Glossary
Searchable terminology from accessibility, web standards, and related fields.
69 results found in motor accessibility.
- Target acquisition (Target selection, Pointing task)
- The process of moving a pointer or input device to a specific on-screen element and selecting it, such as tapping an icon, clicking a button, or choosing a menu item. Target acquisition is a fundament…
- Tetraplegia (Quadriplegia)
- A condition resulting from injury to the cervical (neck) portion of the spinal cord, causing partial or complete loss of motor function and sensation in all four limbs as well as the trunk. The extent…
- Touch Accessibility (Touchscreen Accessibility)
- The design and adaptation of touch-based interfaces to be usable by people with diverse motor, sensory, and cognitive abilities. Touch accessibility addresses challenges including insufficient target …
- Touch Drift (Finger Drift)
- The displacement of a finger's contact point on a touchscreen between the initial finger-down position and the final finger-up position during a single touch interaction. Touch drift measures how far …
- Touch target (Tap target, Touch target size, Target size)
- The interactive area on a touchscreen or pen-based display that responds to user input when tapped or pressed. Touch target size is a critical accessibility consideration because targets that are too …
- Trackball
- A trackball is a pointing device consisting of a ball housed in a stationary socket that the user rotates to move the on-screen cursor, with buttons nearby for clicking. Unlike a mouse, a trackball do…
- Upper Body Motor Impairment (Upper Limb Impairment, Upper Extremity Disability)
- A condition affecting the motor function of the arms, hands, or upper body that limits or prevents the use of standard input devices such as keyboards, mice, and touchscreens. Upper body motor impairm…
- Variable Pointing Performance (Variable Pointing Ability, Intermittent Pointing Difficulty)
- A condition where a person's ability to accurately use a pointing device (such as a mouse, trackpad, or touchscreen) fluctuates over time due to factors like physical impairments, fatigue, medication …
- Vocal Programming (Voice Coding, Speech-Based Programming, Voice Programming)
- The practice of writing, editing, and navigating computer code using speech recognition rather than keyboard input. Vocal programming is an important accessibility concern because conventional softwar…