Glossary

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GenderMag(also: Gender-Inclusiveness Magnifier, GenderMag Method)

GenderMag (Gender-Inclusiveness Magnifier) is an inclusive design inspection method for finding and fixing inclusivity bugs in problem-solving software. It uses five facets of problem-solving style that show statistically significant gender differences: Motivations…

General Data Protection Regulation(also: GDPR)

A European Union regulation (2016/679) that governs the collection, processing, and storage of personal data for individuals within the EU and EEA. GDPR requires that consent for data processing be freely given, specific, informed, and unambiguous—which has significant…

Generalization(also: Skill Generalization, Transfer of Learning)

The ability to apply a skill or concept learned in one setting, with one set of materials, or with one person, to new settings, materials, or people. Generalization is a major focus in autism education and therapy because autistic individuals may learn a skill in a specific…

Generalized Anxiety Disorder(also: GAD)

A mental-health condition characterized by persistent, excessive, and often uncontrollable worry about a range of everyday situations, accompanied by physical and cognitive symptoms such as restlessness, fatigue, difficulty concentrating, muscle tension, and sleep disturbance.…

Generative AI(also: GenAI, Generative Artificial Intelligence)

Artificial intelligence systems that can create new content — including text, images, audio, video, and code — based on patterns learned from training data. Generative AI tools like ChatGPT, DALL-E, Midjourney, and Stable Diffusion have significant implications for…

Generative Adversarial Network(also: GAN, Adversarial Network)

A type of deep learning architecture consisting of two neural networks — a generator and a discriminator — that are trained in competition with each other. The generator creates synthetic data (such as images) while the discriminator tries to distinguish between real and…

Generative Thinking(also: Generative Cognition, Creative Problem Solving)

Generative thinking is the cognitive ability to spontaneously produce novel ideas, solutions, or approaches to problems without external prompting. In the context of autism and cognitive accessibility, generative thinking is significant because it is often considered impaired in…

Genre Alignment

In captioning, the practice of adapting caption style, vocabulary, and tone to match the genre of the media content being captioned. For example, horror content may benefit from captions that emphasize tension and dread, while comedy content may use lighter, more playful…

Genu Recurvatum(also: Knee hyperextension)

Backward bending of the knee beyond its normal straight position during standing or stance phase of gait. Genu recurvatum is often caused by hamstring weakness, quadriceps spasticity, or proprioceptive deficits following stroke, cerebral palsy, or spinal cord injury. Repeated…

Geo-referenced Data(also: Geospatial Data, Geographic Data, Georeferenced Data)

Data that is associated with specific geographic locations or regions, such as population statistics by county, crime rates by neighbourhood, or election results by district. Geo-referenced data is typically presented on maps using visual encodings like colour gradients, which…

Geocoding(also: Geo-coding, Geographic Coding)

The process of associating geographic coordinates (latitude and longitude) or location identifiers with objects, markers, or data points. In accessibility contexts, geocoding is used to tag physical locations with digital information that assistive technologies can use — for…

Geofencing(also: Geo-Fencing, Virtual Boundary)

Geofencing is a technology that creates virtual geographic boundaries using GPS, RFID, or other location-based data to trigger actions when a device enters or exits a defined area. In accessibility contexts, geofencing can be used to designate low-speed zones for micromobility…

Geographic Information System(also: GIS)

A system for capturing, storing, analyzing, and displaying geographically referenced spatial data. In accessibility, GIS technology underpins navigation and wayfinding tools for blind and visually impaired users by providing detailed environmental databases that can be queried…

Geovisualization(also: Geospatial visualization, Geographic visualization)

The use of interactive visual representations — choropleth maps, dot density maps, heat maps, flow maps, and related forms — to make geographic patterns, trends, and spatial relationships visible and explorable. Geovisualizations combine cartographic traditions with…

German Sign Language(also: DGS, Deutsche Gebärdensprache)

The sign language used by the deaf community in Germany, recognised as an independent natural language with its own grammar, syntax, and vocabulary distinct from spoken German. Like other sign languages worldwide, German Sign Language is a visual-spatial language that uses…

Germane Cognitive Load(also: Germane Load)

One of three types of cognitive load identified by cognitive load theory, referring to the mental effort devoted to processing, constructing, and automating knowledge schemas — the productive cognitive work that leads to actual learning. Unlike extraneous load (which is…

Gerontechnology(also: Gerontech)

An interdisciplinary field combining gerontology (the study of aging) and technology to design products, services, and environments that support the health, independence, and quality of life of older adults. Gerontechnology addresses the specific needs and abilities of aging…

