Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Insertion Error(also: Missing Text Error)
- A type of text error where content that should be present is missing, requiring the user to navigate to the correct position and add the missing characters, words, or phrases. Insertion errors are challenging for blind users because determining the exact cursor position for…
- Omission Error(also: Extra Text Error, Deletion Needed Error)
- A type of text error where extraneous or incorrect content is present and needs to be removed. Despite the name suggesting something missing, in text editing research this term refers to errors requiring deletion—the correct text has been "omitted" in favor of erroneous content.…
- Substitution Error(also: Replacement Error, Word Substitution)
- A type of text error where an incorrect word or character appears in place of the intended one. Substitution errors commonly arise from speech recognition misrecognition, autocorrect mistakes, or typing errors. Correcting substitutions requires navigating to the error, selecting…
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