Who, how, and when? New perspectives on longstanding issues in the study of externalizing psychopathology.

This special issue of Personality Disorders: Theory, Research, and Treatment aimed to provide methodologically robust research conducted across the globe that addressed a variety of questions related to externalizing psychopathology across the lifespan. Across all included articles are examples of sophisticated statistical approaches or innovative methods, including articles that evaluate the psychometrics of different structural models of externalizing psychopathology, test the invariance of indicators of externalizing problems over time or across different racial/ethnic groups, and leverage experience sampling methodologies. In what follows, we provide a brief overview of each of the eight articles included in this special issue. (PsycInfo Database Record (c) 2025 APA, all rights reserved).