This article reviews the emergence and linguistic development of protactile — a tactile language that arose organically within the DeafBlind community in the United States beginning in 2007. Written by Gallaudet University researchers Deanna Gagne and Hayley Broadway, the paper situates protactile within the broader history of sign language linguistics, documents its core structural innovations, examines early acquisition by DeafBlind children, and closes with a discussion of the ethical responsibilities that come with studying a community-based emerging language.
Before 2007, DeafBlind individuals in the U.S. relied heavily on interpreters to mediate nearly all communication — even conversations with other DeafBlind people. A turning point came when the DeafBlind Service Center in Seattle hired a DeafBlind director, drawing more DeafBlind employees together. Faced with a shortage of interpreters, they made a radical decision: communicate directly with each other. This shift was not merely practical — it was philosophical. The protactile movement reframed touch as a valid, primary epistemology rather than a workaround for inaccessible visual communication.
Prior to protactile, DeafBlind individuals had been adapting ASL into a tactile modality (Tactile ASL), but with significant limitations. Many ASL signs depend on distinctions in hand placement relative to the face (e.g., MOTHER vs. FATHER), facial expressions for grammar, and spatial conventions that are simply not perceptible through touch. Protactile was built from the ground up to work within — and honor — the tactile channel.
Contact Space: Rather than signing in the air in front of the body as ASL does, protactile uses the listener's body as the primary site for communication. Referents are established through touch on the listener's arm, leg, or upper chest, and spatial grammar is expressed through movement to and from those contact points — making all spatial information physically accessible.
Reciprocity: All participants, regardless of vision status, are expected to engage through touch. This ensures DeafBlind individuals are full participants in conversation, not passive recipients. One hand listens to the speaker's message while the other hand provides continuous tactile feedback — expressions of agreement, laughter, questioning, and attention — on the speaker's body.
Information Source: The origin of information must be made explicit through touch. Rather than assuming shared visual context, protactile users physically guide their interlocutor's hand to the source — a phone, object, or person — to ensure complete and transparent shared understanding.
Phonology: Edwards & Brentari (2020) documented how protactile has developed a novel phonological system distributed across four articulators (two hands per person in contact). Specific linguistic functions — initiation, object representation, movement, continuity prompts — are systematically assigned to different articulators, demonstrating that phonological organization can emerge in a tactile modality independent of both speech and vision.
Demonstratives: A follow-up study (Edwards & Brentari 2021) identified four distinct types of taps in protactile: backchanneling taps (listener feedback), exophoric demonstrative taps (directing attention to real-world objects), endophoric demonstrative taps (referencing elements already in discourse), and propriotactic taps (coordinating the four hands in a shared interaction). These tap types demonstrate that protactile is developing a grammaticalized deictic system grounded in intersubjectivity rather than visual space.
Neural Processing: Neuroimaging research (Berger 2021) found that DeafBlind protactile users recruit the same left-hemisphere language regions as deaf ASL users during communication, suggesting that the brain's language networks are modality-independent. Mutual touch in protactile activated similar neural responses to mutual gaze in sighted individuals.
Protactile is unusual among emerging languages in that it developed entirely among adults — children played no initial role in its creation. The PT Kids Lab at Gallaudet is now investigating what happens when DeafBlind children are exposed to protactile from an early age. A case study (Gagne et al. 2023) followed a DeafBlind toddler interacting twice weekly with a DeafBlind protactile educator over four months. In just 13 minutes of sampled video from the final month, over 300 distinct touch events were recorded. The child showed increasing engagement with meaningful contact and began producing attention-modulating taps — early evidence that protactile is acquirable by children in developmentally appropriate ways.
The study also observed that DeafBlind adults approach touch very differently from sighted caregivers. Where sighted people may initiate contact abruptly — assuming the other person can see them coming — protactile practitioners use gradual, coregulated approaches that give the DeafBlind child time to orient and choose to engage. The authors suggest that this difference may explain documented touch aversion in DeafBlind children who have primarily been approached by sighted caregivers.
The paper dedicates significant space to research ethics, arguing that protactile cannot be studied using conventional extractive academic frameworks. Because the language is still emerging within a small, often geographically dispersed, and historically marginalized community, ethical engagement requires more than including DeafBlind participants — it demands positioning them as coresearchers, cotheorists, and coleaders from the outset. The authors share their own positionalities openly: Gagne is a hearing, sighted Coda and academic; Broadway is a DeafBlind educator and protactile user for whom protactile is a first language within the home. This transparency is framed as a model for how all researchers entering this space should operate.
Protactile expands the known range of human language by demonstrating that fully grammaticalized linguistic structure — phonology, demonstratives, interactional grammar — can emerge in the tactile modality. It challenges longstanding assumptions about what language requires and offers a rare window into language emergence in real time. For the MACLab and PT Kids Lab at Gallaudet, this work is central to understanding how DeafBlind children can be supported in acquiring a language that truly fits their sensory world.
Coppola, M., Flaherty, M., Gagne, D., Gagne, K., Kocab, A., Martin, A., Morales Blanco, D., Morales Ruíz, I., Pyers, J., & Senghas, A. (2025). Convergence and Emergence: How Nicaraguan Signing Has Been Shaped by Transmission, Acquisition, and Interaction. Sign Language Studies, 26(1), 69–103. DOI: 10.1353/sls.2025.a981200
Lillo-Martin, D., Gagne, D., & Chen Pichler, D. (2022)
