Glossary

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Wernicke's Aphasia(also: Fluent Aphasia, Receptive Aphasia, Sensory Aphasia)

A type of aphasia caused by damage to Wernicke's area in the left temporal lobe of the brain. People with Wernicke's aphasia can produce fluent speech with normal rhythm and grammar, but their words often don't make sense—they may use incorrect words, made-up words (neologisms),…

Western Aphasia Battery(also: WAB, WAB-R, Western Aphasia Battery-Revised)

A standardized assessment tool used to evaluate language function in adults with acquired neurological disorders, particularly aphasia following stroke or brain injury. The WAB measures spontaneous speech, auditory verbal comprehension, repetition, and naming to classify aphasia…

Wheelchair(also: Manual Wheelchair, Power Wheelchair, Wheeled Mobility Device)

A mobility assistive device consisting of a chair mounted on wheels, used by people who have difficulty walking or cannot walk due to illness, injury, or disability. Wheelchairs range from basic manual models to powered chairs with advanced controls, and are recognized by the…

Wheelchair Accessibility(also: Wheelchair Access, Wheeled Mobility Access)

The degree to which physical environments, facilities, and services can be used by people who use wheelchairs. Wheelchair accessibility encompasses a wide range of factors including doorway widths, ramp availability and slope, floor surfaces, turning radius clearances, table and…

Wheelchair Assessment(also: Wheelchair Evaluation, Seating Assessment)

A structured clinical process conducted by trained rehabilitation professionals to determine the most appropriate wheelchair and seating system for an individual. The assessment typically involves multiple stages: a background interview covering medical history, lifestyle, and…

Wheelchair Basketball

An adaptive version of basketball played by athletes using sport-specific wheelchairs. The game follows similar rules to standing basketball with modifications for wheelchair use, including a classification system that assigns point values to players based on their functional…

Wheelchair Provision(also: Wheelchair Service Delivery, Wheelchair Service)

The comprehensive process of ensuring that individuals who need wheelchairs receive appropriate products along with the related services necessary for safe and effective use. As defined by the World Health Organization, wheelchair provision encompasses assessment, fitting,…

Wheelchair Rugby(also: Murderball, Quad Rugby)

A competitive adaptive sport for athletes with impairments affecting all four limbs, originally designed for athletes with quadriplegia. Played on an indoor court, it combines elements of rugby, basketball, and handball. The sport is known for its physicality, with…

Wheelchair Seating(also: Wheelchair Positioning)

The configuration and customization of a wheelchair's seating components to provide appropriate support, comfort, and functional positioning for the user. Proper wheelchair seating considers trunk support, head positioning, pelvic alignment, and pressure distribution. For users…

Wheelchair Service Provision(also: Wheelchair Service Delivery)

The systematic process of assessing, fitting, providing, and following up on wheelchair users to ensure they receive appropriate mobility devices matched to their individual needs, environment, and lifestyle. The WHO has established guidelines and training packages for…

Wheelchair Service Steps(also: Wheelchair Service Delivery Process)

The structured sequence of activities involved in providing appropriate wheelchair services to individuals with mobility impairments. These steps typically include assessment (evaluating the user's physical needs, environment, and lifestyle), procurement (sourcing appropriate…

Wheelchair Sports

Athletic activities played by athletes who use wheelchairs, either due to mobility impairments or as part of the sport's rules. Common wheelchair sports include basketball, rugby, tennis, racing, and fencing. Competitive wheelchairs are highly customized for each athlete based…

Wheelchair User

A person who uses a manual or powered wheelchair as their primary means of mobility. In VR accessibility research, wheelchair users face specific challenges including: controllers that require both hands (preventing simultaneous wheelchair operation), HMD cables that can catch…

Wheelchair-Accessible Taxi(also: WAT, Wheelchair Taxi, Accessible Taxi)

A taxi or on-demand vehicle fitted with a ramp or lift and interior tie-down points that allow a passenger to travel while seated in their wheelchair. Wheelchair-accessible taxis are a core component of paratransit in many cities, dispatched either through general-purpose taxi…

Whisper(also: OpenAI Whisper, Whisper ASR)

An open-source automatic speech recognition (ASR) model released by OpenAI in 2022, trained on 680,000 hours of multilingual and multitask supervised audio data. Whisper supports transcription in dozens of languages, translation into English, language identification, and…

Whispered Speech(also: Whisper, Whispering)

A mode of speech production in which the vocal folds do not vibrate periodically; sound is generated by turbulent airflow through a narrow glottal opening. Whispered speech lacks a fundamental frequency and carries lower acoustic energy, which makes it harder for humans and for…

White Cane(also: Long Cane, Mobility Cane, Blind Cane)

