Washoe (c. September 1965 – October 30, 2007) was a female common chimpanzee who was the first non-human to learn to communicate using American Sign Language (ASL) as part of an animal research experiment on animal language acquisition.
Washoe learned approximately 350 signs of ASL, also teaching her adopted son Loulis some signs. She spent most of her life at Central Washington University.
Washoe was born in West Africa in 1965. She was captured for use by the US Air Force for research for the US space program. Washoe was named after Washoe County, Nevada, where she was raised and taught to use ASL.
In 1967, R. Allen Gardner and Beatrix Gardner established a project to teach Washoe ASL at the University of Nevada, Reno. At the time, previous attempts to teach chimpanzees to imitate vocal languages (the Gua and Viki projects) had failed. The Gardners believed that these projects were flawed because chimpanzees are physically unable to produce the voiced sounds required for oral language. Their solution was to utilize the chimpanzee's ability to create diverse body gestures, which is how they communicate in the wild, by starting a language project based on American Sign Language. The Gardners raised Washoe as one would raise a child. She frequently wore clothes and sat with them at the dinner table. Washoe had her own 8-foot-by-24-foot trailer complete with living and cooking areas. The trailer had a couch, drawers, a refrigerator, and a bed with sheets and blankets. She had access to clothing, combs, toys, books, and a toothbrush. Much like a human child, she underwent a regular routine with chores, outdoor play, and rides in the family car. Upon seeing a swan, Washoe signed "water" and "bird". Harvard psychologist Roger Brown said that "was like getting an S.O.S. from outer space".
When Washoe was five, the Gardners decided to move on to other projects, and she was moved to the University of Oklahoma's Institute of Primate Studies in Norman, Oklahoma, under the care of Roger Fouts and Deborah Fouts.