Chimpanzees (Pan troglodytes)The LRC is the lifetime home to three chimpanzees: Lana, Sherman, and Mercury. Lana was part of the first LRC project in 1971, designed to produce an analog of human language in a nonhuman primate. Lana and Sherman were reared with exposure to keyboard-based visuographic symbols called “lexigrams” that represented people, places, foods, objects, activities, and other meanings. Mercury was raised around language use but was not systematically taught (and did not spontaneously acquire) symbol meanings. All three chimpanzees are currently active in a wide array of noninvasive comparative cognition research, including studies of spatial memory, delay of gratification, numerical cognition, analogical reasoning, cooperation, and language.  Panzee
Rhesus Monkeys (Macaca mulatta) Eight males macaques currently make up the LRC’s rhesus colony, productively working at computerized testing systems on tasks designed to assess learning and cognitive skills such as memory, knowledge of numbers, concepts and reasoning ability. As with the other animals at the LRC, the animals are not deprived of food or fluids or reduced in body weight for purposes of testing. Rather, the animals work on tasks as they choose to receive supplemental treats and for the challenge, control, and enrichment that the experiments provide. Life-long longitudinal studies of these (and the other) animals affords unique opportunities to investigate how cognitive competencies may build on prior experience and training. A resident colony of rhesus monkeys participate in noninvasive cognitive research
Capuchin Monkeys (Cebus apella)The LRC is the permanent home to three groups of socially-housed capuchin monkeys (total = 20). These animals actively participate in projects designed to evaluate a variety of social behavior including cooperation as well as computerized tasks to assess learning and cognition. Like the other animals at the LRC, the capuchin monkeys have access to indoor and outdoor caging areas and voluntarily participate in noninvasive research projects that are either computer-based or that use physical stimuli and traditional apparatus.  Three social groups of capuchins participate in a wide range of noninvasive studies of cognition and social cognition