Interpersonal Trust in Adolescents With Borderline Personality Disorder: Comparisons With Healthy and Psychiatric Controls.

The aim of the current study was to utilize a well-known trust versus lottery paradigm to evaluate interpersonal trust in adolescents with borderline personality disorder (BPD). The study included 126 healthy controls, 59 inpatient adolescents with a diagnosis of BPD, and 137 inpatient adolescents without BPD. Alongside diagnostic measures, a questionnaire-based measure for assessing trust beliefs was administered to probe group differences in trust beliefs and associations between game behavior and trust beliefs. No main effect for group or condition was found. A significant interaction of trial and group was noted, suggesting that across games, psychiatric controls demonstrated the steepest increase in trust over time, followed by the BPD and healthy control groups. Healthy controls evidenced significantly higher levels of trust beliefs compared to BPD and psychiatric controls. Reasons for nonreplication of previously demonstrated anomalous game behavior in adults in this adolescent sample are discussed.