“Borderline” is likely an “identity” or “emotional” disorder, but definitely not a “personality” disorder: A commentary on Sharp et al. (2026)

In a 17-year longitudinal study, Sharp et al. (2026) report that “self-functioning” outperforms “interpersonal functioning” in predicting later borderline pathology, concluding that the core and distinguishing features of “personality disorder” lie in the “representation of self”. In this commentary