Communication and AAC for Adults with Developmental Disabilities in Ontario

If you’re supporting an adult with a developmental disability in Ontario, one of the most important things you can do is make sure they have a reliable way to be heard — with or without speech. This guide explains what AAC (Augmentative and Alternative Communication) is, how good communication partners support it every day, how high-tech devices are funded in Ontario, and which methods the science supports and which it doesn’t. Every figure here is sourced and dated so you can act on it with confidence. It’s general information, not a substitute for a professional assessment.

A quick scope note: this page owns communication and AAC. The legal mechanics of consent, capacity, and supported decision-making live in a separate legal-capacity guide; the deeper look at mental health and behavioural distress lives in a co-occurring-mental-health guide; general staff-quality standards live in a day-program-quality guide; and self-advocacy as a movement has its own forthcoming page. Where those hand-offs matter, they’re flagged inline.

The short version

• Everyone communicates. The absence of speech is never the absence of thought or of something to say. Best practice is to “presume competence” — the “least dangerous assumption” (Anne Donnellan, 1984) — and to treat every person as a communicator with rights, including the right to a working AAC system (NJC Communication Bill of Rights, 3rd ed., 2024).
• AAC (Augmentative and Alternative Communication) is “all the ways we communicate besides talking.” It ranges from unaided methods (gestures, sign, facial expression, body language) to aided ones (objects, picture/symbol boards, PECS, and high-tech speech-generating devices and tablet apps). There are no prerequisite skills required to start AAC, and it does not suppress speech.
• “Total communication” — using more than one method — is the goal: use whatever combination works for the person in each situation, rather than forcing one single method.
• In Ontario, funded high-tech AAC runs through the Assistive Devices Program (ADP), which pays 75% of the approved price (100% for people on ODSP, Ontario Works, or ACSD) after an assessment by a speech-language pathologist (SLP) or occupational therapist (OT). There’s a real catch: ADP eligibility requires a “long-term physical disability,” and adult high-tech AAC assessment capacity is thin — the province has 20 designated AAC clinics, of which only 5 are adult high-technology services. See Assistive Technology and Digital Inclusion in Ontario: A Family Guide for the wider device landscape.
• Some methods are contested. Facilitated Communication (FC) and its offshoots — Rapid Prompting Method (RPM) and Spelling to Communicate (S2C) — are opposed or not recommended by major professional bodies, because the evidence shows the facilitator, not the disabled person, tends to author the messages. These are distinct from evidence-based AAC.

What every family should know

1. Presume competence. Assume the person understands and has something to say, even without conclusive evidence — because the harm of wrongly assuming someone is not competent is far greater than the harm of wrongly assuming they are. This is Donnellan’s “criterion of the least dangerous assumption” (Behavioral Disorders, 1984): “in the absence of conclusive data, educational decisions should be based on assumptions which, if incorrect, will have the least dangerous effect.” Presuming competence changes how we act — it keeps us talking to, informing, and offering communication tools to the person. There is a live professional debate worth knowing about: some SLPs caution that “presumed competence” should not replace a proper clinical assessment and feature-matching of communication systems, and they note the term’s historical link to FC. The consensus that resolves this: presume competence about the person AND do rigorous, evidence-based assessment of the tools.

2. Communication is a right. The NJC Communication Bill of Rights (3rd ed., 2024) sets out rights including being addressed directly (not spoken for), receiving a response to every communication attempt, and having “individualized, working augmentative and alternative communication (AAC) systems and other assistive technology (AT) at all times.”

3. AAC is a spectrum, and using more than one method is normal. People mix and match — some speech, some signs, gestures, a picture board, and a device — and switch by context. This is “total communication.”

4. Good communication partners are made, not born. The highest-value everyday practices are wait time, aided language modelling, honouring all communication attempts, not speaking for the person, and building an environment that invites communication.

5. Adults are under-served. Adult AAC assessment access in Ontario is thin, devices are frequently abandoned, and the whole field leans toward children.

