This video describes potential subtypes of borderline personality disorder. The research on borderline personality disorder has inconsistent results in terms of the attempts identify subtypes. In the Diagnostic and Statistical Manual (DSM), there are no subtypes reported for borderline personality disorder. In one study from 2013, three subtypes were identified: core borderline personality, extrovert/externalizing, and schizotypal/paranoid. There were five times as many people in the core borderline personality than in the extrovert/externalizing category and there were ten times as many in the extrovert/externalizing category as in the schizotypal/paranoid category. With core borderline personality, we see that this particular presentation is really what we think of when we think of borderline personality. This particular presentation was absent a lot of other personality disorder dimensions and individuals in this group had lower levels of childhood trauma, which was a bit of a surprising finding. It’s important to keep in mind though that with these participants, trauma was high in general, so there were only lower levels of trauma in this first potential subtype relative to the other subtypes. With the extrovert/externalizing subtype, men were over-represented. There were more men in this category proportionally than we saw in the other categories. There was a higher quality of life. Also, there were features from other personality disorders including narcissistic, antisocial, and histrionic. This group had a higher level of childhood trauma relative to the other two groups. The last potential subtype was schizotypal/paranoid. There were also personality disorder features, and as is indicated by the name, they were schizotypal and paranoid personality disorder features. The participants in this category also had higher levels of social isolation, higher levels of attachment anxiety, lower levels of self-confidence, and lower levels of assertiveness.