Measuring irritability across childhood, adolescence, and young adulthood: an investigation of measurement invariance by age, sex, and informant.

ABSTRACT: Irritability is a transdiagnostic phenomenon, frequently present in youth mental health services, and associated with multiple adverse outcomes. Irritability research suggests developmental, sex, and informant differences, but robust assessment requires comparison of the same or equivalent measures. Studies on irritability measurement invariance (equivalence) across age, sex, and informant remain limited. This research investigated measurement invariance across age, sex, and informant (parent/self), in the Avon Longitudinal Study of Parents and Children. Primary analyses assessed age (N = 9,809) and sex (N = 9,803) invariance in irritability measured using the parent-rated Development And Well-Being Assessment (DAWBA) at ages 7-25, and informant invariance (parent- versus self-report) was

SUBMITTER: Bekiropoulou A 

PROVIDER: S-EPMC12916536 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature