Nonenculturated Orangutans’ (Pongo pygmaeus) Use of Experimenter-Given Manual and Facial Cues in an Object-Choice Task

Several experiments have been performed, to examine whether nonhuman primates are able to make use of experimenter-given manual and facial (visual) cues to direct their attention to a baited object. Contrary to the performance of prosimians and monkeys, great apes repeatedly have shown task efficiency in experiments such as these. However, many great ape subjects […]