Glossary

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Constraint-Induced Movement Therapy(also: CIMT, CI Therapy, Constraint-Induced Therapy)

A rehabilitation technique for individuals with hemiparesis (weakness on one side of the body), typically following stroke. The therapy involves constraining the stronger, unaffected limb—traditionally by placing it in a sling or mitt—while intensively training the weaker,…

Constructionism(also: Constructionist Learning)

A learning theory developed by Seymour Papert proposing that people learn most effectively when actively constructing artifacts that are personally meaningful. In accessibility and therapeutic contexts, constructionism informs the design of technologies that give users…

Constructive Exploration

Constructive exploration is an interactive learning method in which a user is guided by a computer system to physically build a representation of spatial information using building blocks or other tangible objects, rather than passively receiving descriptions or studying…

Constructive Solid Geometry(also: CSG)

A technique in 3-D modeling that creates complex shapes by combining simpler geometric primitives (cubes, spheres, cylinders) using boolean operations such as union, difference, and intersection. CSG is the foundational approach used by code-based modeling tools like OpenSCAD.…

Constructivism(also: Constructivist Learning Theory)

An educational theory that holds that learners actively construct their own understanding and knowledge through experience, exploration, and reflection rather than passively receiving information. In accessibility and assistive technology contexts, constructivism informs the…

Constructivist Grounded Theory(also: CGT)

A qualitative research methodology developed by Kathy Charmaz that adapts classic grounded theory by acknowledging that the researcher's theoretical commitments and lived experience shape the categories that emerge from the data. Rather than claiming a neutral "view from…

Consumer-Grade 3D Printing(also: Desktop 3D Printing)

Affordable 3D printing technology designed for personal or small-scale use, typically using fused deposition modeling with thermoplastic filaments. While consumer-grade printers have democratized fabrication and enabled DIY assistive technology programs, they have limitations in…

Contamination OCD(also: Contamination Obsessions)

A subtype of OCD characterized by obsessive fears of contamination from dirt, germs, bodily fluids, chemicals, or other perceived pollutants, accompanied by compulsive behaviors like excessive hand washing, cleaning, avoidance of "contaminated" surfaces, and seeking reassurance…

Contemporary Dance Accessibility(also: Inclusive Dance, Accessible Dance)

The practice of making contemporary dance learning, teaching, and performance accessible to people with disabilities, particularly those who are blind or have low vision. Unlike structured dance forms that follow fixed sequences, contemporary dance emphasises movement qualities…

Content Adaptation(also: Content Transformation, Web Adaptation)

The process of modifying web content to make it more accessible or usable in different contexts, including for users with disabilities, users of assistive technologies, or users on constrained devices like mobile phones. Content adaptation encompasses techniques such as…

Content Analysis

A systematic research methodology used to analyze and categorize communication artifacts such as text, video, images, or audio recordings. In accessibility research, content analysis is frequently applied to study how people with disabilities interact with technology or perform…

Content Author(also: Content Editor, Content Creator, Web Author)

A person who creates, edits, and publishes content on a website or digital platform, typically using a content management system rather than writing code directly. Content authors are responsible for many accessibility-critical decisions including writing alternative text for…

Content Creation Accessibility(also: Accessible Content Creation, Creator Accessibility)

The design and provision of tools, platforms, and workflows that enable people with disabilities to create digital content such as videos, images, audio, and text. Unlike content accessibility, which focuses on making finished content consumable by people with disabilities,…

Content Creator(also: Creator, Video Creator, Content Producer)

An individual or organization that produces and publishes digital content—such as videos, articles, podcasts, or social media posts—typically on online platforms. In disability and health communities, content creators include people with lived experience sharing personal…

Content Description(also: contentDescription, Android Content Description)

A text attribute on Android UI elements that provides an accessible label for screen readers like TalkBack. Content descriptions serve the same purpose as alt text on web images — they convey the meaning or function of visual elements to users who cannot see them. For…

Content Dictionary(also: CD, OpenMath Content Dictionary)

A formal specification in the OpenMath standard that provides the definition, description, and properties of a collection of related mathematical symbols. Each Content Dictionary defines symbols used in a particular mathematical domain (such as arithmetic, linear algebra, or…

Content Domestication(also: Media Domestication)

The process of translating or adapting media content to meet the specific needs of a target audience during production rather than through post-hoc modifications. Originating from media studies and audiovisual translation, content domestication in accessibility involves…

Content Element(also: Visual Content Element, Non-Text Content)

A visual component within a document that conveys information beyond running text, including tables, charts, images, diagrams, equations, and code blocks. Content elements are often chosen for their ability to communicate complex information concisely and visually, but they…

Content Extraction(also: Web Content Extraction, Text Extraction)

The process of separating meaningful content from the surrounding structural markup, navigation elements, and boilerplate text on a web page. For assistive technology users, content extraction is valuable because it allows them to focus on the substantive information on a page…

Content Filtering(also: Content Adaptation, Adaptive Content Delivery)

The process of selectively displaying or hiding portions of digital content based on user preferences, roles, device capabilities, or accessibility needs. In an accessibility context, content filtering allows users to control the level of detail they receive, reducing…

Content Focus(also: Content Focus Mode, Presentation Focus)

