Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Bio-Electrical Signal(also: Biosignal, Bioelectrical Signal, Physiological Signal)
- A bio-electrical signal is an electrical potential generated by biological processes in the human body, including muscle contractions (EMG), brain activity (EEG), eye movements (EOG), heart rhythms (ECG), and skin conductance (GSR). In assistive technology, bio-electrical…
- Biometric Control(also: Biometric Input, Physiological Control Interface)
- The use of measurable biological signals from the human body — such as brain waves (EEG), skin conductance (galvanic skin response), muscle electrical activity (EMG), heart rate, or eye movements — as input channels for controlling computers and assistive technology devices.…
- Biosensor(also: Physiological Sensor, Biometric Sensor)
- A device that detects and measures biological or physiological signals from the body, such as heart rate, skin conductance, temperature, or movement. Wearable biosensors are increasingly used in accessibility applications to monitor the physiological states of individuals who…
- Electrodermal Activity(also: EDA, Galvanic Skin Response, GSR)
- The variation of electrical conductance in the skin caused by sweat gland activity, which is controlled by the sympathetic nervous system. EDA is used as a physiological measure of emotional arousal and stress, with applications in accessibility research for understanding the…
- Multimodal Sensing(also: Multi-Modal Sensing)
- The simultaneous capture of data through multiple sensor channels - for example, combining physiological signals (heart rate, galvanic skin response, skin temperature) with behavioural signals (motion, audio, button input, pressure) - to produce a richer picture of a user's…
- 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…
- Skin Conductance(also: SC, Skin Conductance Response, SCR)
- A measure of the electrical conductance of the skin, which increases with sweat gland activity. Skin conductance is commonly used as an index of emotional arousal or sympathetic nervous system activation. In accessibility contexts, wearable sensors measuring skin conductance can…
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