In the years since the publication of the Diagnostic and Statistical Manual for Mental Disorders, Fifth Edition (DSM-5; American Psychiatric Association, 2013), considerable progress has been made in understanding the structure of the traits included in the Alternative Model of Personality Disorders (AMPD) in adulthood. In the next phase of research, the structure of the pathological trait model needs to be established more firmly in adolescence as well. There is promising evidence from studies of the Personality Inventory for DSM-5 (PID-5; Krueger et al., 2012) that the structure of pathological traits in adolescents shows considerable overlap with the structure in adult samples, but it is premature to conclude that the structure is entirely the same. To make additional progress in assessing personality pathology in youth, measures should be developed in multiple formats and for multiple informants; normal-range personality trait constructs should be included in measures for research and clinical use in young people; and research should incorporate Clark and Watson's (2022) recommendations to add new facets and the domain of Anankastia to adolescent measures of personality pathology. Adolescents stand to benefit from a trait taxonomy in the AMPD that more explicitly includes them. (PsycInfo Database Record (c) 2022 APA, all rights reserved).