Expanded version of the Posttraumatic Growth and Depreciation Inventory: Scale validation and refinement among Italian adults

Clinical Impact Statement This study supports the use of PTGDI-X in the Italian population, suggesting that it could be considered a valid instrument to evaluate both the positive and negative outcomes of a traumatic event. Indeed, from a clinical point of view, the assessment of both psychological dimensions may allow clinicians to help traumatized individuals give meaning to their life and reappraise their core beliefs, in order to improve their psychological well-being.Objective: The main aim of this study was to investigate the psychometric properties of the Italian version of the newly-developed Posttraumatic Growth and Depreciation Inventory (PTGDI-X) in a heterogeneous sample of Italian adults who had experienced a traumatic event. Method: The instrument was translated following the forward-backward method and completed by 601 participants who met the inclusion criteria. The factorial structure of the PTGDI-X was assessed by means of multiple confirmatory factor analyses (CFA). Convergent and discriminant validity and reliability were also evaluated. Results: The results of the CFA revealed that the original 5-factor model was the best fit for the growth (PTG) dimension of the PTGDI-X, whereas it poorly fit the data with respect to the depreciation (PTD) component. With regard to convergent and divergent validity, positive correlations were found between the PTG scores and the core belief disruption and rumination scores, whereas the PTG factors correlated negatively with depressive and posttraumatic symptom measures. Conversely, positive correlations were identified between the PTD total score and all the other investigated constructs. Finally, the total scales and subscales of the PTG/PTD dimensions revealed good to excellent internal consistency. Conclusions: The current findings indicate that the Italian version of the PTGDI-X appears to be a valid assessment tool for the multidimensional structure of the PTG component. Future research is needed, on the other hand, to confirm the validity of the PTD dimension in the Italian population.