Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Visual Attention Span(also: VAS, Visual Attention Window)
- The number of distinct visual elements that can be processed simultaneously in a single glance. Visual attention span is a cognitive capacity linked to reading ability — when reading, the eyes fixate on a word and the visual attention span determines how many letters can be…
- Visual Attention Split(also: Split Attention, Divided Visual Attention)
- The cognitive challenge of needing to divide visual focus between two or more sources of information simultaneously. For deaf and hard of hearing people, visual attention split is a pervasive accessibility barrier: they must look at captions or a sign language interpreter while…
- Visual Cognition(also: Visual Processing, Visual Perception)
- The set of mental processes involved in perceiving, interpreting, and responding to visual information, including object recognition, spatial awareness, motion detection, and visual attention allocation. Deaf and hard-of-hearing individuals demonstrate heightened visual…
- Visual dispersion(also: Visual splitting, Divided visual attention)
- The cognitive challenge faced by deaf and hard of hearing people when they must simultaneously monitor multiple visual information sources, such as an instructor, presentation slides, a sign language interpreter or captions, and their own notes. Because deaf individuals receive…
- Visual search
- The perceptual task of scanning a visual scene to locate a specific target among distractors. Visual search is significantly affected by low vision, visual field loss, and other visual impairments, as reduced acuity or restricted fields make it harder and slower to locate…
- Visuospatial Attention(also: Visual-Spatial Attention, Visuospatial Processing)
- The cognitive ability to attend to, process, and mentally manipulate visual and spatial information in the environment. Visuospatial attention involves orienting to locations in space, tracking objects, and understanding spatial relationships between elements. Research has…
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