Glossary
Searchable terminology from accessibility, web standards, and related fields.
69 results found in motor accessibility.
- Ability-based calibration (Adaptive calibration, Movement range calibration)
- The process of adjusting a technology system's input sensitivity and thresholds to match an individual user's physical capabilities and range of motion, rather than assuming a normative body. In motio…
- Age-Related Dexterity Changes (Motor Decline in Aging, Age-Related Motor Impairment)
- The gradual decline in fine motor control, hand-eye coordination, and manual dexterity that commonly occurs with aging, affecting the ability to use input devices like mice, keyboards, and touchscreen…
- Ambiguous keyboard (T9 input, Multi-tap disambiguation)
- A text entry method in which multiple letters are mapped to each physical key, requiring disambiguation algorithms (typically dictionary-based) to determine the intended word from the sequence of key …
- Apraxia (Apraxia of Speech, Childhood Apraxia of Speech, CAS, Verbal Apraxia, Dyspraxia)
- A motor speech disorder in which the brain has difficulty coordinating the muscle movements needed to produce speech, despite the muscles themselves not being weak. The person knows what they want to …
- AssistiveTouch
- An iOS accessibility feature that provides an on-screen menu of customizable touch-based shortcuts, allowing users to perform gestures and actions that might otherwise require physical buttons or comp…
- Bite Switch (Bite Button, Mouth Switch)
- An assistive input device consisting of a small button held in the mouth and activated by biting down on it, used by people with severe motor impairments who cannot operate hand-held controllers or sw…
- Bradykinesia (Slowness of Movement)
- Bradykinesia is a motor symptom characterized by slowness of movement and a progressive reduction in the speed and amplitude of repetitive actions. It is one of the cardinal symptoms of Parkinson's di…
- Brain-Computer Interface (BCI, Brain-Machine Interface, BMI, Neural Interface)
- A technology that enables direct communication between the brain and an external device by detecting and interpreting neural activity, typically through electroencephalography (EEG) or electromyograph…
- Browsing Fatigue (Navigation Fatigue, Screen Reader Fatigue)
- Physical and cognitive exhaustion experienced by users — particularly screen reader users and those with motor impairments — when navigating web content through repetitive, effortful interactions. For…
- Bubble Cursor (Area Cursor, Enhanced Area Cursor)
- An assistive pointing technique where the cursor's activation area is dynamically enlarged to make it easier to select targets on screen. Rather than requiring precise pixel-level accuracy, a bubble c…
- Carpal Tunnel Syndrome (CTS, Carpal Tunnel)
- A condition caused by compression of the median nerve as it passes through the carpal tunnel in the wrist, resulting in numbness, tingling, weakness, and pain in the hand and fingers. Carpal tunnel sy…
- Chairable computing (Chairable input, Wheelchair-integrated computing)
- A design paradigm in which input devices and computing interfaces are integrated into the form factor of a wheelchair — particularly armrests, trays, and frames — analogous to how wearable computing f…
- Click-on-Lift (Lift-off Activation, Release Activation)
- An interaction technique where a touch target is activated only when the user lifts their finger from the screen while still within the target area, rather than registering the action at the point of …
- Disambiguation (Target Disambiguation, Touch Disambiguation)
- In accessible interface design, disambiguation is the process of resolving ambiguity when a user's input could correspond to more than one interactive target. This commonly occurs on touchscreens wher…
- Dwell Selection (Dwell Click, Dwell Time Selection, Hover Click)
- An interaction technique where a user activates or selects an on-screen element by keeping a cursor, gaze point, or pointer within the target area for a specified duration (the dwell time), rather tha…
- Dyskinesia (Levodopa-Induced Dyskinesia, LID)
- A movement disorder characterized by involuntary, uncontrollable movements such as twitching, swaying, or jerking, most commonly associated with long-term use of levodopa medication for Parkinson's di…
- Electromyography (EMG, Electromyogram)
- Electromyography (EMG) is a technique for measuring the electrical activity produced by muscles when they contract or are at rest. In accessibility and assistive technology, EMG sensors placed on the …
- Enhanced Area Touch (Area Touch, Expanded Touch Area)
- A touchscreen interaction technique that enlarges the effective touch point from a single pixel to a larger circular area, expanding both the motor space (the physical area the user needs to target) a…
- Essential Tremor (ET, Benign Essential Tremor)
- Essential tremor is one of the most common movement disorders, characterized by involuntary, rhythmic shaking that typically affects the hands and arms but can also involve the head, voice, and other …
- Eyelid Gesture (Eyelid Interaction, Eyelid-Based Input)
- An eyelid gesture is a deliberate eye movement used as an input method for controlling digital devices, involving intentional opening and closing of one or both eyelids in specific patterns, sequences…