Assessment of attachment in differentially reared infant monkeys (Macaca radiata): Response to separation and a novel environment.

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Abstract
To assess the developmental consequences of rearing environments for 12 infant bonnet macaques (Macaca radiata), infants from 2 environments, either low foraging demand (LFD) or variable foraging demand (VFD) for their mothers, were observed under 2 test conditions after the completion of the differential rearing treatment. One of the test conditions involved introduction of the rearing cohorts to a novel room; this was done in two series of four 1-hr sessions, a series before and a series after completion of the 2nd test condition. The 2nd test condition involved a 20.5-hr removal of each mother from the rearing cohort; this was repeated once a week for 3 weeks. The results of the novel room tests effectively differentiated rearing treatments in this study and suggested treatment group differences in attachment security. In contrast, the maternal separations failed to differentiate rearing treatments.

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