Mentalization-Based Treatment with and without Competitive Memory Training for patients with Borderline Personality Disorder: randomized controlled trial

INTERVENTION: MBT(Mentalization Based Treatment) + COMET (Competitive Memory Training; intervention specifically targeting low self‐esteem) Control: MBT (Mentalization Based Treatment) + Music therapy CONDITION: Borderline personality disorder ; ; PRIMARY OUTCOME: BPDSI score (Borderline Personality Disorder Severity Index) SECONDARY OUTCOME: Depression (BDI‐II score: Beck Depression Inventory) ; Psychiatric symptoms (BSI score: Brief Symptom Inverntory) ; Interpersonal problems (IPP‐S score: Inventory of Interpersonal Problems‐Short Form) ; ; Self esteem problems (RSES score: Rosenberg Self Esteem Scale) ; ; Self esteem instability (SEIS score: The Self‐Esteem Instability Scale) ; ; Implicit Self esteem (IAT score: Implicit Association Test Self‐esteem) ; ; Attachment (ECR‐R score: Experiences in Close Relationships‐Revised) ; ; TAT score (Thematic Apperception Test) INCLUSION CRITERIA: 1. Patients are registered with the Rivierduinen care program ‘Personality Disorders’. 2. Aged between 18 and 65 years. 3. Confirmation of the primary diagnosis of borderline personality disorder using the International Personality Disorder Examination (IPDE) for DSM‐IV. 4. BPDSI‐IV score = 20. 5. Informed consent.