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Factors Contributing To Premature Maternal Rejection And Its Effects On Offspring, Ashley Mariah Sproul Bassett
Factors Contributing To Premature Maternal Rejection And Its Effects On Offspring, Ashley Mariah Sproul Bassett
Theses and Dissertations
Typically, rhesus mothers begin rejecting their infants' attempts to nurse when the infants are approximately three months of age in order to begin the process of weaning. A small subgroup of mothers begin rejecting their infants earlier, at one or two months of age, typically before infants seek and maintain independence from their mother. The effects of this early maternal rejection on the development of infants and some potential factors that contribute to premature maternal rejection were explored in this study. Infants who were rejected early were hypothesized to subsequently spend less time in positive contact with their mother, have …
Comparison Of Adoptive Vs. Biological Mother-Infant Relationships In Nonhuman Primates, Rachel Ann Bogh
Comparison Of Adoptive Vs. Biological Mother-Infant Relationships In Nonhuman Primates, Rachel Ann Bogh
Theses and Dissertations
Studies suggest that adoptees are at risk for a number of psychopathological behaviors. To understand the etiology of this risk, 150 socially housed rhesus macaques were studied, including 107 infants reared with their biological mothers and 43 infants reared with unrelated adoptive mothers. Mother-infant behaviors were recorded across the first 6 months of life. Analyses were performed using a hierarchical linear mixed model. All reported results were tested at p<0.05. Adopted infants were observed on average to approach and leave their mothers more frequently, explore the environment and locomote longer, exhibit more anxiety-like behavior, spend less time being held to their mother's breast, and were rejected by their mothers more when compared to nonadopted infants, indicating they are more likely responsible for maintaining the relationship. They also direct and receive more noncontact aggression on average to other social group members, and showed evidence of higher anxiety exhibiting high levels of anxiety-like self-directed behavior when compared to nonadopted infants. Also, results indicate that adopted infants have significantly lower levels of the CSF serotonin metabolites 5-hydroxyindoleacetic acid when compared to nonadopted infants.