10-Minute Speech Practice That Doesn't Require Sitting Still

Last updated 2026-07-09

What is an AAC device, and who actually needs one?

AAC stands for Augmentative and Alternative Communication. It's an umbrella term for any tool that helps someone communicate when spoken words aren't reliable or aren't there yet. "Augmentative" means adding to speech; "alternative" means replacing it temporarily or permanently.

The American Speech-Language-Hearing Association defines AAC as including "all forms of communication (other than oral speech) that are used to express thoughts, needs, wants, and ideas" ^[1]. That definition is wide on purpose. A handwritten note is technically AAC. So is a $9,000 eye-gaze device.

Who needs one? Children with autism, childhood apraxia of speech, cerebral palsy, Down syndrome, Angelman syndrome, Rett syndrome, or any condition that makes reliable spoken output hard. Late talkers who haven't reached functional speech by age 2 or 3 are also candidates. Speech therapy is almost always happening alongside AAC use, not instead of it.

One thing worth saying directly: AAC does not stop children from learning to talk. A 2006 systematic review published in the American Journal of Speech-Language Pathology found no evidence that AAC inhibits speech development, and some evidence it supports it ^[2]. That's the most common fear parents bring to their first AAC conversation, and the research doesn't back it up.

What are the main types of AAC devices?

The field breaks AAC into four tiers by technology level. Each tier has real tradeoffs.

No-tech AAC needs nothing with batteries or software. Communication boards (a laminated grid of pictures or symbols), PECS books (Picture Exchange Communication System), and sign language all live here. Cost is near zero. Durability is high. The downside is that someone has to design and print everything, and the device can't generate speech output on its own.

Low-tech AAC includes pre-printed books, communication wallets, and symbol-based binders that a child points to. Still no power needed. Good for backup or travel. Vocabulary is limited by how many pages you're willing to carry.

Mid-tech AAC covers single-message or limited-message devices. Think BigMack buttons (a large recordable button that plays back one message when pressed), Step-by-Step communicators (a sequence of recorded messages), and GoTalk devices (grids of recorded symbols). These run on batteries, cost roughly $50 to $300, and require someone to record messages into them. Great for early AAC learners who aren't ready for a full vocabulary system.

High-tech AAC is where most of the conversation (and most of the money) goes. This tier splits into two branches:

• Dedicated speech-generating devices (SGDs): Purpose-built hardware from companies like Tobii Dynavox, PRC-Saltillo, and Lingraphica. These exist solely as communication tools, which matters for insurance coverage. They run full-featured AAC software, often include eye-gaze or switch access, and are built to survive daily use by a child. Prices run from about $2,500 for simpler models to over $10,000 for full eye-gaze systems ^[3].

• App-based AAC on consumer tablets: AAC apps running on an iPad or Android tablet. The hardware costs $300 to $600 and the apps cost $200 to $300 one-time (Proloquo2Go, TouchChat, LAMP Words for Life) or by subscription. The catch is that insurance rarely covers a consumer device for AAC purposes, and an iPad is easy to grab for YouTube.

Most AAC devices fall into one of these tiers. Knowing the tier helps you know what to ask for in an evaluation.

What is the full list of dedicated AAC devices available right now?

This is the part of the internet that's usually out of date or incomplete. Here's what's on the market as of mid-2025, sorted by manufacturer.

Tobii Dynavox Tobii Dynavox is the largest AAC device maker in the US. Their current line-up:

• *I-Series* (I-15+, I-16+): Large-screen high-end eye-gaze SGDs. Typically $8,000 to $10,000+ with the eye-gaze module. Runs Snap Core First or Communicator 5 software.
• *T-Series* (T15A): Touch-access SGD, ruggedized, similar software options. Roughly $6,000 to $8,000.
• *Indi*: Newer, lighter device for active users who need portability. Touch access. Mid-range, around $5,000 to $7,000.
• *Snap + Core First app*: Their software also runs on Windows tablets and iPads (app form, not a dedicated device).

PRC-Saltillo (Prentke Romich Company, merged with Saltillo) PRC-Saltillo is known for language systems based on motor-learning principles, particularly LAMP (Language Acquisition through Motor Planning).

• *Accent series* (Accent 800, Accent 1000, Accent 1400): The flagship dedicated devices. Access by touch, eye gaze, or switch. Prices run about $5,000 to $9,000 depending on access configuration.
• *Nova Chat*: Touch-based, runs ChatEditor software, for users who want a smaller form factor.
• *Dialogue*: Designed for older users and adults with progressive conditions.
• *LAMP Words for Life app*: Their LAMP system also runs as an iPad app, separate from dedicated hardware.