What AAC actually is

The American Speech-Language-Hearing Association (ASHA) defines AAC as “all of the ways that someone communicates besides talking.” “Augmentative” means it adds to existing speech; “alternative” means it replaces speech that isn’t functional. AAC divides into two families:

• Unaided AAC uses only the body: gestures, facial expressions, body language, vocalizations, and manual signs. It needs no external tools, but the communication partner has to know how to read the person’s signals.
• Aided AAC uses external tools, and runs from low-tech to high-tech:
  • Low-tech (no batteries): objects/tangible symbols, photographs, picture and symbol boards and books, alphabet boards, and the Picture Exchange Communication System (PECS).
  • Mid-tech: simple battery-powered devices with recorded messages (for example single-message “BIGmack”-type switches and talking photo albums).
  • High-tech: dedicated speech-generating devices (SGDs) and tablet/computer apps that produce synthesized or digitized speech (for example Proloquo2Go and TouchChat, and dedicated devices from makers such as Tobii Dynavox and Saltillo).

PECS is a specific, manualized, six-phase protocol (developed by Andy Bondy and Lori Frost in 1985 at the Delaware Autism Program) rooted in applied behaviour analysis. It teaches a person to exchange a picture for a desired item, then builds through distance and persistence, picture discrimination, sentence structure, responding to “What do you want?”, and commenting. It’s considered an evidence-based practice, and fidelity to the protocol — with trained implementers — matters for outcomes: a meta-analysis found effectiveness increased with each hour of implementer training.

There are no prerequisites for AAC. The old “candidacy model” (a person had to be “ready” or prove certain cognitive/motor skills before getting a system) was replaced decades ago by the “participation model” (Beukelman & Mirenda). ASHA’s Position Statement on Access to Communication Services and Supports (2003) explicitly rejects using a priori criteria — including “(a) discrepancies between cognitive and communication functioning; (b) chronological age; (c) diagnosis; (d) absence of cognitive or other skills purported to be prerequisites; (e) failure to benefit from previous communication services and supports” — as violations of recommended practice. AAC also does not hinder speech; research (for example Millar & Schlosser) indicates it often supports speech development.

The spectrum in practice

For many people with developmental disabilities, communication begins with informal, personal signals that familiar people learn to read — a particular vocalization, a reach, a facial expression, moving toward or away from something. These are legitimate communication and should be documented and honoured (for example in a personal communication dictionary or passport). From there, systems can layer in low-tech symbols, then dedicated devices or apps where appropriate. The point isn’t to “graduate” from one method to the next — it’s to expand the toolkit.

Total communication — using every mode

Total communication is a holistic approach that accepts and uses all modes — speech, signs, gestures, facial expression, objects, pictures, and aided AAC — and values them equally. ASHA’s practice portal explicitly endorses multimodal intervention: “the user is not restricted to aided or unaided approaches but can use a combination of communication modalities, depending on the environment, listener, and intent of the message.” Forcing a single method is a common and avoidable mistake.

Getting and funding AAC in Ontario

The SLP and OT role. A speech-language pathologist (SLP) is the core professional for AAC assessment and intervention. Speech-Language & Audiology Canada (SAC) is the national body; the Ontario regulator is the College of Audiologists and Speech-Language Pathologists of Ontario (CASLPO). SAC’s position paper on the SLP role in AAC (2015) sets out expected competencies including aided and unaided strategies, partner strategies, and modelling. Feature-matching (matching a person’s abilities and needs to device features) is standard practice.

