Which type of AAC does not require an external tool for communication?

Unaided AAC refers to communication methods that do not involve any external tools or devices for expressing needs and ideas. This type of augmentative and alternative communication relies solely on the individual's body, typically using gestures, facial expressions, sign language, or vocalizations.

Individuals using unaided AAC can effectively communicate without the need for equipment or technology. This makes it particularly accessible for those who may have limited resources or situations where using technology is impractical. By utilizing their natural communication abilities, individuals can convey thoughts and emotions through their own body language, making this approach essential for effective interaction in various environments.

The other types of AAC, such as aided AAC, require some form of external support, like books, boards, or speech-generating devices, which distinguishes them from unaided methods. High-tech AAC typically involves sophisticated electronic devices that assist in communication, while light-tech AAC might include simple tools like picture cards.