“…This finding thus supports the advancement towards an integrative view of effectiveness of psychotherapy for BPD (Bateman, Gunderson, & Mulder, 2015). The study highlights the potentially common mechanisms of change which may have been previously overlooked due to a focus on theory-consistent conceptualizations in process and outcome research Several candidates for such common, that means, transtheoretical mechanisms have been proposed, for instance mentalizing (Bateman, Campbell, Luyten, & Fonagy, 2017;DEFENSE MECHANISMS IN DIALECTICAL-BEHAVIOR THERAPY 15 Fischer-Kern et al, 2015), therapist's responsiveness (Kramer, 2017a), and rupture-repair episodes in the therapeutic alliance (Boritz, Barnhart, Eubanks, & McMain, 2018). Utilizing such transtheoretical concepts in studies of BPD treatments might be useful towards explaining currently unexplained variance related to partial response and dropout.…”