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The effect of prenatal substance use and maternal contingent responsiveness on infant affect
Jean Lowe1, Fares Qeadan2, Lawrence Leeman3
1Department of Pediatrics, University of New Mexico, Albuquerque, NM, USA.
Insights
Maternal responsiveness significantly impacts infant affect more than prenatal substance exposure. Focused parenting strategies can be key for interventions to improve infant neurobehavioral outcomes.
Area of Science:
- Developmental Psychology
- Neuroscience
- Maternal-Infant Interaction
Background:
- Prenatal substance exposure effects on infant neurobehavior are difficult to isolate from postnatal environmental influences.
- Parenting style, specifically maternal contingent responding, is a critical factor in infant development.
- The Still-face paradigm (SFP) is a valuable tool for assessing infant responses to social stressors.
Purpose of the Study:
- To investigate the distinct contributions of prenatal substance use and maternal parenting style on infant affect.
- To quantify the impact of maternal contingent responding during social interaction on infant emotional expression.
- To disentangle the effects of prenatal exposures from postnatal environmental factors in shaping infant neurobehavioral outcomes.
Main Methods:
- A prospective cohort study involving 91 mother-infant dyads.
- Classification into four groups: Control, Medication Assisted Therapy (MAT), Alcohol exposure, and Alcohol+MAT exposure.
- Utilized the Still-face paradigm (SFP) at 6 months to assess infant affect and maternal responsiveness, analyzed with MANOVA and mixed effects modeling.
Main Results:
- Maternal contingent responding positively predicted infant positive affect (β̂=0.84; p<0.0001).
- Maternal attention seeking negatively predicted infant positive affect (β̂=-0.78; p<0.0001).
- Maternal responsiveness explained 67.1% of infant positive affect variability, significantly more than prenatal exposures (15.8%).
Conclusions:
- Maternal responsiveness is a substantially stronger predictor of infant behavior than prenatal exposures.
- Parenting interventions focusing on enhancing maternal responsiveness show promise for improving infant outcomes.
- Findings support targeted parenting strategies to mitigate potential negative effects of prenatal exposures.
Background:
The effects of prenatal substance exposure on neurobehavioral outcomes are inherently confounded by the effects of the postnatal environment, making it difficult to disentangle their influence. The goal of this study was to examine the contributing effects of prenatal substance use and parenting style (operationalized as contingent responding during the play episodes of the Still-face paradigm [SFP]) on infant affect.
Methods:
A prospective cohort design was utilized with repeated assessment of substance use during pregnancy and the administration of the SFP, which measures infant response to a social stressor, at approximately 6months of age. Subjects included 91 dyads classified into four groups: 1) Control (n=34); 2) Medication assisted therapy for opioid dependence (MAT; n=19); 3) Alcohol (n=15); 4) Alcohol+MAT (n=23). Mean % of positive infant affect and mean % of maternal responsiveness (watching, attention seeking, and contingent responding) was compared among the five SFP episodes across the four study groups by MANOVA. Mixed effects modelling was used to estimate the contributing effects of the study groups and maternal responsiveness on infant affect.
Results:
Maternal contingent responding was associated with increase (β̂=0.84; p<0.0001) and attention seeking with decrease (β̂=-0.78; p<0.0001) in infant positive affect. The combined effect of prenatal exposures and covariates explained 15.8% of the variability in infant positive affect, while the model including contingent responding and covariates explained 67.1% of the variability.
Conclusions:
Higher maternal responsiveness was a much stronger predictor of infant behavior than prenatal exposures, providing the basis for future intervention studies focusing on specific parenting strategies.
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