When families start AAC, the first words they teach are usually requests. "Want." "More." "Eat." "Play." That makes sense. Requesting is motivating, it gets the child something they like, and it's easy to practice. (For a full list of those early words, see core words to teach first.)
But there's a category of words that matters just as much, maybe more. Protest words. "No." "Stop." "Don't want." "All done." "Go away."
These are the words that let a child push back, set boundaries, and express discomfort. And they're exactly the words that, when missing, lead to hitting, biting, screaming, and throwing.
Why Protest Vocabulary Matters So Much
Think about what happens when a child doesn't want something and has no way to say so.
A food they dislike appears on their plate. They can't say "no" or "don't want." An activity ends before they're ready. They can't say "more" or "not done." Someone touches them or gets in their space. They can't say "stop" or "go away."
What can they do? They can push the plate away, scream, hit, bite, or melt down. These behaviors are communication. The child is saying "no" the only way they know how.
Carr and Durand (1985) demonstrated this in their foundational research on functional communication training (FCT). They showed that when children were given a communicative alternative to challenging behavior, the behavior decreased significantly. The logic is straightforward. If a child can say "stop" with their device and the adult responds, they don't need to scream to get the same result.
Which Protest Words to Teach First
Not all protest words carry the same weight. Start with the ones your child needs most often, based on what they're currently "saying" through behavior.
Here's a practical starting list:
| Word | What it replaces | When it's useful |
|---|---|---|
| no | Head shaking, pushing away, screaming | Refusing food, activities, requests |
| stop | Hitting, biting, crying | When something is happening they don't like |
| don't want | Throwing food or objects | Rejecting specific items or activities |
| all done | Leaving the table, melting down at transitions | When they're finished with something |
| go away | Pushing people, hiding | When they need space |
| help | Crying, frustration tantrums | When a task is too hard |
"Help" isn't strictly a protest word, but it belongs in this group because it addresses a major source of frustration. A child who can't open a container and can't ask for help will eventually throw the container.
Start with one or two
If your child is new to AAC, don't introduce all six at once. Pick the one or two that would have the biggest impact right now.
Ask yourself: what behavior am I seeing the most? If your child hits during activities they don't like, "stop" and "all done" are your priority. If they throw food at mealtimes, "no" and "don't want" come first. Match the vocabulary to the behavior you're already seeing.
How to Teach Protest Words
Teaching "want cookie" is easy because you can hold up a cookie. Teaching "no" is trickier because you need to create situations where "no" is the right response, and then honor it immediately.
Create natural opportunities
You don't need artificial drills. Protest opportunities happen constantly throughout the day.
Offer something they don't like. During snack time, offer a food you know they'll reject alongside a preferred food. When they show signs of refusal (turning head, pushing away), model "no" or "don't want" on the device. Then remove the non-preferred food immediately.
Give too much of something. Pour too much milk. Stack too many blocks on their tower. Play a song they don't like. These "errors" create natural opportunities for protest.
Do something silly or wrong. Put their shoe on your hand. Put a hat on the dog. When they react, model "no!" or "silly" or "not that." This keeps it playful.
Wait for transitions. When it's time to leave the park or turn off a video, pause before forcing the transition. Model "all done" on the device. Even if you still need to leave, you've created a moment where the child sees the transition word.
Model, then honor
This is the most important part. When you model a protest word and the child uses it (or even approximates it), you must honor it.
If they tap "no" when you offer broccoli, don't give them broccoli. If they tap "stop" during a tickle game, stop immediately. If they tap "all done" during a puzzle, let them be done.
This is how the child learns that protest words have power. If "no" doesn't actually mean no, they'll go back to the behaviors that do work.
But what if I can't honor it?
Sometimes you can't. The child says "no" to getting in the car seat, but you still need to drive somewhere. The child says "all done" with toothbrushing after three seconds.
In these cases, acknowledge the communication, then redirect.
"I hear you. You said no. You don't want the car seat. I know. We still need to go. We can [preferred activity] when we get there."
