Treating emotion dysregulation in patients with borderline personality disorder using imagery rescripting: A two-session randomized controlled trial.

Studies on Emotionally Dysregulated Behavior (EDB) demonstrated that the conduct thereof is associated with emotion dysregulation and preceded by mental imagery of EDB, which can direct future behavior. These findings are specifically important within the context of Borderline Personality Disorder (BPD), where emotion dysregulation and EDB are at the core of the disorder. The present study aims to evaluate the efficacy of imagery rescripting (IR) in treating emotion dysregulation associated with EDB in patients diagnosed with BPD. Forty-eight females diagnosed with BPD were randomly allocated to the IR intervention or treatment-as-usual group. Assessment took place one week before the first treatment session, as well as one week, and twelve weeks after the last treatment session evaluating emotion regulation strategies, borderline-symptomatology, EDB, depressiveness, impulsivity, mental imagery, and illness severity. Within-, and between subject, intention-to-treat-, and per-protocol analysis were conducted. Results showed decreased maladaptive emotion regulation strategies and increased adaptive emotion regulation strategies within the intervention group. Borderline-symptomatology improved immediately after treatment for the intervention group. Additionally, BPD patients within the intervention group improved regarding their impulsivity, depressiveness, and EDB symptomatology in comparison to patients in the TAU group. The presented intervention has proven to be effective in improving BPD-related symptomatology, such as emotion regulation, EDB, depressiveness, and impulsivity. Imagery rescripting could be routinely applied when EDB related images are present. TRIAL REGISTRATION: German Clinical Trials Registry (DRKS) ID: DRKS00010620.