Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Passive Infrared Sensor(also: PIR Sensor, PIR, Motion Sensor)
- A passive infrared sensor detects movement by measuring changes in ambient infrared radiation in its field of view — typically body heat from a person moving across the detection zone. PIR sensors are inexpensive, low-power, and require no active emission, which makes them a…
- Personal Assistant(also: Virtual Assistant, Digital Assistant, Voice Assistant)
- A software agent that can perform tasks or provide services based on user commands or queries, typically through voice interaction. Popular examples include Amazon Alexa, Google Assistant, Apple Siri, and Microsoft Cortana, often embedded in smart speakers, smartphones, and…
- Pilot-Passenger Model(also: Pilot/Passenger Framework)
- A model describing household technology dynamics where "pilots" are the users who set up and configure devices, while "passengers" are those who simply use the systems configured for them. In disability contexts, disabled users may be forced into the passenger role due to…
- Prompting System(also: Prompting Device, Task Prompting Technology)
- An assistive technology that provides stepwise guidance through text, images, audio, or video instructions to help individuals complete multi-step tasks such as cooking, personal hygiene, or workplace activities. Prompting systems are widely used to support people with cognitive…
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