To measure individual differences in borderline personality organization, we used the Polish translation of the measure [27 (link)] The short version consists of 20 dichotomous items (true or false). It is based on Kernberg’s [28 (link)] concept of borderline personality, but the diagnostic criteria are compatible with both the DSM-IV and Gunderson and Kolb’s [29 ] concept of BPD. In our studies, items were summed (Cronbach’s α = .87) and had good internal consistency as with previous research [30 ].
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