Evaluating Change in Transference, Interpersonal Functioning, and Trust Processes in the Treatment of Borderline Personality Disorder: A Single-Case Study Using Ecological Momentary Assessment.

Transference-focused psychotherapy (TFP) is an empirically supported treatment for borderline personality disorder (BPD) that improves functioning via targeting representations of self affectively relating to others, particularly as evoked in the therapeutic relationship. If change in TFP operates as theorized, then shifts in patterns of "self affectively relating to others" should be observed in the transference prior to shifts in daily relationships. Using ecological momentary assessment (EMA), a patient with BPD rated daily interpersonal events for 2-week periods during 18 months of TFP; at 9 and 18 months these ratings included interactions with the therapist. Results suggest that positive perceptions of her therapist that ran counter to her negatively biased perception in other relationships preceded changes in her perceptions of others. EMA shifts corresponded to improvements in self-reported symptoms, interview-based personality functioning, and therapist assessments. Implications for assimilation of a trusting experience with the therapist as a mechanism of change in TFP are discussed.