Personality disorders (PDs) are a diverse group of mental health disorders characterized by inflexible and enduring patterns of maladaptive behavior, cognition, and affect that are stable across different experiences. Two separate models for the diagnosis of these disorders are presented in the American Psychiatric Association’s (APA) Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5): (1) a traditional model, which mirrors the same PD criteria and organization found in the DSM-IV, and (2) a proposed alternative model (AM) that is concerned with dimensionality over categorical diagnosis. Both models represent two sides of an ongoing debate in the personality literature. Should PD diagnosis be based on the tradition of clinical expertise characterized by delineated diagnostic categories, or should the system be reformed to reflect more ...