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The American Journal of Psychiatry, VOL. 130, No. 4

Articles | April 01, 1973

Early Stress and Later Response to Separation in Rhesus Monkeys

LAURENS D. YOUNG; STEPHEN S. SUOMI; HARRY F. HARLOW; WILLIAM T. MCKINNEY

Am J Psychiatry 1973;130:400-405.

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Resident in psychiatry, University of Wisconsin

Project Associate in the Primate Laboratory, University of Wisconsin

Professor of Psychology and Director of the Primate Laboratory, University of Wisconsin

Associate Professor of Psychiatry, University of Wisconsin

1973, The American Psychiatric Association

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Abstract

The hypothesis that separation in early life predisposes one to later psychopathology was tested using two groups of rhesus monkeys of similar age. The experimental group had undergone the stress of early life separation and confinement in a vertical chamber. The experimental animals responded to separation and reunion with increased self-mouthing, self-clasping, huddling, and rocking. The control group responded to separation with increased locomotion and responded to reunion with increased contact clinging and proximity behaviors. The implications of these findings are discussed.

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