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A genetically informed longitudinal study of early-life temperament and childhood aggression

Penichet, Eric N., Beam, Christopher R., Luczak, Susan E., Davis, Deborah W.·2025·Development and Psychopathology

Abstract

The present study examined the longitudinal associations between three dimensions of temperament – activity, affect-extraversion, and task orientation – and childhood aggression. Using 131 monozygotic and 173 dizygotic (86 same-sex) twin pairs from the Louisville Twin Study, we elucidated the ages, from 6 to 36 months, at which each temperament dimension began to correlate with aggression at age 7. We employed latent growth modeling to show that developmental increases (i.e., slopes) in activity were positively associated with aggression, whereas increases in affect-extraversion and task orientation were negatively associated with aggression. Genetically informed models revealed that correlations between temperament and aggression were primarily explained by common genetic variance, with nonshared environmental variance accounting for a small proportion of each correlation by 36 months. Genetic variance explained the correlations of the slopes of activity and task orientation with aggression. Nonshared environmental variance accounted for almost half of the correlation between the slopes of affect-extraversion and aggression. Exploratory analyses revealed quantitative sex differences in each temperament-aggression association. By establishing which dimensions of temperament correlate with aggression, as well as when and how they do so, our work informs the development of future child and family interventions for children at highest risk of aggression.

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Metadata

Authors
Penichet, E. N., Beam, C. R., Luczak, S. E., & Davis, D. W.
Venue
Development and Psychopathology
Published
2024-04-01
Volume
37
Issue
2
Pages
779-801
ISSN
  • 0954-5794
  • 1469-2198
Cited by
2
References
11
Language
en

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CoChat. (2026). Citation check: A genetically informed longitudinal study of early-life temperament and childhood aggression. https://app.cochat.ai/papers/10.1017/s0954579424000634
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Penichet, E. N., Beam, C. R., Luczak, S. E., & Davis, D. W. (2025). A genetically informed longitudinal study of early-life temperament and childhood aggression. Development and Psychopathology. https://doi.org/10.1017/s0954579424000634