Aim of the study:
The most widely-used tool for assessing positive psychological changes following trauma is the 21-item Posttraumatic Growth Inventory (PTGI), developed by Tedeschi and Calhoun in 1996; a Polish adaptation has been available since 2010. In 2010, Cann and colleagues introduced the short form of the inventory (PTGI SF). The aim of the present article is to describe the psychometric properties of a Polish version of the PTGI SF.

Subject or material and methods:
The analysis was based on data from 1,004 individuals exposed to various forms of traumatic events, either directly or indirectly. All respondents completed the PTGI SF, consisting of 10 items. Moreover, to confirm the validity of the PTGI-SF selected groups were administered the other tools, i.e.: PCL-5; CPOTS; ERRI; CBI; RMS-25; SDQ.

Results:
The inventory demonstrated high reliability, comparable to that of the full Polish version and similar to that of the original instrument. It was found to demonstrate a four factor structure, consistent with the Polish full version, accounting for 75.71% of the total variance. Sten norms were established separately for men and women.

Discussion:
The vast majority of studies using the PTGI focus primarily on the total score; in such cases, the short version of the inventory serves as a suitable and comparable substitute. However, when the goal is to examine and compare the specific components of PTG, it is preferable to use the full version of the PTGI.

Conclusions:
The PTGI SF was found to provide a reliable overall score and be easily administered in clinical and research settings.