Minding mentalizing - convergent validity of the Mentalization Breakdown Interview.

Area of Science:

• Psychiatry
• Psychology
• Clinical Research

Background:

• Mentalizing difficulties are central to borderline personality disorder (BPD).
• Assessing mentalizing capacity is crucial for BPD treatment but lacks validated, time-efficient tools.
• The Mentalization Breakdown Interview (MBI) was developed to address this gap.

Purpose of the Study:

• To investigate the convergent validity of MBI-based reflective functioning (MBI-RF) ratings against the gold standard Adult Attachment Interview (AAI-RF).
• To explore the relationship between MBI-RF and core BPD symptoms, functional impairment, and symptom distress.

Main Methods:

• Forty-five patients with BPD or BPD traits were assessed.
• Reflective functioning was rated using both the MBI (MBI-RF) and AAI (AAI-RF) based on the Reflective Functioning Scale.
• Correlations between MBI-RF and AAI-RF, and their associations with various clinical measures were analyzed.

Main Results:

• A high correlation (0.79, p<0.01) was found between MBI-RF and AAI-RF, supporting convergent validity.
• Few significant associations were observed between MBI-RF/AAI-RF and the clinical measures of BPD symptoms, functional impairment, or distress.

Conclusions:

• The MBI is a valid and reliable tool for assessing reflective functioning in BPD.
• The MBI offers a time-saving alternative for research on borderline personality disorder treatment.
• MBI-RF and AAI-RF measures appear distinct from core clinical symptoms in BPD.