Ontario’s Assistive Devices Program (ADP). ADP, run by the Ministry of Health, is the main public funding route for communication aids. The key current rules (ADP “Communication aids” page, last modified February 18, 2026; Communication Aids Policy and Administration Manual, July 2023):

• What’s covered: communication display boards, writing aids, quick messaging devices, speech-generating devices, and the assistive software, hardware, and mounting systems for them (plus voice prosthetics, amplifiers, and electrolarynges). Not covered: anti-stuttering devices, call bells, environmental control units, and telephones.
• How much: ADP pays 75% of the approved price; the client pays 25%. For people receiving Ontario Works (OW), the Ontario Disability Support Program (ODSP), or Assistance for Children with Severe Disabilities (ACSD), ADP pays 100%. ADP sets the maximum price a registered vendor may charge.
• Process: first-time applicants see a physician or nurse practitioner, who refers to an ADP-registered SLP or OT authorizer; the authorizer assesses and identifies the device; for advanced or high-tech devices the person is referred to a registered communication (AAC) clinic. Per the ontario.ca “Communication aids” page, “We aim to review your application within 8 weeks of receiving it,” and reimbursement of “75% of the device’s ADP price” follows “within 4 weeks of when we receive your invoice.” Devices must not be purchased before approval.
• Leasing: for changing or degenerative needs, equipment can be leased through the Centralized Equipment Pool (CEP) for Communication Aids.
• ADP does not cover repairs (except for leased devices).

The eligibility catch. ADP requires a “long-term physical disability” (six months or longer). The Communication Aids Policy and Administration Manual (July 2023, Policy 300) states: “The Applicant must have a long-term physical disability and require an augmentative or alternative communication aid for their own personal use to enhance or replace oral and/or written communication to perform common everyday tasks/Activities of Daily Living … for six (6) months or longer.” This is a real access barrier for people whose primary disability is intellectual or developmental (for example autism or intellectual disability) without a physical or motor impairment — as one Ontario autism-funding guide (Know Autism) puts it bluntly, “An autism diagnosis alone does not make someone eligible for ADP.” In practice, applicants often qualify only when a physical or motor component is documented.

Other funding routes.

• ODSP covers the client’s 25% co-payment and assessment fees for ADP devices for those on benefits, and covers annual lease payments for approved high-technology communication devices up to the ADP-approved amount.
• Passport funding (Ministry of Children, Community and Social Services, for adults 18+ with a developmental disability) is a reimbursement program used flexibly for community participation, respite, and — since the April 1, 2023 guidelines update — up to a $3,000 maximum annual reimbursement for “technology-related goods and services, which includes hardware, electronics and related services.” This can help with communication tools that fall outside ADP, but families should confirm the current admissible-expense rules for the date of the expense.
• ACSD supports those under 18; families should plan for the transition as a young person ages out at 18.
• Charities (March of Dimes Canada, Easter Seals Society) and private insurance are named by ADP itself as alternatives for those who aren’t eligible or who need help with the co-payment.

Who serves adults (thin capacity). ADP high-tech AAC assessment happens at designated AAC clinics. Per Ontario’s ODSP Policy Directive 9.6 (Assistive devices): “There are 20 ADP-designated Alternative and Augmentative Communication (AAC) Centres in Ontario. Five of these are specifically adult high technology services.” This scarcity, combined with the “physical disability” gate and long waits for SLP services in adulthood, means many non-speaking adults never get a proper AAC assessment. Adult AAC access is materially thinner than children’s access. If you’re also coordinating appointments and referrals, Navigating Healthcare for an Adult with a Developmental Disability in Ontario covers how to work the referral system.

Supporting communication day-to-day

Frontline staff and families are the make-or-break communication partners. The evidence-based partner strategies are:

• Wait time / processing time. Give substantially longer pauses than feel natural — often 10 to 15 seconds — before repeating, rephrasing, or prompting. Many AAC users need more processing time than the rhythm of ordinary conversation allows.
• Aided language modelling (also called “aided language stimulation” or “aided language input”). The partner uses the person’s own AAC system while talking — pointing to symbols or words on the board or device as they speak. This is how people learn a system, just as spoken language is learned by hearing it. Model without demanding the person respond right away (“modelling without expectation”). A scoping review (Wandin, Tegler, Svedberg et al., Current Developmental Disorders Reports, 2023) of 29 studies covering 237 participants with emergent communication reported “positive outcomes from the aided AAC modeling interventions … in the majority of the studies.”
• Honour all communication attempts. Respond to every attempt — including gestures, vocalizations, and behaviour — as meaningful, even when you can’t fulfil the request. Acknowledging attempts increases future communication; ignoring them is harmful (NJC).
• Don’t speak for the person. Speak directly to the person, not to their support worker or family member. When a support person relays a message, confirm it with the individual (“Is that what you wanted to say?”).
• Environmental supports. Keep the AAC system available at all times and charged and functional; build in communication opportunities; make sure vocabulary is personalized and current (nouns tend to dominate, but including verbs and other word types increases acceptance and use); display the CDAC communication access symbol and give people time.

