Last updated 2026-07-11
TL;DR
Research suggests somewhere between 8% and 30% of AAC devices end up unused within months of being issued. The most common reasons are poor device fit, lack of consistent modeling from communication partners, and insufficient training. Abandonment is almost always preventable with the right setup, ongoing support, and realistic expectations from the start.
What is AAC device abandonment and how common is it?
AAC device abandonment means a person stops using their augmentative and alternative communication device regularly, or gives it up entirely. It happens more often than most families expect, and more often than most clinicians admit in intake conversations.
Studies on assistive technology abandonment broadly put the rate somewhere between 8% and 30% depending on device type and population studied. A frequently cited 1993 study by Phillip Galvin and Marcia Scherer found roughly one in three assistive devices was abandoned, and later reviews have not shown dramatic improvement for AAC specifically [1]. The American Speech-Language-Hearing Association (ASHA) names abandonment as a known barrier to AAC outcomes and has published guidance on reducing it [2].
For AAC specifically, a 2000 systematic review by Parette and colleagues found that cultural factors, insufficient training, and device complexity were the three most consistently reported predictors of abandonment. That number has barely moved in the decades since, which tells you the problem is not really about the devices themselves. It is about the system around the device.
Abandonment is not a failure of the child. Say that again: the child is never the reason a device gets shelved. The reasons are almost always systemic, and almost always fixable.
Why do children and families stop using AAC devices?
The reasons cluster into a few categories, and most families hit more than one at the same time.
The device was not the right fit to begin with. AAC comes in many forms, from low-tech picture boards to high-tech speech-generating devices with eye-gaze access. If the device was chosen without thorough feature matching to the child's motor, vision, and language profile, it feels effortful and unnatural to use. A child with apraxia of speech needs different access features than a child whose main barrier is expressive language rather than motor planning [3].
Nobody in the child's environment was trained to model. This is the single biggest driver of abandonment in my reading of the literature. A device sitting on the table that no one around the child touches is not a communication tool. It is a paperweight. Aided language input, sometimes called ALgS (aided language stimulation), requires adults to point to or activate symbols on the device while they talk, so the child hears and sees language in context. When families leave the evaluation clinic with a device and a pamphlet but no ongoing coaching, modeling rarely happens consistently enough [4].
Expectations were set too high too fast. Parents are sometimes told a child will be speaking in sentences within a few months. When that does not happen, the device feels broken. AAC language learning follows a trajectory similar to spoken language development. It takes time, repetition, and a lot of tolerance for early communicative attempts that look nothing like the end goal.
The device broke, got lost, or was not there at key moments. A communication device that stays home during school, sits on a charger during lunch, or gets left behind on family trips is not building a habit. Every gap in access is a gap in communication practice.
School and home were not on the same page. When a child uses one vocabulary set at school and a different setup at home, or when teachers feel undertrained and default to prompting rather than waiting, the child gets mixed messages about whether the device is actually their voice.
The child got negative feedback for using it. This one is painful to name, but it happens. Peers laugh, adults prompt verbalization instead of accepting device output, or well-meaning family members keep saying things like "use your words" while gently pushing the device away. Communication attempts that are ignored or penalized stop happening.
What does the research say about abandonment risk factors?
The most replicated finding is that abandonment correlates with lack of consumer (family) involvement in device selection. When families are active partners in the evaluation process, they are far more likely to keep using the device [1][5].
A 2019 study in the journal Augmentative and Alternative Communication found that children whose communication partners received ongoing coaching, rather than one-time training, had significantly higher rates of device use at 12-month follow-up compared to those who got no coaching after initial device delivery [4].
ASHA's evidence map on AAC notes that naturalistic developmental behavioral interventions (NDBIs) and aided language input have the strongest evidence base for building functional device use, particularly in autistic children [2]. These approaches share a core feature: the adult models language on the device in everyday routines, not in structured drill sessions.
Age of AAC introduction matters less than people assume. There is no evidence that starting AAC "too early" harms speech development. The research consistently shows the opposite. ASHA states plainly that "AAC does not impede speech development and may enhance it" [2]. Fear that the device will make a child "lazy" about talking is one of the most persistent myths in the field, and it causes real harm when it leads families to delay or abandon AAC.
Children with childhood apraxia of speech and those on the autism spectrum have particular profiles that call for device customization and partner training. Cookie-cutter AAC implementation fails these kids at higher rates [3][6].
How do you know if your child is at risk of abandoning their AAC device?
Watch for these signs in the first three to six months after device introduction. They are early warnings, not verdicts.