Lingraphica Lingraphica focuses mainly on adults with aphasia and acquired communication disorders, though their devices are used with some children.

• *TalkPath*: App-based platform, subscription model.
• *AllTalk, SmallTalk, MiniTalk*: Dedicated devices with increasing screen sizes. Priced in the $2,000 to $5,000 range.

Ablenet Ablenet makes a range of mid-tech and some high-tech options.

• *QuickTalker Freestyle*: Portable SGD with customizable pages. Around $1,500 to $2,500.
• *BigMack, Jelly Bean*: Classic single-message buttons, $40 to $100.

Enabling Devices Enabling Devices sells mostly low-to-mid tech communication aids: talking picture frames, single-message devices, and simple multi-message communicators. Prices typically $50 to $500.

Attainment Company

• *GoTalk NOW Plus* app and *GoTalk* hardware devices: Popular in schools, simple interface, competitively priced.

Prices above come from manufacturer websites and are approximate; quotes vary by configuration and vendor ^[3][4].

What AAC apps work on an iPad or Android tablet?

Most families reach AAC through apps before they ever try a dedicated device. That's not a bad path. Apps cost far less upfront, and a trial on an app can tell you a lot about what vocabulary system and access method fits a child before you commit to a $7,000 device.

The major AAC apps right now:

Proloquo2Go (AssistiveWare): Probably the most-prescribed app-based AAC system in the US. Grid-based, symbol-supported, deep vocabulary. One-time purchase around $250. iOS only. Works well with switch access and keyboard access.

TouchChat HD with WordPower (Talk to Me Technologies): Strong for users who want a text-based or symbol-plus-text system. WordPower is a vocabulary system designed by a speech-language pathologist with AAC expertise. Around $150 to $200. iOS and some Android support.

LAMP Words for Life (PRC-Saltillo): Built around motor learning, so the same motor pattern always produces the same word. That matters a lot for children with childhood apraxia of speech. Around $300. iOS.

Snap Core First (Tobii Dynavox): Grid-based, strong for early communicators and school-age kids. Subscription, roughly $120 per year. Available on Windows and iOS.

Cough Drop: Open-source AAC app with a subscription for the cloud-sync features. A free tier exists. Runs on multiple platforms. Good budget option.

Gotalk Now (Attainment Company): Simple, visual, popular in early childhood classrooms. Around $30 to $50. iPad only.

TD Snap (Tobii Dynavox): The tablet-only version of their software ecosystem, different from Snap Core First.

One honest note about apps: the vocabulary system matters more than which app you pick. Proloquo2Go running a full core vocabulary and LAMP Words for Life running a motor-learning vocabulary are genuinely different clinical approaches. A speech-language pathologist can help sort out which matches the child's profile. Apps are a starting point, not a shortcut around that evaluation.

How do you choose the right AAC device for a child with autism or a late talker?

This is where most parents get overwhelmed, and where generic "top 10 AAC apps" lists fail them. The right device depends on a handful of factors that a formal AAC evaluation will sort through.

Cognitive and language level. A child just beginning to communicate on purpose (pointing, reaching, early symbols) needs a very different system than a child who has 50 words and wants to combine them. Early communicators often start with a handful of core words on a simple board or big-button device before moving to a full system.

Motor abilities and access method. Can the child reliably touch a screen? If motor control is limited (as in cerebral palsy or significant motor planning difficulties), direct touch may not be the right access method. Switch scanning, eye gaze, and head-tracking are alternatives. This is a clinical decision, not a guess.

Portability. A device that lives at school does nothing for the child at the grocery store. ASHA and most AAC advocates stress that a communication device should be with the child at all times, across every setting ^[1].

Depth of vocabulary. Avoid systems that offer only a small, fixed set of messages. Research on aided language development consistently finds that children communicate more when they have a large, flexible vocabulary from the start, including core words (go, more, want, stop, I, you) that work across contexts ^[5].

Who will support it. A device that a family can't program and maintain ends up in a closet. Software complexity matters. Some families find Proloquo2Go straightforward; others find it overwhelming and do better with a more guided system.

For children on the autism spectrum specifically, research supports deep vocabulary access and communication partner training alongside any device ^[2][5]. The device alone doesn't generate communication. The people around the child, modeling language on the device, matter just as much.

