Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Latent Semantic Analysis(also: LSA, Latent Semantic Indexing, LSI)
- A natural language processing technique that uses mathematical methods (Singular Value Decomposition) to identify patterns in relationships between words and concepts within a large corpus of text. In accessibility applications, LSA enables context-aware word prediction by…
- Linear Scanning(also: Row-column scanning, Automatic scanning)
- An input method for AAC devices and on-screen keyboards where selections are highlighted sequentially, typically row by row and then item by item, allowing users with severe motor impairments to select options using a single switch. The system automatically moves through options…
- Single-Switch Access(also: One-switch access, Single switch scanning)
- An input method that allows users to control a computer, AAC device, or other technology using only one switch or button. Users with severe motor impairments who cannot operate a keyboard, mouse, or touchscreen can use various switch types—including buttons pressed by hand,…
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