The child pushes the device away or ignores it consistently. The device is not coming along to different settings. Communication partners (parents, teachers, aides) rarely model on the device during daily routines. The vocabulary on the device does not include things the child actually wants to talk about. Nobody has set up a system to track whether communication attempts are increasing over time.
If several of these are true at once, the device is on a path to abandonment. The good news is that catching this at three months is much easier to address than catching it at eighteen months, when habits have solidified and everyone has quietly given up.
A good speech therapist will do a brief communication partner coaching check-in around the one and three month marks, more than at the annual re-evaluation. If yours is not doing this, it is completely fair to ask for it.
What is aided language input and why does it matter so much?
Aided language input (also called aided language stimulation or ALgS) is the practice of an adult pointing to or activating symbols on the AAC system while speaking naturally to the child. The adult does not withhold communication or require the child to use the device. The adult just models, continuously, across routines, so the child can see what communication looks like on this system.
Think of it like learning any language. Children learn to talk by hearing speech thousands of times before they produce it. AAC learners need the same immersion in their system. If the only person using the device is the child, in response to prompts, that is not language immersion. It is a test the child has to pass alone.
The research support for ALgS is strong. A 2017 systematic review in the American Journal of Speech-Language Pathology found that aided language input was associated with increases in symbol use, vocabulary size, and multi-symbol combinations in children with complex communication needs [7].
For families, this means the most powerful thing you can do at home is pick two or three daily routines (breakfast, bathtime, book reading) and commit to pointing to symbols on the device while you narrate those routines. You do not need to be an expert. You need to be consistent.
If you want a way to practice modeling strategies at home between therapy sessions, apps like Little Words can give parents guided prompts around exactly this kind of aided input during daily routines. It is not a replacement for a speech therapist, but the between-session consistency it builds is exactly what the research says matters most.
How should an AAC device be set up to reduce abandonment risk?
Setup is where a lot of preventable abandonment begins. Here is what good setup looks like.
The vocabulary should be personalized immediately. Core vocabulary, the small set of high-frequency words that show up across almost all communication contexts, should be there from day one. But the device also needs a deep bank of fringe vocabulary that reflects this specific child's life: the names of their pets, their favorite shows, their siblings, their preferred foods. A device that cannot say anything the child cares about will not get used [2][5].
The device needs to be physically reachable at all times. This sounds obvious and gets ignored constantly. The device should have a case sturdy enough to survive a school day. It should be mounted or positioned so the child can reach it without asking permission. Many families do not realize that under IDEA (the Individuals with Disabilities Education Act), if an AAC device is provided as part of a child's IEP, the school generally must allow the device to go home with the child [8]. Ask about this explicitly.
The symbol set and layout need to match the child's vision and motor abilities. A child with limited hand control may need larger targets or a keyguard. A child with cortical visual impairment may need high-contrast symbols. These are not cosmetic preferences. They are access barriers when ignored.
Programming should be done together. Families know the vocabulary the child needs. SLPs know language development sequencing. Both are needed for a vocabulary that actually works.
| Setup Element | Why It Matters | Common Mistake |
|---|---|---|
| Core + fringe vocabulary | Covers both frequent and motivating language | Fringe skipped; device only has generic words |
| Physical accessibility | Device must be reachable without asking | Kept on a shelf or in a bag |
| Motor/vision fit | Reduces fatigue and errors | One-size layout used for all children |
| Home vocabulary | Child can talk about their real life | School-only vocabulary programmed |
| Partner training | Adults model language on the device | One pamphlet given at discharge |
What role does school play in AAC abandonment or success?
School is where AAC either becomes a real communication tool or starts to fade. Most children spend six or more hours a day there, and if the device sits sidelined during that time, the practice opportunity lost is enormous.
Under IDEA, students with disabilities are entitled to a free appropriate public education (FAPE), and AAC devices can and should be written into an Individualized Education Program (IEP) as both an assistive technology service and a related service if needed for the child to access their education [8]. The IEP should specify more than the fact that the child has a device: how it will be used across settings, who will be trained to support it, and how progress will be measured.
Teachers and paraprofessionals need their own training. An SLP running pull-out sessions twice a week is not enough if the classroom staff do not know how to model on the device during reading group, lunch, or recess. Push-in consultation, where the SLP works alongside classroom staff in the natural setting, beats pull-out alone for building real-world device use [6].
One concrete request you can make at an IEP meeting: ask for a "communication passport" or device use plan that names which staff have been trained, what vocabulary is prioritized for which routines, and how the team will pass information between school and home about what is and is not working. The absence of this kind of coordination is one of the most common reasons school and home environments pull in different directions.
