Glossary
Searchable terminology from accessibility, web standards, and related fields.
93 results found in Motor Accessibility.
- Speech-Based Cursor Movement (Voice-Controlled Cursor, Voice Cursor Control)
- A technique for moving the on-screen cursor using voice commands rather than physical manipulation of a pointing device. Speech-based cursor movement systems typically use one of two approaches: discr…
- Speed-Accuracy Tradeoff (Speed-Accuracy Trade-off, SAT)
- A fundamental principle of human motor control where increased movement speed leads to decreased accuracy, and vice versa. Users can choose to move quickly and accept more errors, or move slowly and c…
- Spinal Cord Injury (SCI)
- Damage to the spinal cord that results in temporary or permanent changes in motor function, sensation, or autonomic function below the level of injury. Depending on the location and severity, spinal c…
- Stance-Control Orthosis (Stance-control KAFO, SCO, Stance-control knee-ankle-foot orthosis)
- A class of knee-ankle-foot orthoses that lock the knee during the stance (weight-bearing) phase of gait to prevent buckling, but unlock it during the swing phase to allow natural knee flexion. Stance-…
- Submovement (Movement Component, Movement Segment)
- A discrete component of a larger aimed movement, separated from other submovements by pauses or changes in velocity. According to the Optimized Submovement Model from motor performance theory, a rapid…
- Switch Access (Switch Control, Switch Scanning)
- A method of computer and device interaction that uses one or more switches as input devices, designed for people who cannot use standard keyboards, mice, or touchscreens due to motor impairments. Swit…
- Switch Scanning (Scanning Mode, Auto Scanning)
- An input method for assistive technology where options are sequentially highlighted (scanned) and the user activates a single switch to select the currently highlighted item. This enables people with …
- Switch Scanning (Switch Access, Scanning Input)
- An alternative input method in which items on a screen are sequentially highlighted and the user activates a switch to select the desired item when it is highlighted. Switch scanning is used by people…
- Target Selection (Target Acquisition, Pointing)
- The fundamental interaction task of moving a cursor or pointer to a specific location on screen and confirming selection, such as clicking a button or link. Target selection difficulty is affected by …
- Target-Based Navigation (Target-Based Cursor Control, Object-Based Navigation)
- A cursor control method where users identify the desired destination directly by name or label, such as saying "Select Friday" to move the cursor to that word on screen. Target-based navigation can be…
- Tremor (Hand Tremor, Essential Tremor)
- An involuntary, rhythmic shaking movement of one or more parts of the body, most commonly affecting the hands. Tremor can result from various conditions including essential tremor, Parkinson's disease…
- Virtual Keyboard (On-screen keyboard, Soft keyboard, OSK)
- A software-rendered keyboard displayed on screen that allows users to input text by clicking, tapping, or hovering over virtual keys using a mouse, trackball, touchscreen, eye tracker, or other pointi…
- Zoom Interface (Zoom Screen, Zoomable User Interface, ZUI)
- A user interface technique that allows users to magnify a portion of the screen to increase the effective size of interface elements, making them easier to select with low-precision pointing devices s…