The sentence usually arrives from someone who loves your child. A grandparent at a birthday party, a neighbour on the driveway, occasionally a professional who should know better. If you give him a device, he will stop trying to talk.
It is a reasonable-sounding fear, and it puts you somewhere uncomfortable: defending your child's communication system to a person whose opinion actually matters to you, usually in the middle of a family occasion, usually with no warning.
The useful thing to know is that you are not arguing from instinct. This is the single most studied question in the field, and the answer has been consistent for a long time.
What the research actually found
Millar, Light and Schlosser reviewed the AAC intervention research in 2006, looking at every study that measured what happened to speech production. Across 27 studies, not one participant showed a decrease in speech. The large majority showed gains.
Reviews since have kept landing in the same place. The American Speech-Language-Hearing Association's position is plain: AAC does not hinder speech development, and there is no minimum age, skill level, or set of prerequisites a child has to clear before they are allowed to communicate.
Why it works the other way round
The fear assumes speech and symbols compete for the same slot. They do not.
A child who can finally make themselves understood is a child who gets more turns in conversations, more responses, and more reasons to try. Pressure comes down. The board also gives them the word paired with the spoken model every single time, which is more repetitions of that word than they were getting before, not fewer.
The children who go quiet are usually the ones who tried and were not understood, over and over, until trying stopped being worth it. If you want the evidence on this in more depth, we have written about whether AAC delays speech separately.
What to say when it comes up
You do not need to win a debate, and you will rarely turn someone around in one conversation at a kitchen table. Aiming lower works better. One sentence usually settles it:
"The research on this is quite clear, and it found the opposite. Kids using AAC tend to gain speech, not lose it."
A few things make that go down easier:
- Aim to close the topic, not to convert them. The goal is that the board stops being up for discussion, not that everyone agrees about the science.
- Name the source rather than yourself. ASHA's public guidance on AAC says all of this plainly, and a professional body carries weight in a family disagreement that a parent, unfairly, does not.
- Let it drop after one round. Relitigating it every visit turns your child's voice into a running argument, which is worse for everyone than an unconvinced relative.
Try this
If there is one person in your child's life quietly resisting the board, send them a single sentence about something your child said with it that surprised you. Evidence about your child beats evidence about children.