The key is that you acknowledged what they said. You didn't ignore the "no." You validated it and then explained what's happening. Over time, this builds trust that the device is always worth using, even when the answer can't always be yes.
When Kids "Misuse" No
A common concern: "My child says 'no' to everything now. Even things they actually want."
This is normal, and it's actually a good sign. Here's what's happening.
They're experimenting
Your child just discovered a word that makes things happen. Of course they're going to use it constantly. This is the same thing hearing toddlers do when they discover "no" around age two. They say it to everything because they're testing the word's power and boundaries.
This phase passes. Let them experiment. Respond to each "no" as if it's genuine. If they say "no" to a cookie they clearly want, say "Okay, no cookie," and put it away. They'll figure out quickly that "no" has real consequences and start using it more accurately.
They don't have the right word yet
Sometimes "no" is the closest word available for what they actually mean. They might mean "not that one" or "I want the other one" or "wait" or "I'm not ready." If "no" is the only protest word they have, it has to cover all of those meanings.
The solution is to expand their protest vocabulary. Add "wait," "not that," "different," and "later." The more precise their options, the more accurately they'll communicate.
They're testing you
This is also normal and healthy. Your child is learning that they have a voice. They want to see if that voice is respected consistently. Testing is how children build trust in their communication system.
Stay consistent. Honor the "no." The testing phase ends when the child trusts that the system works reliably.
Beyond No: Building a Full Protest Vocabulary
Once "no" and "stop" are established, expand the protest vocabulary to give your child more nuanced ways to express refusal and discomfort.
"Not that one" lets them reject a specific item without rejecting the whole category. They don't want the blue cup, but they do want a cup.
"Wait" lets them delay without refusing entirely. They'll eat dinner, just not right now.
"Too much" lets them express being overwhelmed. The noise is too loud. The hug is too tight. The activity has gone on too long.
"Scared" and "hurt" express the reason for protest, not just the protest itself. These words let adults understand what's wrong and respond appropriately.
"I need a break" is a powerful phrase for older AAC users. It requests space without requiring a meltdown to get it.
The Connection to Behavior Reduction
The research on this is clear and consistent. When children gain functional communication alternatives to challenging behavior, those behaviors decrease with AAC.
Walker and Snell (2013) reviewed studies on communication-based interventions for individuals with intellectual disabilities and found strong evidence that teaching communicative alternatives reduced problem behaviors. The most effective interventions targeted the specific communicative function of the behavior. If the behavior was escape-motivated (the child was trying to get away from something), teaching escape-related words like "stop" and "all done" produced the best results.
Drager, Light, and McNaughton (2010) found that early AAC intervention, which included protest vocabulary, was associated with reduced frustration and improved behavior in young children with complex communication needs.
This isn't about behavior management. It's about giving a child the tools they need to advocate for themselves. When they can say "stop," they don't need to hit. When they can say "all done," they don't need to throw things. The behavior was never the problem. The missing words were.
A Note for Communication Partners
Teaching protest words requires adults to be comfortable hearing "no." This can be harder than it sounds.
Parents and teachers are used to directing children. "Eat your vegetables." "Sit down." "Come here." When a child suddenly has the ability to refuse, it shifts the dynamic. That's uncomfortable for some adults.
But this discomfort is worth sitting with. A child who can say "no" is a child who can set boundaries, express preferences, and advocate for themselves. These skills matter far beyond childhood. They're the foundation of self-determination.
Every person deserves the right to say "no." AAC makes sure that right extends to children who can't say it with their mouths.
Download SabiKo free and start teaching protest words today.
References
- Carr, E.G., & Durand, V.M. (1985). Reducing behavior problems through functional communication training. Journal of Applied Behavior Analysis, 18(2), 111-126.
- Walker, V.L., & Snell, M.E. (2013). Effects of augmentative and alternative communication on challenging behavior: A meta-analysis. Augmentative and Alternative Communication, 29(2), 117-131.
- Drager, K.D.R., 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.