Glossary

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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…

Word Embedding(also: Word Vector, Distributed Word Representation)

A technique in natural language processing that represents words as numerical vectors in a multi-dimensional space, where words with similar meanings are positioned closer together. Word embeddings enable computers to understand semantic relationships between words, which…

Word Error Rate(also: WER)

A standard metric for evaluating speech recognition and captioning accuracy, calculated as the number of insertions, deletions, and substitutions needed to transform the transcribed text into the reference text, divided by the total number of words in the reference. Lower WER…

Word Error Rate(also: WER)

A metric used to evaluate the accuracy of automatic speech recognition (ASR) and captioning systems, calculated as the number of word-level errors (insertions, deletions, and substitutions) divided by the total number of words in the reference transcript. Lower WER indicates…

Word Frequency(also: Lexical Frequency)

A measure of how often a word occurs in a given language or text corpus. High-frequency words like common function words are encountered regularly and recognized quickly, while low-frequency words are rarer and require more cognitive effort to process. Word frequency…

Word Lattice(also: Recognition Lattice, Speech Lattice)

A graph data structure produced by a speech recognizer that represents multiple competing word hypotheses explored during recognition, along with their acoustic and language model scores. Each path through the lattice represents a possible transcription of the spoken input. Word…

Word Prediction(also: Predictive Text, Word Completion)

A text input feature that suggests complete words based on the characters already typed, using language models to anticipate the most likely intended word. In assistive technology, word prediction is particularly valuable for single-switch users and people with motor…

Word Retrieval(also: Word Finding, Lexical Retrieval)

The cognitive process of accessing and selecting the correct word from memory to express an intended meaning during writing or speech. People with dyslexia frequently experience word retrieval difficulties, where they know the concept they want to express but cannot access the…

Word deafness(also: Pure word deafness, Auditory verbal agnosia)

A specific type of auditory agnosia in which a person can hear speech sounds but cannot comprehend spoken words, despite having normal hearing and the ability to read, write, and speak. People with word deafness describe speech as sounding like an unfamiliar foreign language or…

Word error rate(also: WER)

The standard metric for evaluating automatic speech recognition accuracy, calculated as the number of substitutions, deletions, and insertions divided by the total number of words in the reference transcript. Research with DHH users has shown that WER correlates poorly with…

Word importance(also: Lexical importance, Information content)

A measure of how critical a specific word is to the overall meaning of a sentence, typically computed using neural language models that estimate how predictable a word is from its context. In captioning evaluation, word importance helps determine the impact of ASR errors:…

Word sense disambiguation(also: WSD)

A natural language processing task that determines which meaning of a word is being used in a given context when the word has multiple possible meanings (polysemy). In accessibility applications, particularly automatic text simplification, WSD is essential for lexical…

Word-Finding Difficulty(also: Anomia, Word Retrieval Difficulty, Tip-of-the-Tongue)

A common symptom of aphasia where a person knows what they want to say but cannot retrieve the correct word. Word-finding difficulties can range from occasional pauses to severe impairment where even common words become inaccessible. The experience is often described as having a…

Word-Finding Difficulty(also: Word-Finding Deficit, Word Retrieval Difficulty)

A language impairment characterised by difficulty retrieving specific words during conversation or communication, despite the person knowing the word and its meaning. Word-finding difficulties are a hallmark symptom of aphasia and anomia but can also occur in other neurological…

WordNet

A large-scale electronic lexical database of the English language developed at Princeton University, in which nouns, verbs, adjectives, and adverbs are grouped into sets of cognitive synonyms (synsets) linked by semantic and lexical relations. WordNet is designed to model how…

Words Per Minute(also: WPM)

A standard measure of speech or reading speed, representing the number of words produced or comprehended in one minute. Typical human speech occurs at 120-180 WPM, average reading speed is 200-250 WPM, while experienced screen reader users can comprehend synthesized speech at…

Workaround(also: Hack, Alternative Strategy)

A method or technique used to bypass or overcome a limitation, barrier, or deficiency in a system, particularly when the intended functionality is inaccessible or broken. In accessibility, workarounds are strategies that disabled users develop to accomplish tasks when software…

Worker Assistance System(also: Digital Worker Assistance, Cognitive Assistance System)

Technology systems that support workers during the execution of work processes by providing interactive step-by-step instructions through text, images, videos, audio, and spatial hints. These systems are particularly valuable for workers with cognitive disabilities performing…

Workflow Accessibility(also: Accessible Workflow, End-to-End Accessibility)

The principle that every step in a multi-step process or workflow must be accessible for the entire process to be usable by people with disabilities. Workflow accessibility recognizes that a single inaccessible step in an otherwise accessible chain can create an insurmountable…

Working Memory

The cognitive system responsible for temporarily holding and manipulating information needed for complex tasks such as learning, reasoning, and comprehension. Working memory is a core executive function that is frequently impaired in ADHD, leading to difficulties with following…

Working memory(also: Short-term memory)

The cognitive system responsible for temporarily holding and manipulating information during complex tasks such as language comprehension, reasoning, and decision-making. Working memory has limited capacity, typically described as 7 plus or minus 2 items, and varies between…

Workplace Accessibility

The degree to which work environments, processes, tools, and cultures enable disabled employees to perform their jobs effectively and participate fully in workplace life. Workplace accessibility extends beyond physical access and assistive technology to include accessible…

Workplace Accommodation(also: Reasonable Accommodation, Job Accommodation)

Modifications or adjustments to a job, work environment, or work processes that enable a person with a disability to perform their job duties and participate equally in the workplace. Accommodations can include physical modifications (accessible workstations, ergonomic…

Workplace Accommodation(also: Reasonable Accommodation, Job Accommodation, Work Adjustment)

Modifications or adjustments to a job, work environment, or the way work is performed that enable a qualified person with a disability to perform essential job functions and enjoy equal employment opportunities. Workplace accommodations may include physical changes (accessible…

Workplace Inclusion(also: Inclusive Workplace)

The practice of creating work environments where all employees, including those with disabilities, can participate fully, contribute their skills, and access the same opportunities for development and advancement. Workplace inclusion goes beyond physical accessibility to…

Workplace accessibility(also: Employment accessibility, Accessible workplace)

The design of work environments, tools, processes, and practices that enable people with disabilities to participate fully and effectively in employment. Workplace accessibility encompasses physical accommodations (accessible offices, ergonomic equipment), digital accessibility…

Workplace disclosure model(also: Disclosure decision model, Joachim and Acorn framework)

A theoretical framework for understanding how individuals with invisible disabilities decide whether, when, and how to disclose their condition at work, and the outcomes that follow. The Joachim and Acorn model categorizes disclosure types by intention and timing: protective…