Stokoe Notation: Phonemic Script for Sign Languages Explained

Sign languages are independent, fully-fledged languages that exist in every country with a deaf community. They exist in contrast to but also together with spoken languages. The grammars of sign languages are fundamentally different from those of their surrounding spoken languages, though they may be influenced by them.

Sign languages are real, complex natural languages developed by deaf communities, not merely body language or dependent on spoken languages; they exhibit fundamental linguistic properties including grammar, vocabulary, and cultural elements, with hundreds of distinct sign languages worldwide that can become endangered like spoken languages, such as Hawaii Sign Language, while new sign languages frequently evolve among deaf communities.

Sign language is a natural language with its own independent structure and grammar, independent of spoken language; it demonstrates modality independence because the language faculty operates through different sensory modalities (visual/manual for sign language versus auditory/oral for spoken language), as evidenced by the Nicaraguan signing community's evolution from a pidgin to a creole language, showing how children systematically elaborate simplified communication systems into fully developed languages with complex grammatical structures including classifiers and agreement markers.

Sign languages are natural languages that arise spontaneously in deaf communities, possessing distinct grammatical structures different from spoken languages. They are acquired naturally through exposure, similar to how hearing children acquire spoken language. Each deaf community has its own unique sign language. Academic consensus now recognizes sign languages as legitimate objects of linguistic study alongside spoken languages. This dual-language availability allows researchers to investigate fundamental questions about human language by comparing two different modalities: spoken language (created by the vocal tract and perceived acoustically) and sign language (created by visible body movements and perceived visually).

Sign languages are natural languages that use manual communication, body language, and facial expressions to convey meaning, sharing fundamental linguistic properties with spoken languages including grammar, syntax, and semantic structure, despite common misconceptions that they are merely gestures or dependent on spoken languages; they develop naturally in deaf communities worldwide and exhibit unique features such as spatial grammar and simultaneous expression that exploit the visual medium.

Sign language articulation involves primary articulators (hands) and articulation points (locations in space). Signs occur at specific points like the nose or broader areas in front of the torso. Two conditions govern articulation: dominance (which hand performs the movement) and symmetry (signs can be produced with either hand). William Stokoe (1960) established three basic phonological parameters: location (where signs occur), movement (hand motion patterns), and handshape (hand configuration). These parameters form the foundation for analyzing sign language structure.

Handshape refers to how the hand is positioned during signing, with approximately 63 possible configurations. The manual alphabet is borrowed from Portuguese but sign language is not composed of these letters. Location refers to where signs are produced—on body parts (like chin for 'água' or chest for 'amigo') or in neutral space in front of the body. Changing either parameter changes the meaning of the sign.

Sign language is a complete linguistic system with five key parameters: (1) Hand configuration - the shape of hands used for signs; (2) Point of articulation - where on the body signs are produced (forehead, arm, neutral space, above head, below waist); (3) Movement - the motion given during signing; (4) Palm orientation; (5) Location. These parameters distinguish sign language from gestures and enable deaf people to communicate effectively.

All signs in American Sign Language consist of five essential parameters that work together to convey meaning. These parameters are: (1) Hand shape - the specific configuration of fingers used; (2) Palm orientation - the direction the palm faces (inward, outward, or other directions); (3) Location - where the sign is made in relation to the body; (4) Movement - how the hands move during the sign; and (5) Non-manual signals - facial expressions, eyebrow movements, body posture, and head movements. For example, the sign 'sad' uses five fingers (hand shape), palm facing inward (palm orientation), located in front of the body (location), moving downward (movement), and accompanied by a sad facial expression (non-manual signal).

Sign language has five phonological parameters: hand configuration (the shape of the hand), movement (the motion of the hand), location (where the sign is produced in space), orientation (the direction the hand is facing), and non-manual markers (facial expressions and body movements). These parameters work together to create meaning, similar to how phonemes work in spoken languages. The orientation and non-manual markers were the last parameters to be identified in sign language research.

American Sign Language (ASL) originated from the 1817 founding of the American School for the Deaf by Thomas Hopkins Gallaudet and Laurent Clerc, which established the first public school for deaf education in the United States and served as the foundation for ASL development through the spread of residential schools across the nation; however, the 1880 Milan Congress endorsed oralism, banning sign language in schools, which led to the formation of the National Association of the Deaf in 1890 to defend deaf civil rights and sign language usage.