Communication and autonomy

Reliable communication is the foundation of choice, consent, safeguarding, and self-advocacy. A person who can’t make themselves understood can’t easily refuse, complain, disclose abuse, or direct their own life. Communication Disabilities Access Canada (CDAC) frames this through UN CRPD Article 12 — the right to exercise legal capacity with the supports one needs (Canada ratified the CRPD in 2010). The legal mechanics of consent, capacity, and supported decision-making are handled in the separate legal-capacity guide — here the point is simply that communication access is a precondition for all of it, and that denying or ignoring communication is a safeguarding risk. CDAC specifically flags barriers such as not having procedures to support informed consent in healthcare or legal settings, and not having supports to disclose or testify about abuse.

Behaviour as communication

When other channels aren’t available, distress or “challenging behaviour” is often the message — a way of communicating pain, fear, a need, or a refusal. Functional Communication Training (FCT) research (Carr & Durand, 1985 onward) shows that teaching an effective communication response that serves the same function as the behaviour reduces the behaviour, as long as the communication response is at least as efficient as the behaviour. The NJC notes AAC interventions effectively reduce challenging behaviour, and AAC meta-analyses (for example Walker & Snell, 2013) support this. The mental-health and behavioural-distress deep-dive — including diagnostic overshadowing — is handled in the separate co-occurring-mental-health guide, and Positive Behaviour Support in Ontario: A Plain-Language Guide for Families covers the behavioural-support approach in depth. The communication takeaway: before treating behaviour as a problem to be managed, ask what it’s communicating and whether the person has a reliable alternative way to say it.

Grey areas and points of confusion

Facilitated Communication (FC), Rapid Prompting Method (RPM), and Spelling to Communicate (S2C)

These are related “facilitator-dependent” techniques in which a non-speaking person points to letters on a board or keyboard while an assistant provides physical support (FC) or holds and moves a letterboard and prompts (RPM/S2C). They have to be clearly distinguished from evidence-based AAC.

The scientific consensus. Multiple professional bodies oppose or advise against these methods:

• ASHA (2018) issued two position statements. On FC: “It is the position of the American Speech-Language-Hearing Association (ASHA) that Facilitated Communication (FC) is a discredited technique that should not be used. There is no scientific evidence of the validity of FC, and there is extensive scientific evidence — produced over several decades and across several countries — that messages are authored by the ‘facilitator’ rather than the person with a disability.” On RPM: it “is not recommended because of prompt dependency and the lack of scientific validity,” and information obtained through RPM “should not be assumed to be the communication of the person with a disability.” ASHA groups S2C with RPM.
• ISAAC (2014) does not support FC as a valid form of AAC, a valid means to access AAC, or a valid means to communicate.
• ASHA notes its FC position is consistent with “as many as 19 other national and international professional and advocacy organization statements,” including the American Psychological Association (which in 1994 called FC “a controversial and unproved communicative procedure with no scientifically demonstrated support for its efficacy”) and behaviour-analytic bodies.

The core scientific problem is authorship. Controlled “message-passing” tests — where the facilitator doesn’t know the answer, or is shown different information than the disabled person — have repeatedly shown, across decades, that the facilitator controls the output in FC. RPM and S2C have largely not been subjected to comparable controlled authorship testing; proponents have generally resisted such tests, and analyses of videos indicate facilitators tend to cue and move the board. A systematic review of FC authorship (Schlosser, Balandin, Hemsley et al., 2014) and later reviews found no reliable evidence of independent authorship for these methods.

