AAC - Research Evidence
Decades of evidence point the same direction: starting AAC early supports communication and language, and does not hold spoken words back.
Why we start early
The early years are a critical window for language. The research below summarizes what we know about introducing AAC during this period – and why “wait and see” carries real risk.
Speech ↑
AAC does not hinder talking
A landmark review found AAC use was associated with gains, not losses, in natural speech for most children. Introducing it early removes the “wait and see” risk.
Birth - 3
The earlier, the better
The early years are a critical window for language. Aided language input during this period builds both comprehension and expression before frustration sets in.
Daily
Modeling drives outcomes
Children learn AAC the way they learn speech, by seeing it used. Consistent aided language modeling in routines is the strongest predictor of progress.
Start with these short, readable articles
For families and providers who want the bigger picture of AAC in early intervention.
Early Intervention & AAC: What a Difference 30 Years Makes
How three decades of research and practice reshaped when and how we bring AAC to the youngest communicators.
AAC with Energy - Earlier
The case for an energetic, early start: building communication into daily life from the very beginning.
Augmentative Communication & Early Intervention: Myths & Realities
A clear-eyed look at the assumptions that hold AAC back — and what the evidence actually says.
Let's dispel some common myths
Each of these comes up often with families and providers. Here’s what the research evidence actually shows.
“Using AAC will keep my child from learning to talk.”
Research consistently finds the opposite: AAC does not stop speech, and many children produce more spoken words after starting AAC. It gives a child a way to communicate while speech develops.
Supported by Millar, Light & Schlosser (2006)
“My child is too young for AAC.”
There is no minimum age. Infants and toddlers benefit from early access to communication tools, and early exposure supports language before frustration takes hold.
Supported by Romski & Sevcik
“Children need certain skills before they can use AAC.”
The “prerequisite skills” idea is outdated. No skills must be mastered first — communication is a basic right, and AAC can begin alongside other learning.
Reflected in current AAC practice
“AAC is a last resort, only after speech has failed.”
AAC is a first line of intervention that builds a foundation for spoken language – not a sign of giving up on speech.
Romski (2005)
“A high-tech device is always the best option.”
The best system is the one that fits the child and family. No-tech, low-tech, and high-tech tools often work together, and needs change over time.
Person-centered AAC practice
“AAC is too hard for families to use at home.”
With coaching, families model AAC successfully in everyday routines — and that consistent, real-life modeling is one of the strongest predictors of a child’s progress.
Caregiver-implemented AAC research