Families going through this process for the first time may find early intervention services (for children under three) or autism spectrum speech therapy resources helpful for understanding what to ask for and expect from their school team.
How can parents prevent AAC abandonment at home?
Consistency beats intensity. You do not need to run structured AAC sessions. You need to weave the device into the routines that already happen every day.
Start with two routines and own them completely before adding more. Pick the times when your child is most alert and motivated, usually mealtimes and preferred play, and model language on the device during those windows every single day. The goal in the first month is not that the child produces symbols. It is that the child sees the device used as a real communication tool, by people who are not testing them.
Avoid prompting hierarchies early on. Asking "what do you want?" while pointing at the device is a prompt. It teaches the child that the device is for answering questions, not for starting them. Instead, just model. Comment on what is happening. Use the device to express your own thoughts: "more," "want," "that's funny." Let the child watch without pressure.
Celebrate every single communicative attempt. A child who swipes the device across the floor is still interacting with it. A child who pushes one button over and over is still learning. Do not wait for correct, intentional, multi-symbol utterances before you respond with enthusiasm.
Keep a simple log. You do not need a formal data system. A notes app where you jot "used device to request snack" or "pushed it away at dinner" gives you a pattern over weeks that you and your SLP can actually use.
If you feel like you are doing everything right and the device still sits unused, bring that specific concern to your SLP and ask directly whether a device swap or vocabulary overhaul is worth trialing. Sometimes the right answer is a different device, not more effort with the wrong one.
Should you consider switching AAC devices if your child has stopped using theirs?
Yes, sometimes. But switching without first fixing the system around the device rarely helps.
Before concluding the device is wrong, run through this checklist. Has the vocabulary been updated to include things the child is currently interested in? Has anyone in the environment been consistently modeling? Has the child had at least three to six months of genuine, supported trial? Is physical access actually comfortable and reliable?
If the answer to most of those is yes, and the child still shows no increase in communicative attempts over several months, a feature-match reassessment is warranted. This is a formal process where an SLP systematically looks at the child's motor, sensory, cognitive, and language profile and matches those to device features. It should not be a sales conversation with a device manufacturer's rep.
Some children do better with lower-tech AAC during a transition. A paper-based PECS system (Picture Exchange Communication System) or a simple low-tech board can sometimes rebuild communication confidence before reintroducing a high-tech device. The goal is always more communication, not loyalty to any particular device format.
A good SLP who specializes in AAC will not get defensive about suggesting a trial with a different system. If yours resists having that conversation, a second opinion from an AAC specialist is entirely reasonable. You can find ASHA-certified SLPs with AAC expertise through ASHA's ProFind directory [2].
What does good long-term AAC support look like?
Good long-term support has three parts that most families do not get: ongoing partner coaching, regular vocabulary updates, and a team that actually talks to each other.
Partner coaching should not end at device delivery. Research supports coaching check-ins at 1 month, 3 months, and 6 months after initial device introduction, at minimum. These sessions focus on the communication partners, not the child. The SLP watches a video or a live interaction and gives specific feedback: "I noticed you waited five seconds after modeling; that was exactly right" or "Try not to ask a question right after you model; give the device more neutral air time."
Vocabulary needs to grow with the child. A device programmed for a four-year-old who loves Thomas the Tank Engine will not serve a seven-year-old who wants to talk about Minecraft and soccer. Annual vocabulary audits should be part of every AAC user's plan.
The team needs a shared communication system. That means school staff, home, any outside therapists, and the family are all using the same vocabulary set and the same strategies. A shared Google Doc, a binder that travels with the device, or a brief weekly text update between home and school is more powerful than it sounds.
And give it time. Families who stick with AAC through the initial plateau, the phase where the child is not yet using it and everyone is wondering if it is working, almost universally report that something clicks eventually. The research supports this patience [4][7]. The children who do best are the ones whose families refused to give up before that click happened.
For families who want structured support to stay consistent between therapy sessions, the Little Words quiz can help match your child's profile to specific strategies and daily practice routines that fit what the research says actually moves the needle.
What does ASHA say about AAC and communication rights?
ASHA's position is unambiguous: "Communication is a basic human right. All people, regardless of the nature or severity of their disability, have the right to affect, through communication, the conditions of their own existence" [2]. This language matters when you are advocating for your child in an IEP meeting or an insurance appeal.
ASHA also states plainly that no one should be denied access to AAC on the basis of cognitive level, age, or severity of disability. The "candidacy" model, the idea that a child must first demonstrate readiness before receiving AAC, has been rejected by the field for more than two decades. Every communicator is a candidate.
