What are the two main types of AAC systems?

The distinction between unaided and aided systems is fundamental in the field of Augmentative and Alternative Communication (AAC). Unaided systems rely on the user’s body to communicate, incorporating methods such as gestures, sign language, or facial expressions. These systems do not require any external devices or tools and are entirely dependent on the user's physical capabilities and knowledge of communication techniques.

In contrast, aided systems utilize external tools or devices to facilitate communication. These can range from low-tech options like picture boards and symbol cards to high-tech speech-generating devices equipped with sophisticated software. Aided systems typically provide a wider array of communication options and can accommodate individuals with various levels of speech and language abilities.

This dual classification is crucial for assessing individual needs and selecting the most appropriate AAC system for effective communication. Each type has its applications depending on user capabilities, preferences, and the specific contexts in which communication takes place. Understanding this classification aids professionals in developing tailored intervention strategies that enhance communication for individuals requiring AAC support.