I want to first define Borderline Personality Disorder (BPD) : BPD is characterized by persistent and pervasive cognitive, emotional, and behavioral dysregulation, is among the most severe and perplexing behavioral disorders. It impacts the way you think and feel about yourself and others, causing problems functioning in everyday life. It includes a pattern of unstable intense relationships, distorted self-image, extreme emotions and impulsiveness.
The biosocial theory in context of borderline personality disorder was developed to guide treatment strategies and therefore concentrates primarily on links between emotional experience and behavior. Biosocial theory describes personality disorders as biologically-determined personality traits reacting to environmental stimuli. Accordingly, therapeutic strategies (Dialectical Behavioral Therapy) modifying any component of emotional experience were found to change functioning across all associated feeling states and behaviors.
I have found in my practice that the introduction of the biosocial theory to the client validates their experience and helps them understand and accept themselves for who they are.