Offspring irritability: associations with parental psychopathology and personality.

Although there are well-established correlates and outcomes of irritability, there are fewer studies reporting on predictors of the longitudinal course of irritability in youth. The current report examined parent internalizing and externalizing psychopathology and dimensions of personality as predictors of the developmental course of irritability in youth. Offspring irritability was assessed between ages 2 and 10 years using the Irritability Factor from the parent-reported Child Behavior Checklist (N = 570, 53.51% female). Parental psychopathology was assessed with a clinical interview; parents also completed the General Temperament Survey as a measure of personality. Results demonstrated that offspring irritability decreased with age. Offspring irritability was associated with parental depressive and anxiety disorders, higher levels of negative emotionality/neuroticism (NE) and disinhibition, and lower levels of positive emotionality; parental NE and disinhibition remained unique predictors of offspring irritability in a multivariate model. Finally, parental externalizing disorders were associated with more stable trajectories of offspring irritability, whereas offspring of parents without a history of externalizing disorders showed decreasing irritability across time. Findings demonstrate that different aspects of parental personality and psychopathology have differential impacts on levels and course of offspring irritability.