Augmentative And Alternative Communication (Aac)
Is AAC backed by research evidence?
Yes — augmentative and alternative communication (AAC) is backed by solid research evidence. AAC covers any method beyond speech alone — gestures, picture cards, symbol boards, sign and speech-generating devices — that helps a child communicate. Studies and systematic reviews consistently show AAC improves communication and, importantly, does not stop or slow spoken language; for many children it actually encourages talking. It is a recognised, evidence-based part of speech and language therapy, working best when matched to the individual child and modelled in everyday routines.
When words are hard to find, the right tools and gentle support can open a whole new way for your child to be heard — and yes, the research firmly stands behind it.
In short
Yes — augmentative and alternative communication (AAC) is well-supported by research evidence. AAC means any method, beyond speech alone, that helps a child communicate: gestures, picture cards, symbol boards, sign, or speech-generating apps and devices. Decades of studies show AAC supports communication and, reassuringly, does not stop or slow spoken language — in fact, for many children it encourages talking to develop. It is a recognised, evidence-based part of speech and language therapy worldwide.What the research actually shows
AAC is an umbrella for aided methods (picture exchange, symbol boards, tablets and speech-generating devices) and unaided methods (gestures, sign, body language). Research across many studies and systematic reviews tells us a few clear things. First, AAC can meaningfully improve a child's ability to make requests, share ideas, take turns and connect with others. Second — the question parents worry about most — introducing AAC does not prevent natural speech from emerging; the evidence consistently shows it often supports and increases spoken words. Third, AAC works best when it is matched to the individual child, modelled by familiar adults, and woven into everyday routines rather than reserved for therapy time. It is never "giving up" on speech — it is giving a child a reliable voice now, while other skills keep growing.When AAC is worth exploring
A speech-language therapist may suggest exploring AAC when a child's understanding outpaces what they can say, when speech is unclear or very limited beyond the expected age, or when frustration and communication breakdowns are affecting daily life. AAC suits a wide range of profiles — including autism, apraxia, developmental delay and complex communication needs — and the goal is always total communication: every available route to being understood.The Pinnacle way
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care, never from an app or form. Our speech therapy team assesses how your child communicates today, then chooses and models the right AAC approach as part of a personalised plan you can carry into [home and everyday life](/). Across our network — 70+ centres, 700+ therapists and 25 million+ therapy sessions — AAC is used to build connection, not replace it.Trusted sources
The American Speech-Language-Hearing Association (ASHA) on AAC as evidence-based practice; Cochrane reviews on communication interventions; the American Academy of Pediatrics on supporting children with communication needs.Next step — If your child finds speaking hard, book a speech and communication screening to explore whether AAC could give them a stronger voice today.
What to watch
Understanding that seems ahead of spoken words, speech that stays very limited or unclear beyond the expected age, growing frustration or communication breakdowns in daily life, or a child relying heavily on pointing, pulling or guesswork to be understood.
Try this at home
Model AAC yourself — point to pictures or use simple signs alongside your own speech during routines like snacks and play. Children learn a tool best when they see the adults they love using it too, with no pressure to respond perfectly.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10 · reviewed every 365 days
This is general information, not a diagnosis. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care.
Frequently asked
Will using AAC stop my child from learning to talk?
No — this is the most common worry, and the research is reassuring. Studies consistently show AAC does not prevent speech, and for many children it actually supports and increases spoken words by reducing frustration and building communication confidence.
What counts as AAC?
AAC includes both unaided methods like gestures and sign, and aided methods like picture cards, symbol boards, and speech-generating tablets or devices. The goal is total communication — every available route to being understood.
When should we consider AAC for our child?
A speech-language therapist may suggest AAC when a child's understanding outpaces their speech, when talking is very limited or unclear beyond the expected age, or when communication breakdowns are affecting daily life. A screening helps decide the right approach.