Edward Minor Gallaudet, son of Thomas Hopkins Gallaudet, dedicated his life to deaf education. In 1856, philanthropist Amos Kendall donated land for a school for deaf and blind students. In 1864, at Edward Minor's urging, Congress passed legislation allowing the Columbia Institution to confer degrees as an institute of higher education. President Lincoln signed the charter, making it the first and only university for deaf and hard of hearing students in the world. In 1880, the first International Congress on Deaf Education met in Milan, Italy. Of 164 attendees worldwide, only one was deaf—James Denison from the United States. After brief discussions, hearing policymakers decided the oral method was superior to the manual method and banned sign language in schools across Europe and America. This devastating ruling caused generations of deaf people to struggle without language, education, and jobs. In 1960, linguist Dr. William C. Stokoe proved ASL is an official language—not pantomime or gestures, but its own language equal to spoken languages. Research showed learning ASL does not hinder English acquisition; it actually helps. Following the Milan Conference, segregated schools for the deaf emerged. While white schools banned ASL and replaced deaf teachers with hearing instructors, Black schools often escaped this enforcement. Left to their own devices, Black schools continued using ASL, preserving it during the oralism era. In 1852, Louise B. Miller sued the DC Board of Education for her deaf sons' right to attend Gallaudet, leading to the construction of Kendall School Division II—a precursor to Brown v. Board of Education. After desegregation in the 1960s-70s, integration proved difficult as Black and white deaf students couldn't understand each other. In 2011, research proved Black ASL is a dialect of ASL (at least 80% similar), differing in signs, larger signing space, and two-handed signs. Gallaudet now houses the Center for Black Deaf Studies.

This comprehensive overview traces the evolution of deaf education and language rights from ancient times to the present. Ancient philosophers believed deaf people could not learn, leading to social inferiority. During the Renaissance, scholars like Geronimo Cardano challenged these views. Charles-Michel de l'Épée established the first free public school for deaf children in 1771 and founded 21 schools throughout France. Meanwhile, Martha's Vineyard developed a unique sign language where nearly everyone used it. In 1814, Thomas Hopkins Gallaudet met deaf Alice Cogswell and traveled to France to study with Laurent Clerc. Together they founded the American School for the Deaf in 1817. Students brought home signs and Martha's Vineyard sign language, which merged with French sign language to create ASL. By 1863, 22 schools existed, and ASL was standardized. However, in the late 1880s, the oral method replaced ASL in many schools, punishing students for signing. It took about a hundred years to rediscover that accessible complete language taught early provides deaf people with the best education and life outcomes.

This section covers the scientific validation of American Sign Language and the subsequent development of professional interpreting services. In 1960, Dr. William Stokoe, an English professor at Gallaudet University, recognized that Deaf students were signing fluently and similarly to one another. Working with two Deaf researchers, he proved definitively that American Sign Language is a complete, independent language with its own grammar, syntax, morphology, hand shapes, locations, and five parameters including spatial movement and facial expression. This research established that ASL is not merely a form of English but a distinct linguistic system. Following this validation, individuals who grew up with ASL as their first language naturally became the first interpreters between Deaf and hearing communities. In the 1970s, college interpreter training programs were established nationwide, though interpreters discovered that cultural nuances cannot be fully learned in short training periods. A new movement emerged pairing Deaf and hearing interpreters to provide more complete communication services, with Deaf interpreters providing cultural context and hearing interpreters facilitating spoken translation.

In 1814, preacher Thomas Hopkins Gallaudet discovered that his young deaf neighbor Alice Cogswell could not communicate with other children. After attempting basic communication methods, Gallaudet traveled to Europe to learn deaf education techniques. He encountered resistance at the Braidwood school in England but found acceptance at Institut Royal des Sourds-Muets in France under Abbé Sicard. Gallaudet partnered with Laurent Clerc, exchanging French sign language for English writing instruction. Together they founded the American School for the Deaf in Hartford in 1817. As deaf students from Martha's Vineyard joined the school, their local sign language merged with French sign language, evolving into modern American Sign Language.