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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Fidelity
An expression of how accurately a representation reproduces its source. A photograph is a high-fidelity visual representation of a scene but loses depth, sound, and smell. In accessibility and content adaptation, fidelity is a critical concern: when content is transformed from…
Functional accessibility
The degree to which a device or interface is usable by a specific user or user profile, either directly or through the addition of assistive technology. A system is functionally accessible for a given user if it enables them to complete their tasks, regardless of whether the…

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