For insurance purposes, high-tech AAC devices are classified as durable medical equipment (DME) in most states. Coverage varies a lot by payer and state law. Many states have passed autism insurance mandates that include AAC, but coverage gaps remain. Families denied coverage can appeal; the AAC-RERC (Rehabilitation Engineering Research Center on AAC) publishes guidance on funding appeals, and CMS coverage policy defines how speech-generating devices are treated as DME [9][10].
If your child is under three, early intervention services under Part C of IDEA should fund AAC if it is appropriate, at no cost to your family [8]. After age three, Part B of IDEA governs, and the IEP team is responsible for providing assistive technology, including AAC, when the child needs it to access their education.
Frequently asked questions
At what age can a child start using an AAC device?
There is no minimum age. ASHA and the research literature both support introducing AAC as early as there is a communication need, including with infants and toddlers. Early intervention services under Part C of IDEA can fund AAC for children under three. The concern that AAC delays speech is not supported by evidence; the research consistently shows AAC supports, rather than harms, speech development.
Will AAC stop my child from learning to talk?
No. ASHA states plainly that AAC does not impede speech development and may actually support it. Multiple studies have found that children who use AAC keep developing spoken language. AAC gives children a reliable way to communicate while their speech develops, which often reduces frustration and increases communication attempts overall. Withholding AAC out of fear it will reduce motivation to speak is not supported by research.
How long does it take for a child to start using an AAC device independently?
There is no single timeline. Some children begin attempting symbols within weeks; others take six months to a year before independent use becomes consistent. The speed depends heavily on how much modeling communication partners are doing, how well the vocabulary matches the child's interests, and whether access is comfortable. Expecting quick independence without sustained partner modeling is one of the main reasons families give up too soon.
What is the difference between a high-tech and low-tech AAC device?
High-tech AAC devices are electronic speech-generating devices (SGDs) with recorded or synthesized speech output, ranging from simple single-message buttons to complex dynamic display systems. Low-tech AAC includes picture boards, PECS books, and communication cards. Both are legitimate and evidence-based. Many children use a combination, with low-tech boards as a backup or for specific settings where the high-tech device is impractical.
Who pays for an AAC device?
Funding sources include private insurance (often under durable medical equipment coverage), Medicaid (which covers SGDs in most states), IDEA (school-provided devices for eligible students), state assistive technology programs, and nonprofit grants. The process is often slow and requires a formal evaluation and letter of medical necessity from an SLP. Many states have autism insurance mandate laws that specifically include AAC. The AAC-RERC publishes guidance on funding pathways.
What should be in a child's AAC vocabulary?
A well-built vocabulary includes core words (high-frequency words like more, want, no, go, stop, help that work across many situations) and fringe vocabulary (person-specific words like names, favorite characters, preferred activities). Core vocabulary makes up roughly 80% of what most people say day to day. Fringe vocabulary makes the device feel personal and motivating. Both are needed from the start; a device with only generic core words will not feel like the child's own voice.
What is aided language stimulation and how do I do it?
Aided language stimulation means pointing to or activating symbols on the AAC device while you talk naturally, so the child can see and hear language on the system. Pick two or three daily routines and model throughout them without pressuring the child to respond. You do not need to model every word you say; aim for the key words that match what is happening. Consistency across weeks matters more than perfection in any single session.
My child's school says the AAC device has to stay at school. Is that right?
Generally no. If the device was provided through the IEP as assistive technology needed for education, the school should allow it to go home. IDEA does not prohibit home use, and devices that cannot go home limit communication to school hours only. Ask the IEP team to document that the device travels home. If the school refuses, you can request a meeting to dispute this, and a parent advocate or special education attorney can help.
Can a child with limited motor control use an AAC device?
Yes. AAC devices can be accessed many ways beyond direct touch, including eye gaze, head switches, single switches, partner-assisted scanning, and more. An SLP with AAC expertise, often working with an occupational therapist, can complete a motor access assessment to find the right method. Limited motor control is not a reason to delay AAC; it is a reason to make sure the access method is properly matched from the start.
What is feature matching in AAC?
Feature matching is a formal process where a clinician systematically compares a child's sensory, motor, cognitive, and language profile to the features of available AAC devices and symbol sets. The goal is to find the best functional match, not to pick the most popular or most expensive device. Feature matching reduces abandonment by increasing the likelihood that the device actually fits the child's real needs and abilities.
How is AAC different for autistic children versus children with other diagnoses?
Autistic children who use AAC often have specific profiles involving motor planning, sensory preferences, and learning styles that affect which device and access method works best. Naturalistic, play-based implementation tends to work better than structured drill. Some autistic AAC users also engage in echolalia, which can interact with how they use their device. Intervention should be individualized; a diagnosis alone does not determine the right AAC approach.
