A comparison of rhesus monkey and gibbon responses to unfamiliar situations

11 gibbons and 11 rhesus monkeys were individually tested in 7 types of novel situations. Test situations used multiple unfamiliar cages, novel objects, unfamiliar animals of the same species, humans in standard situations, and a white rat. The 2 groups differed in both quality and quantity of exploration, with the gibbons more active. The rhesus […]