The relation between epistemic trust and borderline pathology in an adolescent inpatient sample

Recent extensions of mentalization theory have included the hypothesis that a reduced capacity for epistemic trust in the context of attachment relationships may represent a core vulnerability for the development of borderline personality disorder (BPD). The first aim of the current study was to explore empirical relationships between epistemic trust and symptoms of BPD. The second aim was to explore the effect of epistemic trust on treatment response.

Data were collected from 322 inpatient adolescents. The Inventory of Parent and Peer Attachment (IPPA) trust in mother and father subscales were used to approximate epistemic trust in the absence of a validated measure. A multimodal approach was used to measure BPD including self-report, parent-report, and interviewer ratings. Regression analyses were performed to explore the relationship between IPPA trust scores and measures of BPD. Mixed-design analyses of variance were conducted to evaluate whether self-reported parent trust at admission influenced progress in treatment.

As hypothesized, results indicated that reduced IPPA trust in parents correlated with BPD symptoms across various measures. Levels of IPPA trust in parents at admission did not moderate a reduction in BPD symptoms over the course of treatment.

This study provides support for the theoretical association between deficits in epistemic trust and BPD while also highlighting the need for a validated measure of epistemic trust. Although parent trust at admission did not moderate a reduction in BPD symptoms over the course of treatment, this result may suggest that progress in treatment, and perhaps the ability to cultivate trust in the treatment setting and providers, may not be overly determined by levels of parent trust.