Represent this fairly, without false balance. There is a genuine, decades-long scientific consensus that FC messages are not authored by the disabled person, and that RPM and S2C lack validation of independent authorship. At the same time, be respectful: some autistic self-advocates and organizations (for example the Autistic Self Advocacy Network) have objected that blanket position statements risk denying communication rights, and that ASHA did not develop its positions in collaboration with self-advocates. The ethical resolution most professional bodies advocate: never assume messages produced by facilitator-dependent methods are the person’s own words, and instead pursue evidence-based routes to independent communication (well-supported AAC, aided language modelling, systematic fading of physical support). The concern is not that non-speaking people can’t be literate or competent — they can — but that these specific techniques risk substituting the facilitator’s voice for the person’s, which is a serious rights and safeguarding harm (for example in consent or abuse-disclosure situations).

Thin adult-support data and device abandonment

• Abandonment is common. Estimates vary widely by method and source. ASHA’s AAC practice portal states: “Abandonment occurs in approximately one third of cases (Zangari & Kangas, 1997), even if the system is well designed and functional (Johnson et al., 2006).” Some practitioner sources cite higher figures — Medbridge (“Beating the Odds in AAC Device Abandonment,” 2022) states “as many as three out of five AAC systems may be abandoned and left on a shelf within a year by caregivers who could not, or would not, make it work.” Causes include poor feature-matching, lack of communication-partner training and support, device reliability/speed/voice-quality issues, funding and waitlist barriers, and lack of family involvement. A 2023 model (Waller and colleagues, Augmentative and Alternative Communication) reframes some “abandonment” as a legitimate multimodal choice by the user rather than a failure — but much abandonment reflects system failure, not preference.
• Adults are under-assessed. Research and lived-experience accounts (for example autistic adults surveyed in recent AAC studies) note limited access to SLPs for adults, and that AAC infrastructure, research, and training skew heavily toward children. This is where genuine effort and expertise are most needed.

How current is this, and what to double-check

• Recency and staleness. The Ontario ADP figures here reflect the “Communication aids” page (last modified February 18, 2026), the Communication Aids Policy and Administration Manual (July 2023), and ODSP directives (updated March 2026). Funding amounts, coverage percentages, and the maximum-price schedule are reviewed on cycles and can change — verify against ontario.ca and the current Manual before relying on specific dollar figures. Passport guidelines were last substantially updated April 1, 2023 (with a new claims-submission deadline structure taking effect March 31, 2027); confirm current admissible expenses and annual maximums for the date of the expense.
• The “20 clinics / 5 adult” figure for ADP AAC clinics appears in current (2026) Ontario government material but may be a legacy count carried forward from around 2018; the ADP program office ([email protected]) is the definitive source for a live count.
• Terminology. This guide uses “non-speaking” (preferred) rather than “non-verbal,” and describes support needs rather than functioning labels. Communities differ on identity-first (“autistic person”) versus person-first (“person with a disability”) language; follow the individual’s stated preference.
• Source reliability. Professional-body sources (ASHA, ISAAC, SAC, CDAC, NJC) and peer-reviewed systematic reviews were prioritized. Some abandonment statistics come from older studies (for example Zangari & Kangas, 1997) or practitioner blogs and should be treated as indicative rather than precise. For contested methods, this guide reflects the position of the major speech-language and scientific bodies; a minority of self-advocacy organizations dissent, and that dissent is noted rather than erased.
• Scope. Legal capacity and consent, mental health and behavioural distress, day-program quality standards, and the self-advocacy movement are covered in their own dedicated guides, as flagged inline above.

Related: Assistive Technology and Digital Inclusion in Ontario: A Family Guide · Navigating Healthcare for an Adult with a Developmental Disability in Ontario · Positive Behaviour Support in Ontario: A Plain-Language Guide for Families