Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Just-Noticeable Difference(also: JND, Difference Threshold, Differential Threshold)
- The smallest detectable difference between two stimuli that a person can perceive. In accessibility contexts, JND is commonly applied to color, contrast, and audio levels—determining the minimum change needed for users to distinguish between two values. For color vision, JND…
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