Objectives:
The aim of the study was to develop the Polish version of the Structured Interview for Personality Organization (STIPO-R-PL), conduct a preliminary assessment of its psychometric properties (interrater reliability, internal consistency, and validity), and disseminate knowledge about the tool among professionals working with patients with personality disorders.

Methods:
Trained psychotherapists conducted STIPO-R-PL interviews with 104 patients aged 18–64 years (68.3% women). Additionally, data were collected using the Structured Clinical Interview for DSM-5 Personality Disorders (SCID-5-PD) and self-report questionnaires, including the Symptom Checklist (SCL-90-R) and the Borderline Personality Inventory (BPI).

Results:
The findings indicate that STIPO-R-PL allows for consistent evaluations by independent, trained raters. The tool demonstrates acceptable reliability (with the exception of the mature defense mechanisms subscale). STIPO-R-PL scores correlate positively with both self-reported dimensions of personality pathology and the severity of psychopathological symptoms. Furthermore, patients meeting the diagnostic criteria for personality disorders (based on the clinical interview) obtain statistically significantly higher scores across all STIPO-R-PL dimensions compared to those who do not meet the criteria, with effect sizes in the medium range. These results support the validity of the interview

Conclusions:
We recommend STIPO-R-PL for further testing in clinical practice (psychotherapy and supervision) as well as for future research aimed at a more comprehensive evaluation of its psychometric properties and diagnostic utility