Long-term use of television, balls, and mirrors as enrichment for paired and singly caged chimpanzees* (1996)

Brent, L., Stone, A. M.

Abstract

Chimpanzees used televisions, balls, and mirrors for 0.27-1.53% of the observation time after several years of exposure to the enrichment items. Television and ball use were significantly higher than mirror use. *Abstract of this work has been published in: American Journal of Primatology 31: 301, 1993; Brent L, Stone AM; Long-term use of enrichment for paired and singly caged chimpanzees.