Mechanisms of Borderline Personality Disorder: The Role of Identity Diffusion
Abstract
Borderline personality disorder (BPD) is a disabling psychiatric condition that causes pervasive and enduring impairments in social and occupational functioning. Previous literature has outlined the core components of the disorder to include disturbances in affect regulation, identity problems, disrupted interpersonal relationships, and impulsive behavior. While several theories have postulated the primacy of one component in driving the remaining components, the etiological and maintaining mechanisms of BPD are poorly understood. Therefore, the present study examined the primacy of one of these components, identity disturbance, in eliciting changes in the affective, interpersonal, and impulsive components of the disorder. The current study employed an experimental manipulation of identity coherence in 388 undergraduates who were screened for high or low levels of borderline personality features. All participants completed measures of affect prior to and immediately following the manipulation and then completed a GoStop task of impulsivity and an interpersonal trust task in a counterbalanced order. The results suggest individuals with high levels of borderline personality features generally report reduced self-concept clarity and are more susceptible to efforts to alter the coherence of their identity than those with lower levels of borderline personality features. Destabilization of identity coherence led to greater difficulties inhibiting behavior in those with high levels…
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