Giving a Voice to Individuals with Limited to Non-Verbal Communication: How Speech Therapists Use AAC to Support Communication

Speech Pathology
Written By Vanessa

Communication is more than just speaking and listening. It includes a wide range of ways individuals express and understand meaning, such as gestures, pointing, facial expressions, body language, reading, writing, and the use of communication systems. For some individuals, spoken language alone may not be the most effective or accessible way to communicate, which is where alternative communication methods can play an important role.

For many individuals—especially those with limited to non-verbal communication or significant speech delays—the world can be incredibly frustrating when spoken language is not functional. They may communicate through crying, challenging behaviours, or physically guiding a communication partner to express their needs.

At Spyria Therapy, our allied health team in Sydney frequently works with families who feel overwhelmed by these communication barriers. Fortunately, modern technology has opened an incredible pathway through high-tech Augmentative and Alternative Communication (AAC) systems.

In this article, we explore how speech pathologists use AAC systems to support communication, address common misconceptions, and explain how these clinical tools are implemented in therapy.

What is AAC and Who is it For?

AAC stands for Augmentative and Alternative Communication. “Augmentative” means supporting or adding to existing communication skills, while “alternative” means providing another way to communicate when spoken language is not functional.

High-tech AAC refers to specialised software installed on electronic devices such as tablets (e.g., iPads) that converts selections into spoken output. These are commonly referred to as Speech-Generating Communication Systems.

Who benefits from AAC?

AAC is not limited to a single diagnosis. It supports individuals with a wide range of developmental and communication profiles, including:

  • Autism Spectrum Disorder (ASD) – individuals who may be non-verbal or have limited functional communication.

  • Childhood Apraxia of Speech – individuals who understand language but experience difficulty planning and producing speech movements.

  • Cerebral Palsy or motor-based differences – individuals whose physical access impacts spoken communication.

  • Global Developmental Delay (GDD) – individuals who benefit from visual language systems to support understanding and expression.

 

A Deep Dive into Leading AAC Systems Used by Speech Pathologists

Different AAC systems use different language organisation approaches and layouts. Below are three commonly used, evidence-based systems that speech pathologists may assess and implement in therapy:

1. LAMP Words for Life® (Motor Planning System)

Core principle:

LAMP is based on motor learning. Each word has a consistent location and movement pattern, allowing users to build automatic communication skills over time—similar to typing or using a familiar application.

Best suited for:

Individuals who benefit from consistency, repetition, and motor-based learning, particularly those with autism or complex communication needs.

Take a look inside one of our therapy sessions! In this video, our Certified Speech Pathologist, Vanessa, is working alongside a wonderful child using LAMP Words for Life®. LAMP is an evidence-based AAC (Augmentative and Alternative Communication) approach structured around motor planning, helping non-verbal or minimally verbal children find their voice. Watch how we use real-time modeling and interactive play to turn a tablet into a powerful tool for functional, everyday communication.

2. Proloquo2Go® (Symbol-Based AAC System)

Proloquo2Go is a widely used symbol-supported AAC system featuring a structured grid layout with visual icons representing words, concepts, and grammar.

Core principle:

It uses a core vocabulary system (Crescendo) that grows with the individual, starting from a small number of symbols and expanding as language skills develop.

Best suited for:

Individuals who benefit from visual categorisation and structured symbol-based language systems.

3. TD Snap® (Core Vocabulary System)

TD Snap is a flexible AAC system focused on core vocabulary—high-frequency words used across everyday communication contexts.

Core principle:

It combines core words with quick phrases to support both functional communication and social interaction.

It can also integrate with eye-gaze or switch access for individuals with physical access needs.

Best suited for:

Individuals developing functional communication, literacy foundations, and flexible language use.

"Contact Spyria Therapy today to book a mobile speech pathology consultation across Sydney."
 

The Speech Pathologist’s Perspective: How AAC is Used in Therapy

A common misconception is that AAC is simply a communication tool that is handed to an individual to use independently. In reality, AAC is a language system that requires modelling, teaching, and ongoing support.

At Spyria Therapy, we use a structured, evidence-based approach:

1. Feature Matching

We assess each individual’s communication profile, including language abilities, attention, sensory needs, and access requirements. We adopt a collaborative approach with occupational therapists and other relevant professionals to ensure the most appropriate AAC system is selected.

2. Aided Language Input (Modelling)

We consistently model AAC use during interaction. For example, the therapist may select “GO” on the system while saying “Go!” during play. This helps the individual learn how language is used in meaningful, real-life contexts.

3. Core Vocabulary Focus

AAC is not limited to requesting items. We use AAC systems to support a full range of communication functions, including:

  • requesting

  • commenting

  • refusing

  • asking questions

  • social interaction

 

Busting Common Misconceptions

When a speech therapist first suggests an AAC Device, it is completely normal for parents to experience a wave of worry. Let’s address the two most common myths we hear in our Sydney clinic:

Myth 1: “AAC will stop speech development.”

Research consistently shows that AAC supports communication development and does not prevent spoken language development. In many cases, it reduces frustration and increases communication attempts.

Myth 2: “AAC is just screen time.”

AAC use is active, functional communication—not passive screen exposure. It requires social interaction, joint attention, and real-time communication between partners.

 

Final Thought: Communication is a Human Right

Every individual deserves a way to express their thoughts, needs, and identity. AAC systems are not a replacement for spoken language—they are a bridge to communication, participation, and independence.

At Spyria Therapy, we support individuals and families across Sydney by not only introducing AAC systems, but also coaching communication partners to embed AAC into everyday environments at home, school, and the community.

If an individual is experiencing limited to non-verbal communication, early AAC intervention can significantly support their ability to connect with the world around them.

 

References & Academic Resources for Families:

Vanessa

Founder & Senior Speech Pathologist at Spyria Therapy

http://spyria.com.au
Next

Are Screens Changing Our Kid’s Brains? Here’s What the Research Says