Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Discrete Specification(also: Discrete Positioning, Grid-Based Positioning)
- In cursor control interfaces, a positioning method where the user selects from a finite set of predefined locations to move the cursor to an approximate position quickly. Examples include grid-based systems where the screen is divided into numbered cells, or ghost cursor systems…
- Dragon NaturallySpeaking(also: Dragon Dictation, Dragon Speech Recognition, Nuance Dragon)
- Dragon NaturallySpeaking is a commercial speech recognition software product, originally developed by Dragon Systems and later acquired by Nuance Communications (now part of Microsoft). It converts spoken words into text and computer commands, enabling hands-free computer…
- DragonDictate(also: Dragon Dictate)
- An early discrete speech recognition system developed by Dragon Systems that allowed users to control computers and dictate text by speaking one word at a time with brief pauses between words. Released in the early 1990s, DragonDictate was one of the first commercially viable…
- Dwell-Based Selection(also: Dwell Selection, Dwell Time Selection)
- An interaction technique used in eye-gaze and head-tracking interfaces in which holding the cursor over a target for a fixed duration (the 'dwell time', typically 300-1000 ms) triggers a selection, replacing the click action that a mouse user would perform. Dwell-based selection…
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