The "Lost" Personality Disorders and Their Relationships to the Alternative Model of Personality Disorders Among Older Adults

Four personality disorders (PD) have become "lost" throughout the various editions of the DSM: Depressive, Passive-Aggressive, Sadistic, and Self-Defeating. The Alternative Model of Personality Disorders (AMPD) is a novel approach to PD classification, containing two diagnostic criteria: personality functioning and pathological personality traits. This study identifies the personality functioning and pathological personality trait features of the Lost PDs among older adults (N = 202; M-age = 67.47 years). Results indicate that the Lost PDs related more strongly with the self-functioning domains (versus the interpersonal domains). Some pathological traits emerged in expected directions, whereas others did not, which is consistent with research on the traditional PDs. The AMPD appears to have mixed validity in capturing the Lost PDs in older adults, though overall it performed comparably well and warrants further examination.