Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Perceptual Computing(also: Perceptual Intelligence)
- A computing paradigm in which systems use sensors such as cameras, microphones, and motion detectors to perceive and interpret human behaviour, including gestures, facial expressions, speech, and body movement. In accessibility contexts, perceptual computing enables interfaces…
- Personal Delivery Device(also: PDD, Delivery Robot, Autonomous Delivery Robot)
- Personal delivery devices (PDDs) are small autonomous or semi-autonomous robots that travel on sidewalks and pedestrian pathways to deliver food, packages, and other goods. These devices have been granted pedestrian status under traffic code in several US states, giving them the…
- Pico Projection(also: Pico Projector, Pocket Projector, Mini Projection)
- A compact projection technology that enables small, portable devices to project images and information onto nearby surfaces. In accessibility contexts, pico projection offers an alternative to screen-based interfaces by allowing users to project communication props, maps,…
- Plan Recognition(also: Intent Prediction, Action Prediction)
- A technique in human-computer interaction where a system predicts the user's intended action based on patterns in their input behaviour and the current interaction context. By anticipating what the user is likely to do next, the system can weight recognition processes…
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