Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 168 of 333
- Last-few-meters Wayfinding (Last-meter wayfinding, Last-few-meters problem)
- The final segment of an indoor or outdoor journey, from the nearest routable point (a building lobby, a doorway, a kerbside pin on a map) to the exact end destination (a specific room, counter, or sea…
- Late Blind (Adventitiously Blind, Acquired Blindness)
- A person who lost their vision later in life, typically after age 5-7 when visual memories and concepts have been established. Late blind individuals often retain visual memories and may use these to …
- Late Deafened (Adventitiously Deaf, Acquired Deafness)
- Late deafened refers to individuals who became deaf after developing spoken language, typically in adolescence or adulthood. Unlike people who are born deaf or become deaf in early childhood, late-dea…
- Late Diagnosis (Adult Diagnosis, Delayed Diagnosis)
- Receiving a formal diagnosis of a condition significantly later than when symptoms first appeared, often in adulthood for conditions typically identified in childhood. Late diagnosis of ADHD and autis…
- Late binding
- A software engineering concept where decisions about how components connect are deferred until runtime rather than being fixed at design time or compile time. In user interface design, late binding re…
- Late-Life Disability (Age-Related Disability, Acquired Age-Related Disability)
- Disability that develops gradually as a person ages, including changes in vision, hearing, motor control, and cognition. Unlike disabilities present from birth or acquired through injury, late-life di…
- Latency (Delay, Lag, Response Time)
- The time delay between when an event occurs and when its accessible representation is delivered to the user. In real-time captioning, latency is the gap between spoken words and their appearance as te…
- Latent Semantic Analysis (LSA, Latent Semantic Indexing, LSI)
- A natural language processing technique that uses mathematical methods (Singular Value Decomposition) to identify patterns in relationships between words and concepts within a large corpus of text. In…
- Laterality (Left-Right Discrimination, Lateral Awareness)
- Laterality is the ability to distinguish between left and right sides of the body and to apply this understanding to the surrounding environment for spatial orientation and navigation. Laterality is a…
- Latin Square Design (Latin Square Counterbalancing)
- A counterbalancing method used in experimental research to control for order and sequence effects when each participant experiences multiple conditions. In a Latin Square arrangement, conditions are o…
- Layer-wise Relevance Propagation (LRP)
- Layer-wise Relevance Propagation (LRP) is an explainable AI technique that attributes a neural network's prediction back to its input features by propagating relevance scores layer by layer from the o…
- Layout Customization (Visual Layout Control)
- The ability to modify the spatial arrangement and visibility of visual elements within a video or interface. In video accessibility for ADHD, layout customization allows viewers to choose which visual…
- Layout Table (Presentational Table)
- An HTML table element used to control the visual positioning of content on a web page rather than to present tabular data. Layout tables were a common web design technique before CSS became widely sup…
- Leadership of the Most Affected
- A core principle of disability-justice organising that positions people most directly affected by a problem — those with the most at stake and the most lived expertise — as the leaders of work aimed a…
- Leap Motion (Leap Motion Controller)
- A compact infrared hand-tracking sensor that uses binocular cameras to detect and track finger and hand positions in three-dimensional space without physical contact. In accessibility research, Leap M…
- Leapfrog Technology (Leapfrogging)
- The adoption of advanced or cutting-edge technology in contexts that skipped intermediate technological stages, bypassing legacy infrastructure to achieve modern capabilities directly. In assistive te…
- Learnability
- A usability attribute measuring how easy it is for users to accomplish basic tasks the first time they encounter a design. High learnability means new users can quickly become productive with a system…
- Learned Helplessness
- A psychological condition in which a person comes to believe they are unable to perform tasks or control outcomes, often resulting from prolonged over-assistance or lack of opportunity to attempt task…
- Learning Design (IMS Learning Design, IMS LD)
- A specification from IMS Global Learning Consortium (based on the Educational Modeling Language) that provides a framework for describing the structure and sequence of learning activities, roles, and …
- Learning Disability (Specific Learning Disability, Learning Disorder)
- A neurological condition that affects the brain's ability to receive, process, store, respond to, or communicate information. Learning disabilities include dyslexia (reading), dyscalculia (mathematics…