Personality Disorders: Theory, Research, and Treatment (Dec 6, 2018). DOI:10.1037/per0000316 Extant research has supported a connection between socialization in childhood and difficulties regulating emotions. The biosocial theory of borderline personality disorder (BPD; Crowell, Beauchaine, & Linehan, 2009; Linehan, 1993) suggests that emotion dysregulation is a core mechanism underlying the extreme behaviors, mood instability, identity disturbance, and relationship instability observed in BPD. The present study investigated the impact of socialization factors related to emotions, parental autonomy support, parental psychological control, and childhood trauma on BPD features in a nonclinical young adult sample (N = 357).. To read the full article, log in using your NHS OpenAthens details.