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Washoe (chimpanzee)

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Washoe

Washoe (c. September 1965 – October 30, 2007) was a female chimpanzee who was the first non-human to learn to communicate using American Sign Language, as part of a research experiment on animal language acquisition.[1]

Washoe learned approximately 350 words of ASL.[2] She also taught her adopted son Loulis some American Sign Language.[3][4][5] Using similar teaching methods, several other chimpanzees were later taught 150 or more signs, which they were able to combine to form complex messages.[citation needed]

Early life

Washoe was born in West Africa in 1965. She was captured for use by the US Air Force for research for the space program.[6] Washoe was named for Washoe County, Nevada, where she was raised and taught to use ASL.[citation needed]

In 1967, Allen 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 Vicki projects) had failed. The Gardners believed that these projects were flawed because chimps are physically unable to produce the voiced sounds required for spoken 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.[7][8] 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 x 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.[9] One claim was that 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".[10]

At age 5, the Gardners decided to move on to other projects, and Washoe was moved to the University of Oklahoma's Institute of Primate Studies in Norman, Oklahoma, under the care of the Foutses. [11]

ASL instruction and usage

Teaching method

Washoe was raised in an environment as close as possible to that of a human child, in an attempt to satisfy her psychological need for companionship.[12][13][14]

While with Washoe, the Gardners and Fouts were careful to only communicate in ASL with Washoe, rather than using vocal communication, on the assumption that this would create a less confusing learning environment for Washoe. This technique is commonly used when teaching human children how to sign.[15]

After the first couple of years of the language project, the Gardners and Roger Fouts discovered that Washoe could pick up ASL gestures without operant conditioning methods by observing humans around her that were signing amongst themselves. For example, the scientists signed "Toothbrush" to each other while they brushed their teeth near her. At the time of observation, Washoe showed no signs of having learned the sign, but on a later occasion she reacted to the sight of a toothbrush by spontaneously producing the correct sign, thereby showing that she had in fact previously learned the ASL sign. Moreover, the Gardners began to realize that rewarding particular signs with food and tickles was actually interfering with the intended result of conversational sign language. They changed their strategy so that food and meal times were never juxtaposed with instruction times. In addition, they stopped the tickle rewards during instruction because these generally resulted in laughing breakdowns. Instead, they set up a conversational environment that evoked communication, without the use of rewards for specific actions.[16][verification needed]

Confirmed ASL signs

Washoe learned approximately 350 words of ASL.[2]

For researchers to consider that Washoe had learned a sign, she had to use it spontaneously and appropriately for 14 consecutive days.[17][18]

These signs were then further tested using a double-blind vocabulary test. This test demonstrated 1) "that the chimpanzee subjects could communicate information under conditions in which the only source of information available to a human observer was the signing of the chimpanzee;" 2) "that independent observers agreed with each other;" and 3) "that the chimpanzees used the signs to refer to natural language categories - that the sign DOG could refer to any dog, FLOWER to any flower, SHOE to any shoe."[19][verification needed]

Combinations of signs

Washoe and her mates were able to combine the hundreds of signs that they learned into novel combinations (that they had never been taught, but rather created themselves) with different meanings. For instance, when Washoe's mate Moja didn't know the word for "thermos", Moja referred to it as a "METAL CUP DRINK".[20]

Self-awareness and emotion

One of Washoe's caretakers was pregnant and missed work for many weeks after she miscarried. Roger Fouts recounts the following situation:

"People who should be there for her and aren't are often given the cold shoulder--her way of informing them that she's miffed at them. Washoe greeted Kat [the caretaker] in just this way when she finally returned to work with the chimps. Kat made her apologies to Washoe, then decided to tell her the truth, signing "MY BABY DIED." Washoe stared at her, then looked down. She finally peered into Kat's eyes again and carefully signed "CRY", touching her cheek and drawing her finger down the path a tear would make on a human. (Chimpanzees don't shed tears.) Kat later remarked that that one sign told her more about Washoe and her mental capabilities than all her longer, grammatically perfect sentences."[21]

(Note: Washoe herself lost two children; one baby died shortly after birth of a heart defect, the other baby, Sequoyah, died of a staph infection at two months of age.)

