Cognitive characteristics of patients with borderline personality disorder: Development and validation of a self-report inventory

Internal consistency of the scale is excellent, Cronbach's α=0.91. One-week test-retest reliability was also high rtt=0.81. Good convergent and discriminant validity was obtained for correlation with SCID dimensional scores and discrimination of BDP patients and other clinical and non-clinical groups. A comparison of scores in a sample of 26 patients with BPD during crisis intervention and 8 months later indicated the sensitivity of the QTF to measure change over time. Overall, the questionnaire appears to be a methodologically sound measure, valuable for research purposes as well as in clinical practice.