POLISH VERSION OF WHITE BEAR SUPPRESSION INVENTORY (WBSI) BY WEGNER AND ZANAKOS: FACTOR ANALYSIS AND RELIABILITY.

OBJECTIVES: The main aim of this study was to adapt a Polish version of the White Bear Suppression Inventory (WBSI), originally created by Wegner and Zanakos (1994) to measure chronic suppression. METHODS: The Polish version of the WBSI was prepared following the back-translation procedure. The scale was administered to 246 individuals from general population. Then, factor structure analysis of the WBSI was conducted. Finally, reliability analysis of the Polish version of the WBSI and its two sub-scales was done. RESULTS: The Polish version of the WBSI yielded satisfactory psychometric properties. The results from the explanatory factor analysis indicated a two-factor structure of the WBSI inventory including factorsof 'suppression' and 'intrusions'. The psychological measures with both factors as well as measures based on the total WBSI scores show very high reliability. CONCLUSIONS: The reliability of the Polish version of the WBSI is comparable to the original version. The analysis allowed us to identify a new subscale that may represent the experience of intrusions. The Polish version of the WBSI is characterized by good psychometric properties and may be used to assess intrusions and suppression.