When Washoe was shown an image of herself in the mirror, and asked what she was seeing, she replied: "Me, Washoe."[22][23] Primate expert Jane Goodall, who has studied and lived with chimpanzees for decades, believes that this might indicate some level of self awareness.[23][24] Washoe experienced an identity crisis when she was first introduced to other chimpanzees. She was shocked to learn that she was not human, but gradually came to accept that she was a chimpanzee, and to enjoy associating with other chimps.[25]

Washoe also enjoyed playing pretend with her dolls, which she would bathe and talk to and would act out imaginary scenarios.[26][27]

When new students came to work with Washoe, she would slow down her rate of signing for novice speakers of sign language, which had a humbling effect on many of them.[28]

Later life, and death

Roger Fouts delivering Washoe's eulogy

Washoe had lived at Central Washington University since 1980; on October 30, 2007, officials from the Chimpanzee and Human Communication Institute on the CWU campus announced that she had died at the age of 42.[6][10]

Impact on bioethics

Some believe that the fact that Washoe not only communicated with, but also formed close and personal relationships with, humans indicates that she is emotionally sensitive and is deserving of moral status.[29]

Animal rights advocate Joan Dunayer thinks that Washoe's comprehension and usage of human language is particularly interesting, when compared to the difficulty that a human would have learning an animal language.

Work with Washoe and other signing primates motivated the foundation of the Great Ape Project, which hopes to "include the non-human great apes [chimpanzees, orangutans, and gorillas] within the community of equals by granting them the basic moral and legal protections that only humans currently enjoy", in order to place them in the moral category of "persons" rather than private property.[30]

The Nim Chimpsky project failed in its attempt to replicate the results of Washoe. This failure is attributed to poor teaching, and to Nim being consistently isolated in a sterile laboratory environment, and often confined in cages, for his entire life. Nim did most of his learning in a white eight-by-eight laboratory room (with one of the walls containing a one-way mirror), where he was often trained to use signs without the referent present. Living in this setting, Nim did not receive the same level of nurturing, affection, and life experience, and many have suggested that this impaired his cognitive development, as happens with human children subjected to such an environment.[31][32][33]

The publication of the Washoe experiments spurred a revival in the scholarly study of sign language, due to widespread interest in questions it raised about the biological roots of language.[34]