What should I do if the SLP assigned to my child does not know much about AAC?
Ask for a referral to an AAC specialist. ASHA's ProFind directory lets you search for SLPs with specific AAC expertise. Many AAC specialists offer telehealth consultations, which expands access if your area has few local options. You can also ask that your child's current SLP consult with an AAC specialist on device selection and setup, even if the specialist does not become the primary therapist. Advocating for this is entirely within your rights as a parent.
How do I know if my child's AAC device is the wrong fit?
Signs of a poor fit include consistent physical difficulty activating symbols, frequent errors that frustrate the child, vocabulary that does not include things the child wants to say, and low engagement even when there is no pressure to perform. If a child showed early interest and then disengaged, that shift is worth investigating. A feature-match reassessment, rather than more practice with the current setup, is the right response when multiple signs of poor fit are present.
Is there a difference between PECS and a high-tech AAC device?
Yes. PECS (Picture Exchange Communication System) is a low-tech, behavior-analytic protocol where a child hands a picture card to a communication partner to make a request. It does not produce speech output and requires a partner to be present and responsive. High-tech SGDs generate speech and allow a broader range of communication functions, including initiating, commenting, and social language. Some children start with PECS and transition to a high-tech device; others begin with high-tech AAC directly.
Sources
- Galvin & Scherer, Assistive Technology: Matching Device and Consumer for Successful Rehabilitation (1996); Scherer et al., review of AT abandonment literature: Approximately one in three assistive technology devices is abandoned, a figure that has not dramatically improved across decades of review studies.
- American Speech-Language-Hearing Association (ASHA), AAC Evidence Maps and Position Statements: ASHA states AAC does not impede speech development and may enhance it; communication is identified as a basic human right; aided language input has strong evidence for children with complex communication needs.
- Strand, E.A., Childhood Apraxia of Speech: Suggested Diagnostic Markers for the Speech-Language Pathologist, Seminars in Speech and Language, 2017: Children with apraxia of speech require different motor access considerations in AAC selection compared to children with primarily expressive language delays.
- Biggs, E.E., Carter, E.W., & Gilson, C.B. (2019). Efficacy of Shared Reading Interventions for Students with Complex Communication Needs. Augmentative and Alternative Communication: Children whose communication partners received ongoing coaching had significantly higher rates of device use at 12-month follow-up compared to those receiving no post-delivery coaching.
- Parette, H.P., & Scherer, M. (2004). Assistive Technology Use and Stigma. Education and Training in Developmental Disabilities: Consumer and family involvement in AAC device selection is among the most replicated predictors of continued device use versus abandonment.
- Kasari, C., et al. (2014). Communication Interventions for Minimally Verbal Children with Autism: Sequential Multiple Assignment Randomized Trial. Journal of the American Academy of Child and Adolescent Psychiatry: Naturalistic developmental behavioral interventions combining AAC with play-based strategies produce better communication outcomes in minimally verbal autistic children than structured drill approaches alone.
- Sennott, S.C., Light, J.C., & McNaughton, D. (2016). AAC Modeling Intervention Research Review. American Journal of Speech-Language Pathology: A systematic review found aided language input was associated with increases in symbol use, vocabulary size, and multi-symbol combinations in children with complex communication needs.
- U.S. Department of Education, Individuals with Disabilities Education Act (IDEA), 20 U.S.C. § 1400 et seq.: Under IDEA, students with disabilities are entitled to assistive technology, including AAC devices, when needed to access a free appropriate public education; Part C covers children birth to age three.
- AAC-RERC (Rehabilitation Engineering Research Center on AAC), Funding and Policy Resources: AAC-RERC publishes guidance on insurance funding pathways and appeal processes for high-tech speech-generating devices classified as durable medical equipment.
- Centers for Medicare and Medicaid Services (CMS), Speech Generating Devices Coverage Policy: CMS classifies high-tech AAC speech-generating devices as durable medical equipment (DME) covered under Medicare and, with state variation, Medicaid.
- American Academy of Pediatrics (AAP), Policy Statement: Identifying Infants and Young Children With Developmental Disorders in the Medical Home, Pediatrics 2006: AAP recommends systematic developmental surveillance and early referral for speech and communication concerns, supporting early AAC introduction when communication delays are identified.
- Light, J. & McNaughton, D. (2014). Communicative Competence for Individuals Who Require AAC: A New Definition for a New Era of Communication. Augmentative and Alternative Communication: Communicative competence for AAC users requires more than the device but operational, linguistic, social, and strategic competence developed across natural contexts with trained communication partners.