Does AAC delay speech?

No. This is the most researched fear in the field, and the evidence is unusually consistent: AAC does not delay speech — for most children it supports it. Reviews and meta-analyses of AAC intervention studies report that the vast majority of children show speech gains or no change after starting AAC; declines are rare.

Why the fear is so common — and so costly

The worry sounds logical: "if tapping is easier, why would they talk?" But it misunderstands what drives speech. Children speak when communication is rewarding. A child who can't make themselves understood doesn't practice communication more — they give up, or melt down. AAC restores the reward loop: expression → response → more expression. Speech, being faster than tapping, tends to take over wherever it can.

What the research base says

• Meta-analytic reviews of AAC studies (Millar, Light & Schlosser and successors) found no evidence of speech decline; a majority of children increased speech production.
• AAC input is language input: every tapped card is also a clear spoken model, repeated exactly the same way every time — something human speakers can't do.
• Professional bodies (ASHA among them) explicitly recommend AAC alongside speech therapy, not as a last resort after it.

If you're weighing when to begin, see what age to start AAC — the short answer is: not later. Tala is free to start, so testing this for your own child costs nothing.

Frequently asked questions

Will my child stop trying to talk if tapping is easier?

Research says no. Speech remains the fastest, most convenient channel, and children who gain communication success through AAC attempt more communication overall — including spoken. Meta-analyses report speech gains or no change in the large majority of studied children, with declines being rare.

Why do SLPs recommend AAC even for children who might speak later?

Because communication can’t wait for speech. AAC carries language development forward — vocabulary, sentence structure, back-and-forth exchange — so that if speech comes, it lands on a foundation instead of a gap.

Does hearing the phrase spoken aloud help?

Yes. Every tap pairs the concept with a spoken model. Many parents report their child repeating or approximating phrases the app says — the card becomes a speech prompt, not a replacement.