Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 286 of 333
- Table accessibility (Accessible tables, Data table accessibility)
- The practice of structuring data tables so they can be understood by assistive technology users. Accessible tables require proper markup that distinguishes header cells from data cells, establishes re…
- Table navigation (Table browsing, Grid navigation)
- A set of screen reader commands that allow users to move between cells, rows, and columns within HTML tables, hearing row and column headers announced for context at each position. Effective table nav…
- Table-to-Prose (Table-to-Prose Transformation, Tabular Data Narration)
- The process of converting structured tabular data into natural language prose descriptions that can be easily understood when read aloud or presented through speech synthesis. Table-to-prose transform…
- Tablet Input (Graphics Tablet, Pen Tablet, Digitizer Tablet)
- An input device consisting of a flat surface that detects the position and movement of a stylus or digital pen, translating physical writing and drawing motions into digital input. Graphics tablets (s…
- Tablet PC (Tablet Computer, Pen Tablet)
- A portable computing device featuring a touchscreen display that can be operated with fingers, a stylus, or both. For accessibility purposes, tablets offer several advantages: adjustable screen angle …
- Tabular Data (Table Data, Structured Data)
- Information organized in a grid of rows and columns, commonly found in spreadsheets, databases, and HTML tables. For accessibility, tabular data must be properly structured with row and column headers…
- Tactile Accuracy
- Tactile accuracy is an evaluation criterion for measuring how well a person perceives the shape information of an object in a tactile image through touch. Unlike "naming accuracy" (whether someone can…
- Tactile Acuity (Touch Acuity, Tactile Resolution)
- The ability to perceive and discriminate fine spatial details through the sense of touch, analogous to visual acuity for sight. Tactile acuity varies across body regions, with fingertips having the hi…
- Tactile Aid (Tactile Learning Aid, Tactile Tool)
- A physical object designed to convey information through touch, used to make visual or abstract concepts accessible to people who are blind or have low vision. Tactile aids can include raised-line dra…
- Tactile Animation (Animated Tactile Graphics, Tactile Motion Graphics)
- A sequence of tactile images displayed over time on a refreshable tactile display to convey motion, change, or dynamic processes through touch. Unlike static tactile graphics, tactile animations allow…
- Tactile Art (Touch Art, Haptic Art)
- Pictures, illustrations, sculptures, and multimodal compositions that are created to be accessible through the sense of touch, either crafted intentionally for touch-focused experiences or made access…
- Tactile Authoring (Tactile Graphic Authoring, BLV Authoring)
- The creation of tactile graphics — raised-line drawings, swell-paper images, or refreshable-display renderings — by or with blind and low-vision authors, rather than exclusively by sighted experts. Ta…
- Tactile Ballot (Tactile Voting Device, Tactile Template, Tactile Sleeve, Braille Sleeve)
- A physical overlay, sleeve, or template placed over a paper ballot that provides raised, cut-out, or braille markings aligned with ballot boxes so that blind and low-vision voters can locate candidate…
- Tactile Captions (Haptic Captions, Vibrotactile Captions)
- An enhanced captioning approach that supplements traditional text-based captions with vibrotactile feedback, allowing deaf and hard of hearing viewers to feel non-speech sounds (such as phone rings, d…
- Tactile Contrast
- The degree of perceptible difference between adjacent or co-occurring tactile elements, analogous to visual contrast in graphic design. In tactile graphics, sufficient contrast between neighboring reg…
- Tactile Data Comics (TDC)
- A presentation method for accessible education that combines step-by-step tactile graphics on a refreshable tactile display with synchronized verbal narration. Inspired by visual data comics, tactile …
- Tactile Diagram (Raised Diagram, Embossed Diagram)
- A diagram rendered in a tactile format that can be explored through touch, typically using raised lines, textures, and Braille labels on special paper or thermoform plastic. Tactile diagrams are essen…
- Tactile Display (Haptic Display)
- A device that presents information through the sense of touch, using raised elements, vibrations, or other tactile stimuli to convey data that would typically be presented visually. Tactile displays s…
- Tactile Dome (Truncated Dome, Detectable Warning Surface)
- Small raised bumps arranged in a grid pattern on ground surfaces to provide a tactile warning of an upcoming hazard, such as a curb edge, train platform edge, or street crossing. Tactile domes are par…
- Tactile Dowsing
- An interaction technique that uses vibrotactile feedback to guide a user toward a target direction in space without visual cues. The term draws an analogy to water dowsing, where a divining rod suppos…