Dialectical behavior therapy (DBT) can be considered a well-established treatment for borderline personality disorder (BPD) as evidenced by seven well-controlled randomized clinical trials across four independent research teams. The primary purpose of this article is to address a variety of potential mechanisms of change that may be associated with those aspects of DBT that are unique to the treatment and its theoretical underpinnings. Based on the biosocial theory of BPD, many of these mechanisms can be distilled down to the following process: the reduction of ineffective action tendencies linked with dysregulated emotions. Specifically we address the following interventions and associated mechanisms of change: mindfulness, validation, targeting and chain analysis, and dialectics. Patient change in BPD is conceptualized primarily as helping the patient to engage in functional, life-enhancing behavior, even when intense emotions are present. Ultimately, our goal was to provide guidance for theoretically and empirically grounded research on the mechanisms of change in DBT.
Despite the prominent role of emotion dysregulation in theoretical accounts of borderline personality disorder (BPD), few studies have examined emotion dysregulation in BPD. This study extends extant research by providing an experimental investigation of emotion dysregulation among outpatients with BPD. Specifically, this study modified an experimental measure of distress tolerance to examine differences between outpatients with BPD (n = 17) and those without a personality disorder (n = 18) in 2 aspects of emotion dysregulation: (a) the unwillingness to experience emotional distress in order to pursue goal-directed behavior and (b) the inability to engage in goal-directed behavior when distressed. As hypothesized, BPD participants were less willing to experience distress in order to pursue goal-directed behavior. However, BPD participants did not evidence greater difficulties engaging in goal-directed behavior when distressed. Results highlight directions for future research and suggest that particular aspects of emotion dysregulation may be more or less relevant to BPD.
Individuals with borderline personality disorder (BPD) have been hypothesized to exhibit significant problems associated with emotional sensitivity. The current study examined emotional sensitivity (i.e., low threshold for recognition of emotional stimuli) in BPD by comparing 20 individuals with BPD and 20 normal controls on their accuracy in identifying emotional expressions. Results demonstrated that, as facial expressions morphed from neutral to maximum intensity, participants with BPD correctly identified facial affect at an earlier stage than did healthy controls. Participants with BPD were more sensitive than healthy controls in identifying emotional expressions in general, regardless of valence. These findings could not be explained by participants with BPD responding faster with more errors. Overall, results appear to support the contention that heightened emotional sensitivity may be a core feature of BPD.
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