If your child hasn't been evaluated yet, early intervention services (available through IDEA Part C for kids under 3) can include an AAC evaluation at no cost to the family ^[6].

Does insurance cover AAC devices, and how does the funding process work?

Funding is usually the hardest part of getting a high-tech device. Here's how it actually works.

Medicare and Medicaid cover SGDs as durable medical equipment (DME) when medical necessity is documented. Medicare's coverage falls under the DME benefit, and devices must be classified by CMS as "speech-generating devices" to qualify. Medicaid coverage varies by state, but federal Medicaid law requires states to cover "medically necessary" services for children under 21 through the EPSDT (Early and Periodic Screening, Diagnostic, and Treatment) benefit, which ASHA and advocates have used to fund SGDs ^[6][7].

Private insurance covers dedicated SGDs inconsistently. Many plans do cover them under DME when a physician and SLP jointly document medical necessity. Apps on consumer tablets are almost never covered, because insurers class iPads as consumer electronics, not medical equipment.

IDEA (Individuals with Disabilities Education Act) requires schools to provide assistive technology, including AAC devices, when an IEP team decides it's necessary for a student's education. The school owns the device, not the family, and it may not travel home ^[8].

Medicaid waivers: Many states run waiver programs that fund assistive technology including AAC for people with developmental disabilities. Waiting lists can be long, and eligibility varies.

Manufacturer loaner and trial programs: Tobii Dynavox and PRC-Saltillo both run trial device programs. A child can use a device at home for 30 to 60 days while an insurance request is processed. Ask your SLP or the manufacturer's funding specialist about this.

Private grants: The United Cerebral Palsy Foundation, Autism Speaks, and many state disability organizations offer small grants ($500 to $2,000) toward a device purchase.

The funding process usually takes 3 to 6 months from evaluation to device delivery when insurance is involved. Start early, before a school year or a developmental window closes.

What is PECS and how does it compare to other AAC systems?

PECS stands for Picture Exchange Communication System. It's a specific, structured protocol developed by Andy Bondy and Lori Frost in 1985, originally for young children with autism who had limited functional communication ^[9].

The approach has six phases. A child starts by physically handing a picture card to a communication partner in exchange for a wanted item (phase 1), then learns to get a card from a book and bring it to a partner (phase 2), then discriminate between pictures (phase 3), then build simple sentences using a sentence strip (phase 4), and eventually comment and answer questions (phases 5 and 6).

PECS is no-tech, so it costs almost nothing and works anywhere. It also builds intentional communication behavior before introducing technology, which some SLPs prefer as a foundation. A 2011 randomized controlled trial published in the Journal of Child Psychology and Psychiatry found that PECS training increased initiations and vocabulary in children with autism, though effects on overall language acquisition were modest ^[10].

How does PECS compare to high-tech SGDs? The honest answer is that strong comparison data is limited. ASHA's evidence maps note that most AAC studies have small samples and mixed participants ^[1]. What most clinicians land on in practice: PECS can be a useful starting point, especially for children under 3 or 4 who aren't yet ready to navigate a full device, and many children move on to a higher-tech system as their communication develops.

PECS is not a permanent destination for most children. It's one step in building communication. A speech therapy plan that keeps the end goal (deep language access) in sight matters more than loyalty to any single system.

What does an AAC evaluation involve, and where do you get one?

An AAC evaluation is done by a speech-language pathologist, ideally one with specific AAC training and experience. Sometimes an occupational therapist joins for motor access questions. It isn't a quick appointment. Plan for 2 to 4 hours across one or two sessions.

The SLP will assess current communication skills (receptive language, expressive language, functional communication behaviors), motor abilities (pointing accuracy, switch use, eye gaze), vision and hearing, literacy level, and the settings the child is in (home, school, community). They'll trial multiple AAC systems, no-tech and high-tech, to see what the child can actually use.

Out of the evaluation comes a written report recommending a specific device and access method, with documentation to support any insurance or school funding request.

Where to find an AAC-experienced SLP:

• ASHA's ProFind directory at asha.org lets you filter by specialty including AAC ^[1].
• Children's hospitals and university training clinics often have dedicated AAC teams.
• Some school districts have AT (assistive technology) specialists who can start the process.
• Online speech therapy providers increasingly offer remote AAC evaluations, which can work for follow-up or for families in rural areas, though a hands-on trial with physical devices usually needs an in-person visit.

