All great ape species (Gorilla gorilla, Pan paniscus, Pan troglodytes, Pongo abelii) and two-and-a-half-year-old children (Homo sapiens) discriminate appearance from reality

Journal of Comparative Psychology (2014) - Comment
pubmed: 25150962 doi: 10.1037/a0037385 issn: 1939-2087 issn: 0735-7036

Katja Karg, Martin Schmelz, Josep Call, Michael Tomasello