Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- VLAT(also: Visualization Literacy Assessment Test)
- A standardized 53-item test developed by Lee, Kim, and Kwon to measure a person's ability to read and interpret data visualizations across 12 chart types. Widely used as a baseline for comparing visualization literacy between groups and for evaluating the impact of assistive…
- Verbosity Level(also: Verbosity Setting, Detail Level)
- A configurable setting that controls the amount of detail provided in text or audio descriptions of content, particularly for screen reader users and accessible data visualizations. Verbosity levels typically range from low (minimal summary with key points only) to high…
- Vibro-Audio(also: Vibrotactile Audio, Vibro-Tactile)
- Vibro-audio is a multimodal interaction technique that combines vibration feedback from a device's built-in motor with auditory cues to convey information non-visually. On touchscreen devices, vibro-audio enables users to explore graphical content through touch — the device…
- Visual Data Exploration(also: VDE, data visualization exploration)
- Visual data exploration is the interactive process of examining datasets through graphical representations such as charts, maps, and dashboards to discover patterns, trends, and anomalies. Accessibility considerations are critical because conventional visualizations rely…
- Visualization Literacy(also: Data Visualization Literacy, Graphical Literacy, Graph Literacy)
- The ability to read, interpret, and extract meaningful insights from visual data representations such as charts, graphs, maps, and infographics. Visualization literacy encompasses skills like identifying trends, making comparisons, understanding scales and axes, and critically…
- Visualization Question Answering(also: Chart QA, Visualization QA, VisQA)
- A class of interactive systems that let users ask natural-language questions about a data visualization — a chart, graph, or map — and receive direct textual or spoken answers rather than having to interpret the visualization themselves. Visualization QA systems typically…
- VoxLens
- An open-source JavaScript plug-in developed at the University of Washington that improves the accessibility of online data visualizations for screen-reader users through a multimodal approach. VoxLens provides three interaction modes: a Question-and-Answer mode where users can…
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