Japanese macaques form a cross-modal representation of their own species in their first year of life
Ikuma Adachi, Hiroko Kuwahata, Kazuo Fujita, Masaki Tomonaga, Tetsuro Matsuzawa
We tested whether infant Japanese macaques (Macaca fuscata) have a cross-modal representation of their own species. We presented monkeys with a photograph of either a monkey or a human face on an LCD monitor after playing back a vocalization of one of those two species. The subjects looked at the monitor longer when a human face was presented after the monkey vocalization than when the same face was presented after human vocalization. This suggests that monkeys recall and expect a monkey's face upon hearing a monkey's voice.
Cross-modal representation, Japanese macaque, Macaca fuscata, Natural concept