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Attachment, depression, and cortisol: Deviant patterns in insecure-resistant and disorganized infants
Maartje P C M Luijk1, Nathalie Saridjan, Anne Tharner
1Center for Child and Family Studies, Leiden University, Leiden, the Netherlands.
Developmental Psychobiology
|June 29, 2010
Summary
Infant attachment insecurity and maternal depression impact infant stress responses. Insecure-resistant infants with depressed mothers showed heightened cortisol reactivity, while disorganized infants had flatter cortisol patterns.
Area of Science:
- Developmental Psychology
- Maternal Mental Health
- Infant Neuroendocrinology
Background:
- Attachment insecurity and maternal depression are linked to infant regulatory issues.
- Cortisol stress reactivity and diurnal rhythm are key physiological markers of infant regulation.
- Understanding these factors is crucial for early intervention strategies.
Purpose of the Study:
- To investigate the combined effects of infant attachment insecurity and maternal depression on infant cortisol stress reactivity and diurnal rhythm.
- To examine attachment classifications using the Strange Situation Procedure (SSP) and maternal depression via the Composite International Diagnostic Interview (CIDI).
- To explore findings within a cumulative risk model framework.
Main Methods:
- Prospective cohort study of 369 mother-infant dyads.
- Assessment of infant attachment at 14 months using the Strange Situation Procedure (SSP).
- Measurement of infant cortisol stress reactivity (pre- to post-SSP) and diurnal rhythm.
- Prenatal diagnosis of maternal lifetime depression using the Composite International Diagnostic Interview (CIDI).
Main Results:
- Insecure-resistant infants exhibited the greatest cortisol increase post-SSP, particularly when mothers were depressed.
- Disorganized infant attachment was associated with a more flattened diurnal cortisol pattern compared to non-disorganized infants.
- These findings suggest a cumulative impact of maternal depression and insecure attachment on infant physiological regulation.
Conclusions:
- Infant attachment security and maternal mental health significantly influence infant stress regulation.
- A cumulative risk model effectively explains the combined impact of these factors on infant cortisol patterns.
- Early identification and support for at-risk dyads are essential for promoting healthy infant development.
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