SF-J) was developed in this study, as the extended version captures broader, more diverse personal growth perspectives, such as existential spiritual growth. We collected cross-sectional data from 408 (first sample) and 284 (second sample) Japanese university students using the expanded version of the Posttraumatic Growth Inventory (PTGI-X-J). Exploratory factor analysis (EFA) was performed with the first sample and confirmatory factor analysis (CFA) with the second; reliability and validity were examined. The short-form version resulting from the EFA and CFA comprised 10 items and five factors. Cronbach's alpha for the PTGI-X-SF-J total and subscale scores ranged from 0.671 to 0.875. The intraclass correlation coefficient for the total and subscale scores between the PTGI-X-J and PTGI-X-SF-J ranged from 0.699 to 0.821. Regarding external validity, no significant correlation was found between posttraumatic growth and posttraumatic stress disorder checklists. Due to its brevity, the PTGI-X-SF-J can help assess diverse spiritual and existential personal growth experiences among clients, patients, and trauma survivors while reducing physical and psychological burdens.

Influence of perceived trauma on the cognitive processing model of posttraumatic growth among university students.

This study examined whether perceiving an event as a trauma influenced a cognitive processing model explaining posttraumatic growth (PTG). A cross-sectional questionnaire survey was conducted with 311 university students from eight universities in Japan. The participants provided information about the most stressful event they had experienced and completed the expanded version of the PTG Inventory, Core Belief Inventory, Event Related Rumination Inventory, and Cognitive and Emotional Processing from Disclosure Inventory. A multi-group structural equation modeling was conducted by dividing the participants into two groups depending on whether they identified the most stressful event as a trauma. The model with no constraint showed a good fit. The model with partial constraint showed a better fit than the models with no constraint or full constraint. The difference of the model was seen as a covariance between the Event Related Rumination Inventory and the Cognitive and Emotional Processing from Disclosure Inventory. The results demonstrated configural invariance and partial metric invariance. This indicated that PTG would be recognized irrespective of whether the event was perceived as a trauma. This study also indicated that different factors out of the model could be associated with the ruminative process and disclosure process. The importance of focusing on the process of PTG, regardless of an individual's perception of the event, was emphasized, especially for factors related to rumination and disclosure.