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Infant pathways to externalizing behavior: evidence of Genotype x Environment interaction

Leslie D Leve1, David C R Kerr, Daniel Shaw

  • 1Oregon Social Learning Center, Eugene, OR 97401, USA. lesliel@oslc.org

Child Development
|March 25, 2010
PubMed

Insights

Infants at genetic risk for externalizing problems showed heightened attention to frustration when adoptive mothers had more anxious and depressive symptoms. This highlights the impact of early experiences and maternal affect dysregulation.

Area of Science:

  • Developmental Psychology
  • Behavioral Genetics
  • Child Psychiatry

Background:

  • Early experiences significantly shape infant development and behavior.
  • Understanding precursors to externalizing problems is crucial for early intervention.
  • Adoption studies provide unique insights into gene-environment interactions.

Purpose of the Study:

  • To investigate the predictive role of genetic risk and parental affect dysregulation on infant attention to frustration.
  • To examine the interaction between genetic risk and adoptive mother's emotional symptoms in predicting infant behavior.
  • To explore the influence of prenatal substance use on these relationships.

Main Methods:

  • Observation of 348 infant-parent triads during a frustration task.
  • Assessment of genetic risk for externalizing problems in infants.
  • Evaluation of adoptive mothers' affect dysregulation (anxious and depressive symptoms).
  • Consideration of substance use during pregnancy.

Main Results:

  • Adoptive mother's affect dysregulation moderated the effect of genetic risk.
  • Infants at genetic risk displayed heightened attention to frustration specifically when mothers reported higher anxious and depressive symptoms.
  • The genotype x environment interaction persisted even when accounting for prenatal substance use.

Conclusions:

  • Maternal affect dysregulation is a significant moderator in the development of infant attention to frustration, particularly for infants at genetic risk.
  • This suggests a gene-environment interplay where maternal emotional state influences how infants process frustrating stimuli.
  • Findings underscore the importance of maternal well-being in mitigating risks for externalizing problems in adopted children.

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