What Is AAC?
Augmentative and alternative communication (AAC) refers to any method a child uses to communicate when spoken speech is difficult, delayed, or impossible. This includes picture boards, sign language, text-to-speech apps, dedicated speech-generating devices, and even gestures or pointing. AAC is not a last resort, it's a communication pathway that reduces frustration and prevents many behavioral meltdowns before they start.
Children who struggle to express themselves often communicate through behaviors instead. When a child lacks words, they may hit, scream, or shut down entirely. Research shows that up to 30% of children with autism spectrum disorder have minimal spoken language, and many more have significant speech delays. AAC gives these children a voice before desperation drives problem behaviors.
AAC and Emotional Regulation
The connection between communication ability and emotional regulation is direct. A child who cannot request a break, express pain, or say "I'm scared" cannot regulate their emotions effectively. They have no tools except behavior to get their needs met. When you introduce AAC, you're often preventing meltdowns rather than managing them after they occur.
Sensory processing difficulties compound this problem. A child with sensory sensitivities might need to communicate that loud noises hurt or that they need movement breaks. Without AAC, they can only show distress through escalating behavior. Speech-generating devices or picture boards allow them to communicate these needs directly, which is why AAC is considered essential in most ABA therapy frameworks.
AAC Systems and Approaches
- Unaided AAC: Sign language, gestures, and body language that require no equipment
- Aided AAC: Picture exchange systems (like PECS), communication boards, tablets with AAC apps, or dedicated speech-generating devices that produce synthesized or recorded speech
- Low-tech options: Picture boards with Velcro strips, communication wallets, or laminated choice cards that cost $20-100 and work immediately
- High-tech options: Speech-generating devices ranging from $4,000 to $15,000, often covered by insurance with proper documentation
Most children benefit from a combination approach. A child might use a picture board at home, PECS at school, and a speech-generating device for more complex communication. This multi-modal strategy acknowledges that communication needs vary by environment and situation.
AAC in ABA Therapy and Functional Communication Training
In applied behavior analysis (ABA), AAC is central to Functional Communication Training (FCT). Rather than allowing a child to scream to escape a task, FCT teaches them to use AAC to make the same request appropriately. A child learns that pressing a button that says "break" gets the same result as a meltdown, but faster and with less distress. This is not bribery, it's teaching a functional skill.
The PECS protocol (Picture Exchange Communication System) is one specific AAC approach widely used in ABA. Children learn a 6-phase progression from exchanging single pictures to using complex sentence structures. Research supporting PECS shows that approximately 70% of children who complete the program develop speech or improve existing speech skills significantly.
Developmental Considerations
AAC is appropriate at any age and any developmental level. A 2-year-old who isn't talking by 24 months can start with simple picture boards. A 10-year-old with a language disorder can use a sophisticated speech-generating device. Early introduction of AAC does not delay speech development, it accelerates it. Studies show that children with autism who learn AAC early are more likely to develop spoken speech later than those who wait.
Introduction typically happens during speech-language pathology or developmental pediatric assessments. Many states require insurance to cover speech therapy evaluations for children 0-3 under early intervention programs, which often includes AAC recommendations.
Common Questions
- Will AAC prevent my child from learning to talk? No. Research consistently shows the opposite. When a child has a way to communicate successfully, motivation to develop speech actually increases. They understand that communication works and see talking as another tool in their communication toolkit.
- How long does it take for a child to learn AAC? Low-tech systems like picture boards show results within days to weeks. PECS typically takes 2-6 months to establish the first phase. Speech-generating devices require practice but many children begin using core words functionally within 4-8 weeks of consistent exposure.
- What if my child rejects the AAC system? Rejection often means the system doesn't match the child's learning style or interests. A child who loves animals might engage better with an app featuring animal sounds. Work with your speech therapist to adjust the vocabulary, layout, or device type. Forced AAC creates resistance, gentle introduction creates adoption.