Identity disturbance in dimensional and categorical models of personality disorder: The incremental value of self-rated identity and narrative identity.

Identity disturbance is increasingly considered to drive personality disorder (PD) onset. Previous research has investigated how identity relates to PD using either self-report scales or narratives to assess identity. Few studies have investigated how both operationalizations relate to one another and to models of PD. More so, no study has investigated whether a narrative identity assessment offers additional explanatory power in understanding PD, beyond what is captured by a self-rated identity assessment, or vice versa. We aimed to address these gaps by administering a rating scale measuring (mal)adaptive identity alongside a prompt to write a narrative about a turning point event to 331 individuals aged 18-30 (72.2% female,