Extracts of the films taken during the 1930 Conference on PISL conservation, showing signers from various tribes.
Plains Indian Sign Language (PISL), also known as Plains Sign Talk,Plains Sign Language and First Nation Sign Language, is a trade language (or international auxiliary language), formerly trade pidgin, that was once the lingua franca across central Canada, central and western United States and northern Mexico, used among the various Plains Nations. It was also used for story-telling, oratory, various ceremonies, and by deaf people for ordinary daily use. It is falsely believed to be a manually coded language or languages, however there is not substantive evidence establishing a connection between any spoken language and Plains Sign Talk.
The name 'Plains Sign Talk' is preferred in Canada, with 'Indian' being considered pejorative by many. Hence, publications and reports on the language vary in naming conventions according to origin.
Plains Sign Talk's antecedents, if any, are unknown, due to lack of written records. But, the earliest records of contact between Europeans and Indigenous peoples of the Gulf Coast region in what is now Texas and northern Mexico note a fully formed sign language already in use by the time of the Europeans' arrival there. These records include the accounts of Cabeza de Vaca in 1527 and Coronado in 1541.
As a result of several factors, including the massive depopulation and the Americanization of Indigenous North Americans, the number of Plains Sign Talk speakers declined from European arrival onward. In 1885, it was estimated that there were over 110,000 "sign-talking Indians", including Blackfoot, Cheyenne, Sioux, Kiowa and Arapaho. By the 1960s, there remained a "very small percentage of this number". There are few Plains Sign Talk speakers today in the 21st century.
William Philo Clark, who served in the United States Army on the northern plains during the Indian Wars, was the author of The Indian Sign Language, first published in 1885. The Indian Sign Language with Brief Explanatory Notes of the Gestures Taught Deaf-Mutes in Our Institutions and a Description of Some of the Peculiar Laws, Customs, Myths, Superstitions, Ways of Living, Codes of Peace and War Signs is a comprehensive lexicon of signs, with accompanying insights into indigenous cultures and histories. It remains in print.
Sign language use has been documented across speakers of at least 37 spoken languages in twelve families, spread across an area of over 2.6 million square kilometres (1 million square miles). In recent history, it was highly developed among the Crow, Cheyenne, Arapaho and Kiowa, among others, and remains strong among the Crow, Cheyenne and Arapaho.
Signing may have started in the south, perhaps in northern Mexico or Texas, and only spread into the plains in recent times, though this suspicion may be an artifact of European observation. Plains Sign Talk spread to the Sauk, Fox, Potawatomi, Cherokee, Chickasaw, Choctaw, and Caddo after their removal to Oklahoma. Via the Crow, it replaced the divergent Plateau Sign Language among the eastern nations that used it, the Coeur d'Alene, Sanpoil, Okanagan, Thompson, Lakes, Shuswap, and Coleville in British Columbia, with western nations shifting instead to Chinook Jargon.
It is known that Navajo has a comparably sizeable population of individuals who can speak the Navajo dialect of Plains Sign Talk. There is also an unrelated sign language, Navajo Family Sign, in a clan of Navajos that has several deaf members.
There exists a variety of Plains Sign Talk within the Blackfoot Confederacy. Little is known about the language beyond that it is used by Deaf community members, as well as by the community at large, to pass on "oral" traditions and stories.
There are four basic parameters of Plains Sign Talk: the location of the hand, its movement, shape, and orientation:
Location—this involves the spatial placement of a sign. Signs may change meaning when placed in a different location, for example, in front of the face as opposed to in front of the torso.
Movement—this involves, as implied, the way the hands move when forming the sign. For example, in Plains Sign Talk, the signs AFTERNOON and MID-DAY form minimal pairs as they are both formed exactly the same, the only difference being that MID-DAY is stationary and AFTERNOON moves from above the head to the side in an arching motion.
Handshape—as implied, each sign takes on a certain shape in the hand, called a handshape. The handshapes of signs are a very key parameter. For example, the signs YES and I-KNOW are the same in all parameters except for the handshape; in YES the hand makes the Plains Sign Talk J shape, and in I-KNOW the hand takes the L shape.
Orientation—this refers to the orientation of the palm. This is clearly seen in the Plains Sign Talk words ABOVE and ADD. Both involve having the left hand act as a base from which the right hand rises, and both have the same location, movement, and handshapes; however, in ABOVE, the non-dominant hand is palm down, and in ADD the non-dominant hand is palm up.
There may be other parameters, such as facial features. However, these function like suprasegmentals, and the four parameters listed above are the crucial ones.
Although the parameters of sign are listed separately below, in actuality they co-occur with the other parameters to make a single sign. It is not clear how many of the differences were distinctive (phonemic).
^ abMcKay-Cody, Melanie Raylene (1998), "Plains Indian Sign Language: A comparative study of alternative and primary signers", in Carroll, Cathryn, Deaf Studies V: Toward 2000--Unity and Diversity, Washington DC: Gallaudet University Press, ISBN1893891097
^Wurtzburg, Susan, and Campbell, Lyle. "North American Indian Sign Language: Evidence for its Existence before European Contact," International Journal of American Linguistics, Vol. 61, No. 2 (Apr., 1995), pp. 153-167.
^ abTomkins, William. Indian sign language. [Republication of "Universal Indian Sign Language of the Plains Indians of North America" 5th ed. 1931]. New York : Dover Publications 1969. (p. 7)
^Davis, Jeffrey. 2006. "A historical linguistic account of sign language among North American Indian groups." In Multilingualism and Sign Languages: From the Great Plains to Australia; Sociolinguistics of the Deaf community, C. Lucas (ed.), Vol. 12, pp. 3–35. Washington, DC: Gallaudet University Press
^ abcDavis, Jeffrey E. (2010), Hand talk: Sign language among American Indian nations, Cambridge UK: Cambridge University Press, ISBN978-0-521-69030-0
^ abSupalla, Samuel J. (1992). The Book of Name Signs. p. 22.
^ ab"Language". Blackfoot Crossing Historical Park. Retrieved October 5, 2015.
^Davis, Jeffrey; Supalla, Samuel (1995). "A Sociolinguistic Description of Sign Language Use in a Navajo Family". In Ceil, Lucas. Sociolinguistics in Deaf Communities. Gallaudet University Press. pp. 77–106. ISBN978-1-563-68036-6.
^a Sign-language names reflect the region of origin. Natural sign languages are not related to the spoken language used in the same region. For example, French Sign Language originated in France, but is not related to French. ^b Denotes the number (if known) of languages within the family. No further information is given on these languages.