Individuals suffering from borderline personality disorder (BPD) show a pervasive sense that others cannot be trusted, are vulnerable to negative therapeutic reactions, and can oscillate between idealized and persecutory interactions with others. These trust processing impairments impact both the immediate and wider social milieu of individuals with BPD, including therapist-patient interactions. Recently, research started unraveling the social-cognitive mechanisms of these impairments in BPD. In this Special Issue, we attempt to close the gap between research findings and clinical theories on trust processing impairment in BPD. The first section includes five original studies on trust processing in BPD. The second section includes five articulations of trust processing impairment as a treatment target in evidence-based treatments for BPD and as an indispensable "common factor" in the treatment of BPD. These cutting-edge research and clinical contributions advance a potential integrative, clinical science framework for conceptualizing and intervening effectively with those who struggle with BPD.
Keywords: borderline personality disorder; evidence-based treatments; psychotherapy; trust.