Journal of Consulting and Clinical Psychology85.5 (May 2017): 530-535. Background: Difficulty in emotion regulation is a hallmark feature of patients with borderline personality disorder (BPD). Therefore, change in the frequency of certain patients' coping strategies—aiming at emotion regulation—are among the most promising mechanisms of change in treatments for BPD. In parallel, it was highlighted that therapist responsiveness significantly contributed to outcome across treatment approaches (Stiles, 2009). To read the full article, log in using your NHS OpenAthens details.