Psychometric performance of the ultra-short version of the post-traumatic growth inventory in Peruvian adults during the Post-Pandemic: Analysis from Item Response Theory and SEM models
Author(s)
Samy Luana Huerta Estrada
Rose Wytske Barbaran Alvarado
MARIA CALIZAYA ANAHUA
Estefany Rojas Mendoza
Vaneryn Alania Marin
Date Issued
20 de diciembre de 2025
Type
Article
Volume
1
Abstract
Objective: This study aimed to study the psychometric functioning of the ultra-short version of the Posttraumatic Growth Inventory through the Item Response Theory (IRT) and evaluate the Differential Item Functioning (DIF). Method: 404 Peruvian adults of both sexes (65.8% women and 34.2% men) between 18 and 58 years (M = 24.3, SD = 7.9) participated. The Brief Resilient Coping Scale and the General Well-being Index (WHO-5) were also applied. Results: All the items present adequate discrimination and difficulty indices. Also, it was found that item 1 presents DIF between the group of men and women. On the other hand, it was found that resilience significantly predicts posttraumatic growth (.50; p < .01) and, in turn, posttraumatic growth significantly predicts psychological well-being (.40; p < .01). Conclusions: The ultra-short version shows adequate psychometric functioning and is, therefore, a helpful tool that allows obtaining valid and reliable interpretations of posttraumatic growth.
Subjects