Ronald Cohn is a long-time research collaborator of psychologist Francine Patterson in her work in training Koko the gorilla in the use of American sign language. He has documented much of Koko's life on film and on camera, and is credited as the illustrator for the children's books Koko's Kitten, Koko-Love!: Conversations With a Signing Gorilla, and Koko's Story.
He is a co-founder of The Gorilla Foundation.
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