AAC Systems & Implementation
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AAC Classification
| Category | Description | Examples |
|---|---|---|
| Unaided | No external equipment; uses the body | Gestures, manual signs, facial expressions, vocalizations |
| Aided: Low-tech (light-tech) | Non-electronic external supports | Communication boards and books, PECS books, eye-gaze boards; tangible symbols (real or partial objects, textures; often used with people who are deafblind or have combined visual and cognitive impairments) |
| Aided: Mid-tech (tier in many texts) | Simple devices with recorded speech | Single-message voice-output devices (e.g., BIGmack), sequential-message devices |
| Aided: High-tech | Speech-generating devices (SGDs) | Dedicated devices (e.g., Tobii Dynavox, PRC-Saltillo), tablets with AAC apps |
ASHA groups aided AAC as low-tech/light-tech versus high-tech and counts single-message devices as high-tech; many texts use a mid-tech tier. A BIGmack is a voice-output device, not a switch; a switch is an input that activates a device or runs a scan.
The rest of this outline 13
- Key AAC Terminology
- Symbol Representation Hierarchy
- Language Representation and Displays
- Rate Enhancement and Speech Output
- Unaided Systems
- PECS (Picture Exchange Communication System)
- Access Methods
- Vocabulary Selection
- AAC Assessment & Implementation
- AAC & Motor Learning Principles
- Literacy for AAC Users
- Common Traps
- Sources to Know
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