Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- OpenDyslexic(also: Open Dyslexic)
- A free, open-source typeface specifically designed to improve readability for people with dyslexia. The font uses heavier bottom portions on letters to help prevent visual rotation and uses unique letter shapes to reduce confusion between similar characters. However,…
- Orthographic Depth(also: Orthographic Transparency, Spelling Transparency)
- A measure of how consistently a written language maps between its spelling (graphemes) and pronunciation (phonemes). Shallow or transparent orthographies like Spanish, Finnish, and Italian have highly consistent letter-to-sound correspondences, while deep or opaque orthographies…
- Orthographic Depth(also: Orthographic Transparency, Spelling Transparency)
- The degree of consistency in the relationship between letters (graphemes) and sounds (phonemes) in a writing system. Languages with shallow or transparent orthography — like Finnish, Spanish, and Italian — have highly consistent letter-to-sound mappings, meaning words are…
- Orthography(also: Spelling System, Writing System)
- The conventional spelling system of a language, including the rules and patterns that govern how sounds (phonemes) are represented by written symbols (graphemes). Languages vary in orthographic depth: shallow or transparent orthographies like Spanish and Italian have consistent…
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