A lightweight, typically white or white-with-red-tip cane used by blind and visually impaired individuals as a mobility aid for detecting obstacles, changes in terrain, and environmental features while walking. The white cane serves dual purposes: as a practical tool for probing…

White Glove Service

A hospitality concept denoting personalized, detail-oriented service characterized by five qualities: anticipatory assistance (acting before being asked), discretion and privacy, attention to detail, personalization, and seamless problem resolution. In accessibility and…

White Noise(also: Broadband Noise)

A sound signal containing equal intensity across all audible frequencies, perceived as a constant hissing or static sound. In accessibility applications, white noise is valued for its localization properties—the broadband frequency content makes it easier for listeners to…

Whole-Self(also: Whole Self)

A concept from disability justice that frames a disabled person's identity, needs, and preferences as a rich, multidimensional whole — cultural background, lived experiences, interests, relationships, and aspirations — rather than being reduced to their disability or impairment.…

Wholeness

Wholeness is a core principle of the 10 Principles of Disability Justice articulated by Sins Invalid: the recognition that 'each person is full of history and life experience' and has inherent worth outside capitalist notions of productivity. It challenges medical-model framings…

Wi-Fi Fingerprinting(also: WiFi Fingerprinting, Wi-Fi Positioning)

An indoor localization technique that estimates a device's position by comparing the signal strengths of nearby Wi-Fi access points against a pre-collected database of "fingerprints" — measurements taken at known reference points across a building. Because Wi-Fi access points…

Wicked Problem

A problem that is difficult or impossible to solve because of incomplete, contradictory, and changing requirements that are often difficult to recognize. Wicked problems resist traditional problem-solving approaches because effects cannot be isolated, outcomes are unpredictable,…

Wide-Range Achievement Test(also: WRAT, WRAT-5, WRAT sentence comprehension)

A standardised achievement test used to measure basic academic skills, including word reading, sentence comprehension, spelling, and math computation. In accessibility research, the WRAT sentence-comprehension sub-test has been validated as a measure of English literacy for Deaf…

Wideband Audio(also: HD Voice, High-Definition Audio)

Audio transmission that captures a broader range of frequencies (typically 50-7000 Hz or higher) compared to narrowband telephony (300-3400 Hz), resulting in clearer and more natural-sounding speech. In accessibility contexts, wideband audio is particularly important for hearing…

Widget(also: UI Widget, Web Widget, Interactive Component)

A discrete user interface object that users can interact with, such as a dropdown menu, slider, tab panel, date picker, modal dialog, or autocomplete field. The W3C defines a widget as a "discrete user interface object with which the user can interact." In web accessibility,…

Widget Role(also: ARIA Role, Component Role)

A property that identifies the type and purpose of a user interface element to assistive technologies. Widget roles communicate what a component is (such as a button, checkbox, slider, or tab) so that screen readers and other assistive tools can announce the element correctly…

Widget accessibility(also: ARIA widget roles, Custom control accessibility)

The practice of ensuring that interactive user interface components — such as drop-down menus, tab panels, accordions, modal dialogs, and sliders — are operable and perceivable by users of assistive technologies. Widget accessibility requires correct implementation of WAI-ARIA…

Widgit Symbols(also: Widgit Rebus, Widgit Literacy Symbols)

A commercial symbol set used in augmentative and alternative communication (AAC) and literacy support, developed by Widgit Software in the UK. Widgit Symbols are designed with consistent schematic representations that build on a core vocabulary, making them particularly suitable…

Wilcoxon Signed-Rank Test(also: Wilcoxon Test)

The Wilcoxon signed-rank test is a non-parametric alternative to the paired t-test, used to compare two related samples when the data are ordinal or not normally distributed. It ranks the absolute differences between paired observations and tests whether the sum of positive and…

Williams Syndrome(also: Williams-Beuren Syndrome, WBS)

A rare genetic condition caused by the deletion of approximately 26 genes on chromosome 7, characterized by cardiovascular problems, distinctive facial features, and a unique cognitive profile that typically includes intellectual disability alongside strong verbal and social…

Window Shopping(also: Recreational window-shopping, Browsing)

The casual practice of looking at shops, displays, or goods without a specific purchase in mind — social activity valued for its own sake as much as for any eventual transaction. Accessibility research frames window-shopping as a form of non-instrumental exploration that is…

Window-Eyes

A commercial screen reader for Microsoft Windows developed by GW Micro that was one of the leading assistive technologies for blind computer users from the 1990s through the 2010s. Window-Eyes provided speech and braille output for navigating the Windows operating system and…

Windowless Mode(also: Flash wmode transparent, wmode=transparent)

