Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 107 of 333
- Ecology of Protections (Layered Protection Ecosystem)
- A multi-layered framework for safeguarding vulnerable users from harmful digital content by implementing protections at multiple levels of the technology stack simultaneously. For photosensitive users…
- Edge Computing (Edge AI, Edge Intelligence)
- Edge computing is a computing paradigm where data processing occurs on devices physically close to the user rather than in centralized cloud servers. For accessibility applications, edge computing off…
- Edge enhancement (Edge detection, Contour enhancement)
- An image processing technique that identifies and highlights the boundaries between objects in a visual scene, typically rendering them as bright lines against a dark background or overlaying them on …
- EdgeWrite (Edge Write)
- A gestural text entry method that uses the physical edges and corners of a square input area to guide character formation. Unlike traditional handwriting recognition that analyzes the full path of a s…
- Edinburgh Postnatal Depression Scale (EPDS)
- The Edinburgh Postnatal Depression Scale (EPDS) is a validated 10-item self-report screening questionnaire designed to identify symptoms of depression during pregnancy and in the postpartum period. Ea…
- Editorial Enunciation (Visual Enunciation)
- A semiotic concept describing how the visual layout and organisation of an interface communicates meaning beyond the content it contains. Editorial enunciation encompasses the spatial arrangement, siz…
- Educational Technology (EdTech, Learning Technology, Instructional Technology)
- The use of technological tools and resources to facilitate teaching and learning. In accessibility contexts, educational technology encompasses assistive tools designed to support students with disabi…
- Educational Video (Instructional Video, Video Lecture)
- Video content created to teach - including talking-head lectures, screencasts, animations, hand-drawn (Khan-style) explanations, recorded classroom sessions, programming/coding demonstrations, intervi…
- Edutainment (Educational Entertainment, Learning Games)
- Content or applications that combine education with entertainment, typically through games, interactive media, or engaging activities designed to teach skills while keeping users motivated and engaged…
- Egocentric (Egocentric Reference Frame, Body-Centred Reference Frame)
- A spatial reference frame in which locations and directions are defined relative to the observer's own body position and orientation. For example, "turn left," "take one step forward," or "the door is…
- Egocentric Camera (First-Person Camera, POV Camera)
- A camera that captures video from the wearer's point of view, typically mounted on the head, glasses, or chest. Egocentric video captures what the user sees or interacts with, making it valuable for a…
- Egocentric Spatial Reasoning (First-Person Spatial Understanding, User-Relative Spatial Reasoning)
- The ability of a system to understand and describe the spatial positions of objects relative to the user's body and perspective, rather than from a bird's-eye or absolute reference frame. For AI syste…
- Ehlers-Danlos Syndrome (EDS)
- A group of heritable connective tissue disorders characterized by joint hypermobility, skin hyperelasticity, and tissue fragility. EDS often leads to frequent joint dislocations, chronic pain, and dif…
- Eigenfaces
- A computer vision technique for face recognition that uses Principal Component Analysis to represent faces as a linear combination of standardized face components (eigenvectors derived from a training…
- Eight-Dot Braille (8-Dot Braille, Computer Braille)
- An extended braille system that adds two additional dots below the standard six-dot braille cell, creating a 2x4 matrix of eight dots that can represent 256 unique characters (compared to 64 in standa…
- Ekman Basic Emotions (Basic Emotions, Ekman's Six Basic Emotions)
- A taxonomy proposed by psychologist Paul Ekman that identifies six cross-culturally recognisable emotional expressions — happiness, sadness, anger, fear, disgust, and surprise — as the building blocks…
- Electrical Muscle Stimulation (EMS, Neuromuscular Electrical Stimulation, NMES)
- A technique that uses electrical impulses delivered through surface electrodes to elicit muscle contractions. EMS is used therapeutically for muscle re-education, spasticity management, and rehabilita…
- Electrodermal Activity (EDA, Galvanic Skin Response, GSR)
- The variation of electrical conductance in the skin caused by sweat gland activity, which is controlled by the sympathetic nervous system. EDA is used as a physiological measure of emotional arousal a…
- Electroencephalography (EEG)
- A non-invasive method of recording electrical activity of the brain using electrodes placed on the scalp. In assistive technology, EEG is the primary sensing technology behind brain-computer interface…
- Electroencephalography (EEG)
- A non-invasive method of recording electrical activity in the brain using electrodes placed on the scalp. EEG is fundamental to most consumer and research brain-computer interfaces because it is relat…