Warniment, A., Brent, L. 1997. Abnormal behavior in a captive chimpanzee colony. The Newsletter 8(3), 1-3.

The purpose of this study was to link abnormal behaviors often expressed by chimpanzees living in captive environments to factors related to their care and housing. Individuals who had spent more time with their mothers had less abnormal behavior. Access to large, enriched play areas was related to fewer abnormal behavior patterns. Self-directed behaviors were higher in chimpanzees who had spent more time on research protocols. This may be related to individual housing.

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