Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Segmentation Problem(also: Stroke Segmentation, Input Segmentation, Gesture Segmentation)
- The segmentation problem in text entry and gesture recognition refers to the challenge of determining where one input unit (such as a letter, word, or gesture) ends and the next begins when there is no explicit delimiter between successive inputs. For stylus-based systems,…
- Soft Keyboard(also: On-screen Keyboard, Virtual Keyboard, OSK)
- A keyboard displayed on a screen that is operated by a pointing device (mouse, touch, head tracker, eye gaze, or switch) rather than physical key presses. Soft keyboards are essential assistive technology for people who cannot use a standard physical keyboard due to motor…
- Switch Keyboard(also: Scanning Keyboard, On-Screen Scanning Keyboard)
- A switch keyboard is a virtual keyboard interface designed for people with severe motor disabilities who cannot use a standard keyboard or pointing device. It works through a scanning mechanism: a cursor automatically moves across rows and columns of the keyboard, and the user…
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