Validation of the Post-Traumatic Growth Inventory-Short-Form (PTGI-SF) in Diverse Trauma-Exposed Samples

Objectives Although the Post-Traumatic Growth Inventory-Short Form (PTGI-SF) has been validated in several languages, it has not yet been validated in Greek. This study aimed to validate the Greek PTGI-SF in a large community sample and assess its comparability with the original PTGI, as well as its applicability in small, homogeneous trauma-exposed groups. Methods The validation process involved 2,138 Greek residents who experienced the COVID-19 lockdown. Results The PTGI-SF demonstrated a robust five-factor structure, gender invariance, and strong psychometric properties. It was further tested in four small samples exposed to specific traumatic events (fire/explosion, physical assault, sexual assault, and life-threatening illness/injury). Conclusions Results confirmed that the Greek PTGI-SF is a reliable and valid multidimensional tool, comparable to the full version. It showed configural and metric gender invariance and proved suitable for both large and small samples. This validated version supports the assessment of post-traumatic growth in Greek-speaking populations worldwide and facilitates targeted psychological interventions.