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Biobehavioral comparisons between adopted and nonadopted rhesus monkey infants
M Champoux1, W T Boyce, S J Suomi
1Laboratory of Comparative Ethology, National Institute of Child Health and Human Development, Bethesda, Maryland, USA.
Journal of Developmental and Behavioral Pediatrics : JDBP
|February 1, 1995
Summary
Adoption in rhesus monkeys showed no significant differences in infant or maternal behaviors, or stress responses. This suggests adoption does not negatively impact development or mental health outcomes.
Area of Science:
- Primate behavior
- Developmental psychology
- Neuroendocrinology
Background:
- Previous research suggests potential behavioral and mental health differences in adopted individuals.
- Understanding the impact of early life experiences, such as adoption, is crucial for developmental studies.
Purpose of the Study:
- To investigate the behavioral and neuroendocrine differences between adopted and nonadopted rhesus monkey mother-infant pairs.
- To assess the impact of biological versus adoptive maternal care on infant development and stress responses.
Main Methods:
- Experimentally allocated newborn rhesus monkeys to biological or adoptive mothers for postnatal care.
- Conducted behavioral observations during neonatal period, separations (30 days, 5 months), and social housing (6-18 months).
- Assessed maternal and infant responses to separation stress via behavioral, adrenocortical, and growth hormone reactivity.
Main Results:
- Only six out of 84 comparisons were statistically significant, consistent with chance findings.
- No significant differences were observed in behavioral or neuroendocrine measures between adopted and nonadopted mother-infant pairs.
- Maternal and infant responses to separation stress were comparable across groups.
Conclusions:
- Adoption in rhesus monkeys does not lead to significant behavioral or neuroendocrine differences compared to nonadopted pairs.
- Findings support human studies indicating no increased risk for mental disorders in adopted children.
- Early maternal care type (biological vs. adoptive) had negligible impact on infant development and stress reactivity in this model.