Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Egocentric(also: Egocentric Reference Frame, Body-Centred Reference Frame)
- A spatial reference frame in which locations and directions are defined relative to the observer's own body position and orientation. For example, "turn left," "take one step forward," or "the door is on your right" are egocentric descriptions. People with visual impairments…
- Egocentric Spatial Reasoning(also: First-Person Spatial Understanding, User-Relative Spatial Reasoning)
- The ability of a system to understand and describe the spatial positions of objects relative to the user's body and perspective, rather than from a bird's-eye or absolute reference frame. For AI systems assisting blind travelers, egocentric spatial reasoning is critical —…
- Environmental Legibility(also: Legibility of the Environment, Spatial Legibility)
- The ease with which people can perceive, understand, and form mental maps of a physical environment in order to orient themselves and navigate through it. Coined by urban planner Kevin Lynch, legibility refers to the visual clarity of a cityscape or built environment — how…
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