Positive reinforcement training as a technique to alter non-human primate behavior: Quantitative assessments of effectiveness (2002)

Schapiro, S. J., Bloomsmith, M. A., Laule, G. E.

Abstract

We found that positive reinforcement techniques alter the expression of affiliative behavior in group-housed, female rhesus macaques. ... We found a statistically significant reduction in aggression when meals were fed to group-living chimpanzees using a co-operative feeding technique. .... We found that chimpanzees were reliably trained to enter the indoor portions of their indoor-outdoor enclosures. We found reductions in inactivity and solitary behavior associated with training in chimpanzees.