Test-retest reliability of the diagnostic interview for borderlines.

Area of Science:

• Psychiatry
• Clinical Psychology
• Psychometrics

Background:

• The Gunderson Diagnostic Interview for Borderlines (DIB) is a widely used research tool.
• Previous research focused on interrater reliability, neglecting test-retest reliability and clinician variability.
• Assessing the DIB's reliability is crucial for its continued use in diagnosing borderline personality disorder.

Purpose of the Study:

• To evaluate the test-retest reliability of the DIB.
• To assess interrater reliability among clinicians using the DIB.
• To investigate the impact of clinician experience and sex on DIB scoring.

Main Methods:

• Trained clinicians administered the DIB to assess reliability.
• Interrater reliability was examined by comparing scores from different clinicians.
• Test-retest reliability was assessed by re-administering the DIB to the same individuals over time.

Main Results:

• The DIB demonstrated acceptable interrater and test-retest reliability when administered by trained clinicians.
• No significant differences in DIB scores were found based on interviewer sex.
• Less experienced clinicians tended to assign higher (more borderline) scores compared to more experienced clinicians.

Conclusions:

• The DIB is a reliable instrument for diagnosing borderline personality disorder, showing consistency across different raters and over time.
• Clinician experience is a factor influencing DIB scores, suggesting a need for standardized training.
• Further research should explore methods to mitigate the effect of clinician experience on diagnostic accuracy.