See also

References

  1. ^ Livingston, John A. (1996). "other selves". Rooted in the land: essays on community and place. Yale University Press. p. 133. ISBN 9780300069617. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)
  2. ^ a b Johnson, Lawrence E. (1993). A morally deep world: an essay on moral significance and environmental ethics. Cambridge University Press. p. 27. ISBN 9780521447065.
  3. ^ Fouts, R.H.; Fouts, D.M.; Van Cantfort, T.E. (1989). Teaching sign language to chimpanzees. SUNY Press. pp. 281–282. ISBN 9780887069659. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)CS1 maint: multiple names: authors list (link)
  4. ^ Fouts, Roger S. & Waters, Gabriel S. (2002). "Continuity, Ethology, and Stokoe: How to Build a Better Language Model". The study of signed languages: essays in honor of William C. Stokoe. Gallaudet University Press. p. 107. ISBN 9781563681233. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)CS1 maint: multiple names: authors list (link)
  5. ^ Byrne, Richard W. (1999). "Primate cognition: evidence for the ethical treatment of primates". In Dolins, Francine L. (ed.). Attitudes to animals: views in animal welfare. Cambridge University Press. p. 119. ISBN 9780521479066.
  6. ^ a b ""Signing" chimp Washoe broke language barrier". The Seattle Times. November 1, 2007.
  7. ^ Goodall, Jane (September 1986). The Chimpanzees of Gombe: Patterns of Behavior. Belknap Press. ISBN 978-0674116498.
  8. ^ Goodall, Jane (April 1, 1996). My Life with the Chimpanzees (Revised ed.). Aladdin. ISBN 978-0671562717.
  9. ^ Prof. Mark Kruase, Southern Oregon University, January 20, 2011.
  10. ^ a b Washoe, a Chimp of Many Words, Dies at 42. Benedict Carey, November 1, 2007. New York Times.
  11. ^ Hillix, William A. & Rumbaugh, Duane P. (2004). Animal bodies, human minds: ape, dolphin, and parrot language skills. Springer. pp. 87–88. ISBN 9780306477393.{{cite book}}: CS1 maint: multiple names: authors list (link)
  12. ^ Hillix, William A. & Rumbaugh, Duane P. (2004). Animal bodies, human minds: ape, dolphin, and parrot language skills. Springer. p. 69. ISBN 9780306477393.{{cite book}}: CS1 maint: multiple names: authors list (link)
  13. ^ Dresser, Norine (2005). "The horse bar mitzvah: a celebratory exploration of the human-animal bond". Companion Animals and Us: Exploring the Relationships Between People and Pets. Cambridge University Press. p. 91. ISBN 9780521017718. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)
  14. ^ Fouts, Roger S.& Deborah H. Fouts (1993). "Chimpanzees' Use of Sign Language". The Great Ape Project: Equality Beyond Humanity. Macmillan. p. 28. ISBN 9780312118181. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)
  15. ^ Orlans, F. Barbara (1998). The human use of animals: case studies in ethical choice. Oxford University Press. pp. 140–141. ISBN 9780195119084.
  16. ^ Gardner, R. A. & Gardner, B. T. (1998). The structure of learning from sign stimuli to sign language. Lawrence Erlbaum Associates.{{cite book}}: CS1 maint: multiple names: authors list (link)
  17. ^ Wise, Stephen M. (2003). Drawing the line: science and the case for animal rights. Basic Books. p. 200. ISBN 9780738208107.
  18. ^ Hillix, William A. & Rumbaugh, Duane P. (2004). Animal bodies, human minds: ape, dolphin, and parrot language skills. Springer. p. 82. ISBN 9780306477393.{{cite book}}: CS1 maint: multiple names: authors list (link)
  19. ^ Gardner, R. A. & Gardner, B. T. (1984). A vocabulary test for chimpanzees. "Journal of Comparative Psychology", 98, pg. 381-404
  20. ^ Hillix, William A. & Rumbaugh, Duane P. (2004). Animal bodies, human minds: ape, dolphin, and parrot language skills. Springer. pp. 71–72. ISBN 9780306477393.{{cite book}}: CS1 maint: multiple names: authors list (link)
  21. ^ Donovan, James M. & Anderson, H. Edwin (2006). Anthropology & Law. Berghahn Books. p. 190. ISBN 9781571814241.{{cite book}}: CS1 maint: multiple names: authors list (link)
  22. ^ Mitchell, Robert W. (2002). "A history of pretense in animals and children". Pretending and imagination in animals and children. Cambridge University Press. p. 40. ISBN 9780521770309. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)
  23. ^ a b Van Lawick-Goodall, Jane (2010). "The Behavior of Chimpanzees in their Natural Habitat". In Cohen, Yehudi (ed.). Human Adaptation: The Biosocial Background. Aldine Transaction. p. 113. ISBN 9780202363844.
  24. ^ Peterson, Dale & Goodall, Jane (2000). Visions of Caliban: On Chimpanzees and People. University of Georgia Press. pp. 21–22. ISBN 9780820322063.{{cite book}}: CS1 maint: multiple names: authors list (link)
  25. ^ Blum, Deborah (1995). The Monkey Wars. Oxford University Press. pp. 15–16. ISBN 9780195101096.
  26. ^ Gómez, Juan-Carlos & Martín-Andrade, Beatriz (2005). "Fantasy Play in Apes". The nature of play: great apes and humans. Guilford Press. p. 153. ISBN 9781593851170. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)CS1 maint: multiple names: authors list (link)
  27. ^ McCune, L. & Agayoff, J. (2002). "Pretending as representation". In Mitchell, Robert W. (ed.). Pretending and imagination in animals and children. Cambridge University Press. p. 51. ISBN 9780521770309.{{cite book}}: CS1 maint: multiple names: authors list (link)
  28. ^ Fouts, Roger S. (2008). "Foreword". In McMillan, Franklin D. (ed.). Mental Health and Well-Being in Animals. Wiley-Blackwell. pp. 15–17. ISBN 9780813804897.
  29. ^ Fern, Richard L. (2002). Nature, God and humanity: envisioning an ethics of nature. Cambridge University Press. p. 20. ISBN 9780521009706.
  30. ^ Guerrini, Anita (2003). Experimenting with humans and animals: from Galen to animal rights. JHU Press. p. 135. ISBN 9780801871979.
  31. ^ Lieberman, Philip (1998). Eve spoke: human language and human evolution. W.W. Norton & Co. pp. 38–39. ISBN 9780393040890.
  32. ^ Miles, H. Lyn (1997). "Anthropomorphism, Apes, and Language". Anthropomorphism, anecdotes, and animals. SUNY Press. p. 389. ISBN 9780791431252. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)
  33. ^ Hillix, William A. & Rumbaugh, Duane M. (1998). "Language in Animals". Comparative psychology: a handbook. Taylor & Francis. p. 841. ISBN 9780815312819. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)CS1 maint: multiple names: authors list (link)
  34. ^ Kendon, Adam (2002). "Historical Observations on the Relationship Between Research on Sign Languages and Language Origins Theory". The study of signed languages: essays in honor of William C. Stokoe. Gallaudet University Press. pp. 45–46. ISBN 9781563681233. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)

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