Gestalt Grouping Principles(also: Gestalt Principles, Gestalt Laws of Perceptual Organization)

A set of principles from perceptual psychology that describe how the human visual system organizes individual elements into coherent groups and patterns. Key principles include spatial proximity (elements near each other are perceived as related), connectedness (elements joined…

Gestural Input(also: Gesture-based Input, Touch Gestures)

Input methods that interpret finger movements on a touchscreen as commands, including taps, swipes, pinches, and multi-finger gestures. For blind users, gestural input must be performed without visual feedback, requiring consistent gesture recognition regardless of screen…

Gestural Interaction(also: Gesture-Based Interaction)

A mode of human-computer interaction in which users control systems through movements of the body — hands, arms, head, eyes, or whole body — captured by sensors such as accelerometers, cameras, IMUs, or depth sensors. Gestural interaction supports hands-free or low-force control…

Gestural Interface(also: Gesture-Based Interface, Gestural Controller)

An input device or system that interprets body movements, hand gestures, or physical expressions as control signals for digital systems. In accessibility and music contexts, gestural interfaces are particularly relevant for d/Deaf and Hard of Hearing users who communicate…

Gesture Elicitation(also: User-Defined Gestures)

Gesture elicitation is a participatory design method where end users are asked to invent gestures for a set of device functions, rather than having gestures predetermined by designers or engineers. Participants are shown the effect of an action (such as zooming in) and asked to…

Gesture Elicitation Study(also: Gesture Elicitation, User-Defined Gestures)

A research methodology in which participants are presented with the effects or outcomes of actions (called referents) and asked to propose gestures they would naturally perform to trigger those effects. This approach captures user preferences and expectations rather than…

Gesture Input(also: Gestural Input, Gesture-Based Input)

A form of human-computer interaction where users perform physical movements—such as swipes, taps, pinches, or mid-air hand motions—to issue commands or provide input to a digital device. Gesture input is fundamental to touchscreen smartphones, tablets, and increasingly to…

Gesture Input(also: Gesture Recognition, Gesture-Based Interaction)

An input method that uses physical movements of the body — typically hands, fingers, arms, or head — to interact with digital systems. Gesture input includes touchscreen gestures (swipes, taps, pinches), mid-air gestures detected by cameras or motion sensors, and motion gestures…

Gesture Interaction(also: Gesture-based interaction, Gestural interfaces)

An input modality in which users control digital systems through hand, arm, or body movements detected by cameras, depth sensors, IMUs, or wearable devices rather than through traditional keyboards, pointing devices, or touchscreens. Gesture interaction underpins many augmented…

Gesture Recognition(also: Gesture Detection)

The computational process of identifying and interpreting human gestures—typically hand, arm, or body movements—using sensors and machine learning algorithms. Gesture recognition systems analyze data from cameras, accelerometers, gyroscopes, or other sensors to classify…

Gesture Recognition Threshold(also: Activation Threshold, Gesture Detection Threshold)

The predefined parameters that a gesture recognition system uses to determine whether a user's hand movement constitutes a valid gesture input. These thresholds specify requirements such as the exact finger positions, distances between fingertips, hand openness levels, and…

Gesture Set Design(also: Gesture Vocabulary Design)

The process of selecting and defining a collection of gestures that users will perform to interact with a system, including decisions about which physical movements map to which functions. Effective gesture set design considers factors such as learnability, memorability,…

Gesture Typing(also: Swipe Typing, Trace Typing, Glide Typing)

A text entry method on touchscreen devices where the user enters a word by continuously gliding their finger from letter to letter on a virtual keyboard without lifting it, rather than tapping each key individually. The continuous trace is interpreted by a statistical decoder…

Gesture sonification(also: Touch sonification, Gesture-to-sound mapping)

The technique of converting touchscreen finger movements into real-time audio representations by mapping spatial position to sound parameters — typically pitch for vertical position and stereo panning for horizontal position. Gesture sonification enables blind and visually…

Gesture vocabulary(also: Gesture set, Interaction gesture repertoire)

The complete set of touch gestures recognized and used by a device or application, including single-stroke gestures (swipes, flicks), multistroke gestures (multi-tap, draw-then-tap), and multitouch gestures (pinch, rotate, two-finger swipe). As touchscreen interfaces evolve,…

Gesture-Based Input(also: Gesture input, Gestural input, Gesture-based text entry)

An input method that interprets finger or hand movements — such as swipes, taps, and drawn paths — as commands or text characters. For people with visual impairments, gesture-based input on touchscreens offers an alternative to traditional keyboard layouts that require targeting…

