Behavioural Responses to Photographs by Pictorially Naïve Baboons (Papio Anubis), Gorillas (Gorilla Gorilla) and Chimpanzees (Pan Troglodytes)

This study assessed how pictorially naive nonhuman primates understand pictures. Fifty-five baboons with no prior exposure to pictures were trained to grasp a slice of banana presented against a pebble in a two alternative forced choice task. Post-training testing involved three stimulus pairs: (1) real banana slice vs. its picture, (2) the banana picture vs. […]