One thing to avoid: buying an app or device before the evaluation. Families often spend $250 on Proloquo2Go before any assessment, then find out their child needs eye gaze or a completely different vocabulary system. The evaluation guides the choice. It doesn't rubber-stamp a choice you already made.

Can kids use AAC and still learn to talk?

Yes. This question comes up in almost every first AAC conversation, and the research keeps giving the same reassuring answer.

The worry is intuitive: if you give a child a device to communicate, won't they stop trying to talk? The data says no. A 2006 systematic review in the American Journal of Speech-Language Pathology, covering 23 single-subject studies, found that AAC did not suppress speech in any participant and that many showed increases in speech output after AAC introduction ^[2]. More recent reviews have found the same thing.

The clinical explanation is that AAC lowers communication frustration. When a child can make their needs known through any modality, the pressure drops, and verbal attempts often go up. The device becomes a scaffold, not a ceiling.

For children with apraxia of speech, this matters even more. Apraxia is a motor planning disorder that makes reliable speech output hard regardless of the child's language knowledge or desire to communicate. AAC gives those children a way to express the language they have while they work on the motor patterns for speech. ASHA's position openly supports using AAC and speech intervention at the same time for this group ^[1].

If your child's SLP or pediatrician has hesitated to recommend AAC because it might "stop the child from talking," that hesitation isn't supported by current evidence. Bringing the 2006 Schlosser and Wendt review to that conversation is a fair move ^[2].

What's the best AAC app or device for a nonspeaking child with autism?

There's no single answer, and anyone who tells you otherwise is oversimplifying. But there are honest patterns from both research and clinical practice.

For nonspeaking autistic children who have functional hand use and can touch a screen: app-based AAC on an iPad is a reasonable and common start. Proloquo2Go and LAMP Words for Life are the most widely prescribed. Both have large vocabulary systems and strong SLP communities around them. LAMP's motor-learning approach fits especially well for children with motor planning difficulties, which overlaps heavily with childhood apraxia of speech.

For nonspeaking autistic children with significant motor differences: a formal evaluation for alternative access methods (eye gaze, switch, head mouse) comes before choosing a device. Tobii Dynavox's I-Series is the most common eye-gaze device in pediatric AAC.

For young children (under 3) just beginning intentional communication: a low-tech board or PECS alongside a few high-frequency buttons (BigMack style) is often a better fit than jumping straight to a full device. Getting early intervention services started before age 3 is the most time-sensitive step ^[6].

Little Words is an AI-based speech companion app for neurodivergent kids that families sometimes use alongside other AAC tools for extra modeling and practice. It isn't a replacement for a dedicated AAC system or an SLP evaluation, but it can add daily practice opportunities. To see whether it fits your child, the start quiz walks through your child's profile.

One pattern most SLPs agree on: whichever system you choose, daily modeling by communication partners (parents, teachers, paraprofessionals) matters more than the device itself. A child shown every day that the device is a real tool for real conversation will use it more than a child who only gets the device handed to them and prompted.

How much do AAC devices cost, and what are the cheapest options?

The range is genuinely enormous, from zero dollars to over $10,000. Here's what you actually get at each price point.

Free or near-free:

• Printed communication boards (you design and print them at home)
• Cough Drop app (free tier)
• The Open AAC ecosystem has free symbol libraries and board builders
• Many SLPs will provide printed core word boards as part of therapy

Under $100:

• BigMack single-message button: $50 to $80
• Step-by-Step communicator (Ablenet): $80 to $120
• Basic GoTalk devices: $100 to $200

$150 to $350:

• TouchChat HD app: $150 to $200
• Proloquo2Go app: $250
• LAMP Words for Life app: $300
• These need an iPad (roughly $330 to $600 more)

$1,000 to $3,000:

• QuickTalker Freestyle (Ablenet): $1,500 to $2,500
• Nova Chat entry configurations: $2,500 to $4,000

$5,000 to $10,000+:

• Full Tobii Dynavox or PRC-Saltillo dedicated SGDs
• Eye-gaze systems at the higher end of this range

The cheapest option a child will actually use beats an expensive device that sits in a bag. Starting low-tech and moving up as the child's needs get clearer is a defensible path, as long as vocabulary access isn't being cut short along the way.

For families who can't afford even mid-range options, chase manufacturer trial programs, school AT funding through IDEA ^[8], and state Medicaid EPSDT ^[7], in that order.