Gesture-Based Interaction(also: Gesture Control, Gestural Input)

A mode of human-computer interaction where users control digital systems through hand or body movements detected by cameras or sensors, rather than through traditional input devices. In mixed reality headsets like the HoloLens 2, gesture-based interactions include touching,…

Gesture-Based Interface(also: Gestural Interface, Gesture Recognition Interface)

An interaction system that interprets human gestures—such as hand movements, body poses, or finger motions—as input commands. Gesture-based interfaces can use cameras, accelerometers, touch surfaces, or wearable sensors to detect and interpret movement. In accessibility, they…

Gesture-based interaction(also: Gestural interface, Touchless interaction)

An interaction modality where users control technology through body movements, hand gestures, or postures detected by sensors such as depth cameras, rather than through traditional input devices like keyboards, mice, or touchscreens. Gesture-based interaction can benefit people…

Ghost Cursor(also: Phantom Cursor, Proxy Cursor)

A visual indicator displayed on screen that shows a potential cursor position, used in speech-based and alternative cursor movement systems. Multiple ghost cursors can be displayed simultaneously, typically aligned in a row or column, allowing users to quickly specify an…

Gig Economy(also: Platform Economy, On-Demand Economy)

An economic model characterized by short-term, flexible, and freelance work arrangements facilitated through digital platforms, rather than traditional permanent employment. For people with disabilities, the gig economy presents both opportunities and challenges: it can provide…

Gist Summary(also: Gist, Page Gist, Web Page Summary)

A gist summary is a brief, automatically or manually generated overview of a document or web page that captures its central theme or focus, enabling a reader to quickly assess the content's relevance without reading the entire text. In accessibility contexts, gist summaries are…

Git Diff(also: Code Diff, Diff View)

A comparison view that shows the differences between two versions of a file or set of files in a version control system. Git diff displays additions, deletions, and modifications using visual markers such as color coding (green for additions, red for deletions) and plus/minus…

GitHub Copilot(also: Copilot)

An AI code assistant developed by GitHub and Microsoft, integrated into editors such as Visual Studio Code, Visual Studio, and JetBrains IDEs. Copilot offers inline code completion, conversational chat (Ask, Edit, and Agent modes), and an Accessible View designed to present…

Glanceability(also: Glanceable, At-a-Glance Access)

Glanceability refers to the ability of a user to quickly extract key information from a document, interface, or data display with minimal effort. In the context of accessibility, glanceability describes how readily a screen reader user can skim and navigate through content using…

Glare(also: Visual Glare)

Excessive brightness or reflections from surfaces or light sources that cause visual discomfort, reduce visibility, or impair the ability to see clearly. Glare is a significant accessibility barrier for people with low vision and light sensitivity. In musical performance…

Glare Sensitivity(also: Photophobia, Light Sensitivity)

An increased sensitivity to light that causes discomfort, visual difficulty, or pain, commonly experienced by people with various eye conditions including cataracts, macular degeneration, and albinism. Glare sensitivity significantly affects the usability of digital displays and…

Glasgow Coma Scale(also: GCS)

A standardized neurological assessment scale used to evaluate the severity of brain injuries by measuring three aspects of responsiveness: eye opening (1-4 points), verbal response (1-5 points), and motor response (1-6 points), yielding a total score from 3 to 15. A GCS score of…

Glaucoma

A group of eye diseases that damage the optic nerve, usually caused by abnormally high intraocular pressure. It is one of the leading causes of irreversible blindness worldwide, affecting over 80 million people. Glaucoma typically causes gradual peripheral vision loss that may…

Glaucoma

A group of eye conditions that damage the optic nerve, typically associated with elevated intraocular pressure. Glaucoma is a leading cause of irreversible blindness worldwide. It usually causes gradual loss of peripheral vision first, which can progress to tunnel vision and…

Global Accessibility Awareness Day(also: GAAD)

An annual event held on the third Thursday of May to focus attention on digital access and inclusion for the more than one billion people with disabilities worldwide. Founded in 2011, GAAD is observed through events, talks, workshops, panels, and accessibility-focused…

Global Navigation(also: Macro navigation, Route-scale navigation)

Navigation at the scale of routes and buildings — delivering a user from a starting point to a general destination area (a room, a platform, an exit). In blind-navigation research, global-navigation systems are typically turn-by-turn, localised via GPS, BLE beacons, Wi-Fi RSS,…

Global North(also: Developed Countries, First World)

A socioeconomic and political designation referring to countries that are typically wealthier, more economically developed, and generally located in the northern hemisphere — plus Australia and New Zealand. In accessibility research, the Global North dominates published…