Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 298 of 333
- Threat Modeling (Security Threat Modeling, STRIDE)
- A structured engineering practice for identifying, categorising, and mitigating security and privacy threats in a system before they are exploited. The widely used STRIDE framework (Microsoft) covers …
- Throughput (Throughput (Fitts), Pointing Throughput)
- In human-computer interaction, throughput is a combined speed-accuracy metric derived from Fitts's law that measures the efficiency of aimed pointing movements, expressed in bits per second (bps). It …
- Tiered Mentoring (Near-Peer Mentoring, Cascade Mentoring)
- A mentoring structure in which learners at several stages of development work together, so that each participant has a role model who is only one step ahead of them rather than many. In a tiered model…
- Tiger Embosser (ViewPlus Tiger, Tiger Braille Printer)
- A brand of Braille embosser manufactured by ViewPlus Technologies that produces both Braille text and tactile graphics by pressing raised dots onto thick paper. Unlike traditional Braille embossers th…
- Tile-Based Interface (Tile-Based Interaction)
- An interaction paradigm that represents spatial content as a grid of discrete, navigable tiles rather than a continuous coordinate plane. In accessible design contexts, tile-based interfaces provide b…
- Timbre (Tone Colour, Tone Color)
- The perceived quality or 'colour' of a sound that distinguishes different sources playing the same pitch and loudness — for instance, the difference between a flute, a violin, and a human voice singin…
- Time Agnosia (Time Blindness)
- Difficulty accurately perceiving the passage of time, common in ADHD and often manifesting as losing track of hours while scrolling, underestimating how long tasks take, or chronic lateness. The ADHD …
- Time Blindness (Diminished time awareness)
- A reduced or unreliable awareness of the passage of time, commonly associated with ADHD and related executive-function differences. People experiencing time blindness may struggle to estimate how long…
- Time Diary (Time Use Diary, Activity Diary)
- A research methodology in which participants record their activities, experiences, or events in real time or near-real time as they occur, rather than recalling them retrospectively. In accessibility …
- Time Management
- The ability to plan and control how time is allocated to specific activities. In the context of accessibility and assistive technology, time management support helps individuals with cognitive impairm…
- Time-Based Media (Multimedia Content, Synchronized Media)
- Content that unfolds over time, including audio, video, audio-video combinations, and interactive multimedia presentations. WCAG Guideline 1.2 requires that time-based media be made accessible through…
- Time-Causal Model (Temporal Causal Model, Sequential Logic Model)
- A computational model that enforces temporal coherence in predictions by ensuring that the sequence of recognized events follows a logical causal order. In recipe tracking, a time-causal model prevent…
- Time-Lapse Photography
- A photographic technique that captures a series of still images at set intervals over a period of time. In accessibility contexts, time-lapse photography has been explored as an alternative to video c…
- Time-compressed Speech (Accelerated Speech, Speed-altered Speech)
- Speech that has been digitally processed to play at a faster rate than it was originally recorded or synthesized, while preserving pitch. Unlike simply increasing playback speed (which raises pitch), …
- Time-of-Flight Camera (TOF Camera, ToF Sensor, Depth Camera)
- A type of camera sensor that measures the distance to objects by calculating the time it takes for emitted light (typically infrared) to travel to a surface and reflect back. Time-of-Flight cameras pr…
- Timed Text (Timed Text Markup Language, TTML, DFXP)
- Timed Text Markup Language (TTML) is a W3C standard for representing timed text content such as captions, subtitles, and other text synchronized with audio or video media. Originally developed as the …
- Tinnitus (Ringing in the Ears)
- Tinnitus is the perception of sound - most commonly ringing, buzzing, or hissing - without a corresponding external source. It can be continuous or intermittent, uni- or bilateral, and ranges from mil…
- Tiresias (Tiresias Screenfont, Tiresias Font Family)
- A family of typefaces developed in 1998 by the Royal National Institute of Blind People (RNIB) specifically designed for legibility on screen displays, particularly television subtitling. Named after …
- Tokenism (Token Inclusion)
- The practice of including a small number of individuals from underrepresented groups primarily for the appearance of inclusivity rather than for meaningful participation or impact. In accessibility re…
- Tonal Language (Tone Language)
- A language in which pitch variations at the word or syllable level distinguish meaning, so that the same sequence of consonants and vowels can have entirely different meanings depending on the tone us…