Windowless mode is a legacy Adobe Flash rendering option (wmode=transparent or wmode=opaque) in which the Flash player drew into the browser's graphics surface directly rather than into its own dedicated OS window. It was commonly used so that HTML content could overlap Flash…

Wireframe(also: Wireframing, UI Mockup, Page Schematic)

A visual guide representing the skeletal framework of a website or application, showing page layout, content placement, and navigation structure before detailed design begins. Wireframes are fundamental to web development planning and information architecture. However,…

Wireless Sensor Network(also: WSN, Sensor Network)

A distributed network of small, autonomous sensor devices that monitor physical or environmental conditions and wirelessly transmit data to a central system for processing. In assistive technology applications, wireless sensor networks can detect events such as movement,…

Within-Subject Design(also: Within-Subjects Design, Repeated Measures Design)

An experimental research design where each participant is exposed to all conditions being compared, rather than assigning different participants to different conditions. In accessibility user studies, within-subject designs are common because they require fewer participants — an…

Within-Subjects Design(also: Repeated Measures Design, Crossover Design)

A research methodology in which the same participants are exposed to all conditions or treatments being compared, with each participant serving as their own control. In accessibility research, within-subjects designs are valuable for comparing assistive technologies or interface…

Within-Subjects Study(also: Within-subject study, Repeated-measures design)

An experimental design in which every participant experiences every condition being compared, so each person acts as their own control. Within-subjects studies increase statistical power with smaller samples and remove between-person variance, but must counterbalance order (e.g.…

Wizard Design Pattern(also: Wizard Interface, Step-by-step Interface, Guided Task Flow)

An interface design pattern that breaks complex tasks into a series of simple, sequential questions or steps. Rather than presenting all options simultaneously, a wizard guides users through one decision at a time, reducing cognitive load and the need for prior system knowledge.…

Wizard of Oz(also: WOz, Wizard of Oz Study, Wizard of Oz Method)

A research and prototyping technique in which a human operator (the "wizard") secretly performs functions that participants believe are being handled by the system. This allows researchers to study user reactions to capabilities that have not yet been fully implemented. In…

Wizard of Oz(also: WoZ, Wizard of Oz Testing, Wizard of Oz Prototyping)

A research and design method in which a human operator (the "wizard") secretly controls or simulates system responses that participants believe are automated. In accessibility research, Wizard of Oz studies allow researchers to test interaction concepts for assistive…

Wizard of Oz Study(also: WOZ Study, Wizard of Oz Method)

A research method in which participants interact with what they believe is an automated system, but which is actually operated in whole or in part by a human "wizard" hidden from view. The method is used to evaluate the usability and desirability of interfaces that do not yet…

Wizard-of-Oz(also: WOZ, Wizard of Oz Method, WOZ Study)

A research methodology where participants interact with what they believe is an autonomous system, but a human "wizard" is secretly operating it behind the scenes. Named after the 1939 film, this technique is commonly used in accessibility and HCI research to test interface…

Wizard-of-Oz Prototype(also: WOz Prototype, WOz Method, Wizard of Oz Study)

A research and design method where a human operator secretly simulates the behaviour of an interactive system that has not yet been built, allowing participants to experience and evaluate the concept as if the technology were fully functional. Widely used in accessibility and…

Wizard-of-Oz Study(also: WoZ Study, Wizard of Oz Protocol)

A research method in which participants interact with a system they believe is autonomous, but which is actually being partially or fully operated by a human researcher (the "wizard") behind the scenes. In accessibility research, Wizard-of-Oz studies are used to test the…

Wizard-of-Oz Study(also: Wizard of Oz, WoZ Study, Wizard-of-Oz Method)

A Wizard-of-Oz study is a research method in human-computer interaction where participants interact with a system they believe is autonomous, but which is actually being partially or fully operated by a human researcher (the "wizard") behind the scenes. This technique is…

Wizard-of-Oz Study(also: WOz Study, Wizard of Oz Method, WOz Technique)

A research methodology in human-computer interaction where participants believe they are interacting with an autonomous system, but a hidden human operator (the "wizard") is actually controlling some or all of the system's responses. This technique allows researchers to evaluate…

Wizard-of-Oz study(also: WoZ study, Wizard of Oz method)

A research methodology in which participants interact with a system they believe is automated, but which is actually operated partially or fully by a hidden human operator (the "wizard"). This approach allows researchers to evaluate user experience, interface design, and…

Word Board(also: Communication Board, Word Display)

A communication tool used in augmentative and alternative communication (AAC) consisting of words, common phrases, and sometimes alphabet letters arranged on a physical board or digital display. Users compose messages by pointing to items on the board. Words are typically…