What are the two main categories of AAC?

The classification of Augmentative and Alternative Communication (AAC) systems is primarily divided into two main categories: unaided and aided. Unaided AAC does not require any external tools or devices; it relies solely on the individual's own body, utilizing methods like sign language or facial expressions. In contrast, aided AAC involves the use of external tools or devices to facilitate communication, which can range from low-tech solutions like picture boards to high-tech systems such as speech-generating devices.

Recognizing this distinction is crucial for understanding how different AAC strategies can support individuals with communication challenges. The unaided category focuses on naturalistic forms of communication, while aided systems can provide more diverse and complex language options. Both categories play significant roles in tailoring communication support to meet individual needs.