What should parents know before starting AAC with a toddler?

Starting AAC early beats waiting. There's no minimum age. Infants as young as 8 to 10 months can begin learning gestures and simple boards as part of early communication development. The American Academy of Pediatrics supports early referral for communication concerns and AT evaluation as part of developmental monitoring ^[11].

A few things parents should know before that first appointment:

AAC is a language system, not a behavior intervention. The goal is communication access, not compliance or behavior management. A device should be available to the child at all times, including when they're upset, not only during "AAC time."

You'll need training too. Parent and caregiver training in aided language input (also called aided language stimulation) is as important as the child's own training. Research consistently shows that children whose communication partners model AAC have better outcomes ^[5].

Start with core vocabulary. Core words (go, more, stop, want, like, no, help, I, you) make up roughly 80% of what people say in daily conversation. A board or device that holds only fringe vocabulary (names of specific foods, toys, people) limits the child's communication from day one.

Low-tech backup always matters. Even families with a $9,000 device should have a paper backup. Devices break, get left at school, run out of battery. A laminated core word board in a bag costs less than $5 to make.

For a broader picture of how speech and language development fits together, including when delays are common and when they warrant a referral, the early intervention and speech therapy articles on this site cover those foundations.

Frequently asked questions

What is the most commonly used AAC device for children with autism?

Proloquo2Go on an iPad is probably the most prescribed AAC system for autistic children in the US, largely because of wide SLP familiarity and deep vocabulary options. LAMP Words for Life is a close second, especially for children with motor planning difficulties. Dedicated devices from Tobii Dynavox and PRC-Saltillo are common in school settings where insurance funding has been obtained.

At what age can a child start using an AAC device?

There's no minimum age. Communication boards and gestures can start in infancy. Formal AAC device use is documented in children as young as 12 to 18 months. Early intervention services available through IDEA Part C (birth to age 3) can include an AAC evaluation. Starting earlier generally produces better outcomes because communication foundations build on each other.

Will using an AAC device stop my child from learning to talk?

No. A 2006 systematic review across 23 studies found no evidence that AAC suppresses speech development, and many children showed increased vocal output after starting AAC. The relief from communication frustration that a device provides often frees children to attempt more speech. Current ASHA guidance supports AAC use alongside speech therapy, not instead of it.

Does insurance cover AAC devices?

Dedicated speech-generating devices (SGDs) are often covered by Medicaid and private insurance as durable medical equipment when medical necessity is documented by a physician and SLP. Children under 21 are protected by Medicaid's EPSDT mandate. Apps on consumer iPads are rarely covered. The funding process takes 3 to 6 months on average. Manufacturer trial programs can bridge the wait.

What is the difference between an SGD and an AAC app?

An SGD (speech-generating device) is dedicated hardware built solely for communication, like Tobii Dynavox or PRC-Saltillo devices. An AAC app runs on a consumer tablet like an iPad. SGDs are usually insurance-eligible, more durable, and harder to misuse for entertainment. AAC apps are cheaper upfront but rarely covered by insurance and easier for children to turn into YouTube players.

How long does it take to get an AAC device through insurance?

Typically 3 to 6 months from initial evaluation to device delivery when going through insurance. The process includes an SLP evaluation, a physician letter of medical necessity, insurance prior authorization, and sometimes an appeal if the first request is denied. Medicaid approvals can be faster in some states. Manufacturer loaner programs help families get started while the funding request is processed.

Can a child use both PECS and a high-tech AAC device?

Yes, and many do. PECS builds intentional communication behavior and symbol understanding, which often transfers well to a device. Some children use low-tech boards in certain settings (bath time, outdoor play) and a device in others. There's no clinical rule against combining systems. The goal is maximum communication access across all environments, using whatever tools work in each context.

What is core vocabulary and why does it matter for AAC?

Core vocabulary is a small set of words that account for about 80% of everyday language use. Words like go, more, stop, want, like, no, help, I, and you appear across almost every topic. AAC systems built on core vocabulary give children flexible, generalizable language rather than topic-specific phrases. Research consistently shows better communication outcomes when core vocabulary is prioritized from the start.

Is LAMP the same as PECS?

No. LAMP (Language Acquisition through Motor Planning) is a vocabulary and teaching approach based on motor learning theory, designed so that each word always requires the same motor sequence. It runs as software (LAMP Words for Life app) and is used with high-tech AAC. PECS is a low-tech picture exchange protocol with a structured six-phase training sequence. They're different approaches often used at different points in a child's development.

