Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Activity Theory
- A conceptual framework originating in Soviet psychology (Vygotsky, Leont'ev) and widely applied in HCI, which analyses human action as goal-directed activity mediated by tools, rules, community, and division of labour. Activity Theory provides a structured lens for studying how…
- Design for All(also: DfA, Design pour Tous)
- A European design philosophy that aims to create products, environments, and services usable by the widest possible range of people without adaptation or specialized design. Originating from the European Institute for Design and Disability (now Design for All Europe), this…
- Fleiss's Kappa(also: Fleiss Kappa)
- A statistical measure of inter-rater reliability for categorical ratings assigned by three or more raters, extending Cohen's Kappa beyond the two-rater case. In accessibility research, Fleiss's Kappa is commonly used to validate qualitative coding of user reviews, heuristic…
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