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…
- Physiological Sensing(also: Biosensing)
- Measuring bodily signals - such as heart rate, galvanic skin response, skin temperature, respiration, or muscle activity - to infer aspects of a user's physical or affective state. Physiological sensing is widely used in accessibility, affective computing, and digital health to…
- Posture Detection(also: Posture Monitoring, Posture Recognition)
- The use of sensors or computer vision to identify and monitor a person's body posture in real time. In assistive technology, posture detection systems can use accelerometers, gyroscopes, or cameras to determine whether a user is sitting, standing, slouching, or hunching, and…
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