What AAC device does the school district have to provide?

Under IDEA, schools must provide assistive technology, including AAC devices, when the IEP team decides it's necessary for the child's education. The school owns the device and typically decides whether it goes home. Families who want the device at home may need to negotiate that into the IEP or pursue separate funding. An IEP that documents AAC need also supports outside insurance requests.

What is aided language stimulation?

Aided language stimulation (also called aided language input) is when a communication partner models language by pointing to or activating symbols on the child's AAC device during natural conversation, without requiring the child to respond. It's similar to how hearing parents speak to babies before expecting speech back. Research supports it as one of the most effective ways to teach AAC use.

How do I know if my child needs eye-gaze access instead of touch?

Eye-gaze access is used when a child cannot reliably touch or point to a screen due to motor impairment (common in cerebral palsy, Rett syndrome, or severe motor coordination disorders). An AAC evaluation by an SLP and often an occupational therapist will assess pointing accuracy, range of motion, and fatigue. Don't assume a child can't use touch without a proper trial; many children surprise their families.

What are the best free AAC tools available?

The Cough Drop app has a working free tier. The Open AAC initiative provides free symbol sets and board templates. Many SLPs provide printed core word boards as part of early intervention. The website Boardmaker Share has community-shared boards (Boardmaker software itself is paid, but shared boards can sometimes be printed). For a dedicated AAC need, a free tool often isn't enough long-term, but it's a valid starting point.

Can a late talker benefit from AAC even if they might catch up on their own?

Yes. Giving a late talker an AAC tool doesn't lock them into that communication path. Most late talkers who use AAC and catch up simply stop using the device as speech becomes reliable. The risk of withholding AAC while waiting to see if speech develops is a child going months without functional communication, which affects everything from behavior to social development. The downside of trying AAC is nearly zero.

Sources

1. American Speech-Language-Hearing Association (ASHA), Augmentative and Alternative Communication topic page: ASHA defines AAC as including all forms of communication other than oral speech used to express thoughts, needs, wants, and ideas, and supports AAC use across populations including autism and motor speech disorders.
2. Schlosser RW, Wendt O. (2008). Effects of augmentative and alternative communication intervention on speech production in children with autism: A systematic review. American Journal of Speech-Language Pathology, 17(3), 212-230.: A systematic review across 23 single-subject studies found no evidence that AAC suppresses speech development, and many participants showed increases in speech output after AAC introduction.
3. Tobii Dynavox, product pages and pricing information: Dedicated SGDs from Tobii Dynavox range from approximately $5,000 for the Indi to over $10,000 for full eye-gaze I-Series configurations.
4. Drager KD, Light J, McNaughton D. (2010). Effects of AAC interventions on communication and language for young children with complex communication needs. Journal of Pediatric Rehabilitation Medicine, 3(4), 303-310.: Research supports deep vocabulary access from the start and communication partner training as key factors in AAC outcomes for young children.
5. U.S. Department of Health and Human Services, Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) benefit overview: Federal Medicaid law requires states to cover medically necessary services including assistive technology and SGDs for children under 21 through the EPSDT benefit.
6. U.S. Department of Education, IDEA Individuals with Disabilities Education Act, assistive technology provisions: IDEA requires schools to provide assistive technology, including AAC devices, when an IEP team determines it is necessary for a student's education.
7. Bondy A, Frost L. (1994). The Picture Exchange Communication System. Focus on Autistic Behavior, 9(3), 1-19.: PECS was developed by Andy Bondy and Lori Frost originally for young children with autism, using a six-phase structured protocol of picture card exchange.
8. Howlin P, Gordon RK, Pasco G, Wade A, Charman T. (2007). The effectiveness of Picture Exchange Communication System (PECS) training for teachers of children with autism. Journal of Child Psychology and Psychiatry, 48(5), 473-481.: A 2007 randomized controlled trial found that PECS training increased communication initiations in children with autism, though effects on broader language acquisition were modest.
9. American Academy of Pediatrics (AAP), Developmental Surveillance and Screening policy statement: The AAP supports early referral for communication concerns and assistive technology evaluation as part of routine developmental monitoring.
10. AssistiveWare, Proloquo2Go product page: Proloquo2Go is a one-time purchase of approximately $250, available on iOS, with a large grid-based vocabulary system widely prescribed by SLPs.