A video layout customization option that enlarges and centers the primary visual content being discussed—such as presentation slides, demonstrations, or graphical illustrations—while removing or minimizing other visual elements like the speaker and auxiliary overlays. Content…

Content Management System(also: CMS)

Software that enables users to create, edit, and publish digital content — typically web pages — without requiring direct coding knowledge. Popular examples include WordPress, Drupal, and SharePoint. In the accessibility context, CMS platforms play a critical role because they…

Content Moderation(also: Content Filtering, Automated Content Moderation)

The process of monitoring and filtering user-generated content on digital platforms, increasingly performed by AI systems. Content moderation has documented negative effects on people with disabilities: automated systems have suppressed content from disabled creators (TikTok…

Content Personalization(also: Accessibility Personalization, Content Adaptation)

The practice of tailoring digital content presentation and interaction to match individual users' needs, preferences, and abilities. In accessibility, personalization goes beyond one-size-fits-all approaches by allowing users to specify how they prefer to receive information —…

Content Prioritization(also: Content Ranking, Element Prioritization)

The process of ranking or scoring web page elements by their relevance or importance to a user's task, enabling the interface to highlight critical content and de-emphasize less relevant material. Content prioritization can be achieved through AI-powered relevance scoring, where…

Content Quality(also: Information Quality)

The accuracy, reliability, completeness, and trustworthiness of information presented in digital content. For health-related and disability-related content on social media and video platforms, content quality is a critical concern because misinformation can lead to harmful…

Content Re-Rendering(also: Content Transformation, Accessible Re-Rendering)

The process of taking content from one format or presentation and transforming it into a different format that is more accessible or usable for a specific audience. In accessibility, content re-rendering typically involves converting visually-encoded information (images, PDFs,…

Content Rearrangement(also: Information Rearrangement, Content Reordering, Page Restructuring)

An accessibility technique in which the content of a web page is automatically reorganised to present the most relevant information first, based on user context, intent, or navigational history. Content rearrangement addresses the sequential nature of screen reader output by…

Content Script(also: Content Scripts)

Code injected by a browser extension that runs in the context of a specific web page, with direct access to the page's DOM via standard JavaScript APIs. Content scripts let extensions read and modify page content (including adding accessibility features such as contrast…

Content Security Policy(also: CSP)

An HTTP response header that allows web developers to restrict which sources of content (scripts, styles, images, frames, etc.) a browser will load for a given page, mitigating cross-site scripting and data injection attacks. CSP interacts with browser extensions because strict…

Content Simplification(also: Content-Level Simplification)

Simplification approaches that modify the actual informational content of text, including summarization, removal of non-essential details, and restructuring of information presentation. Content simplification goes beyond lexical and syntactic simplification (which preserve all…

Content Summarization(also: Text Summarization, Automated Summarization)

The process of condensing longer text content into shorter, focused summaries that capture the essential information. In accessibility contexts, content summarization addresses the information overload that screen reader users face when navigating verbose or redundant web…

Content Transcoding(also: Content Adaptation, Content Transformation)

The process of automatically modifying web content to make it more accessible or usable for specific users or devices. Content transcoding can involve restructuring HTML, modifying CSS styles, replacing images with text alternatives, simplifying page layouts, or converting…

Content Wants(also: Information Wants, Content Preferences)

The specific types of information that a user desires or needs from a piece of content, as opposed to information needs imposed by an external system or standard. In image accessibility research, content wants refer to the particular visual elements (objects, people,…

Content tagging(also: Structural tagging, Semantic tagging)

The process of adding structural markup to document content that identifies the role and meaning of each element. In PDF accessibility, content tagging involves marking regions of a document as paragraphs, headings, lists, tables, figures, or artifacts so that assistive…

Context Awareness(also: Context-Aware Computing, Situational Awareness)

The capability of a system to sense and respond to its environment without requiring explicit input from the user. In assistive technology, context-aware systems infer what a user is doing based on sensor data—such as camera images, motion sensors, or object tracking—rather than…

Context Engineering(also: Context management)

The practice, in LLM-based systems, of deliberately selecting, structuring, and injecting the information an AI model sees on each call — beyond just the user's latest message — so that outputs are grounded, relevant, and aligned with the user's actual situation. Typical context…

Context Leakage(also: chat session context bleed)

A failure mode in conversational AI systems in which information from earlier, unrelated chat sessions or turns influences the current response, producing output that blends contexts — for example, mixing VoiceOver (macOS) instructions into a JAWS (Windows) troubleshooting…

Context Retention(also: Conversational Context, Context Awareness)

The ability of a voice assistant or AI system to maintain awareness of previous interactions and use that information to interpret subsequent commands correctly. In calendar accessibility, context retention is important because scheduling tasks often involve multi-turn…

Context of Use(also: Use Context, Usage Context)

The combination of users, tasks, equipment (hardware, software, and materials), and the physical and social environments in which a product or service is used. In accessibility, context of use is a critical consideration because the same website may present different barriers…

Context-Appropriate Technology(also: Appropriate Technology, Context-Appropriate AT)

Technology, particularly assistive technology, that is designed or selected to fit the specific social, economic, cultural, and environmental context in which it will be used. Context-appropriate technology considers factors such as local infrastructure, available materials,…

Context-Aware(also: Context-Aware Design, Context-Sensitive)

An approach to designing systems, content, or interfaces that adapt their behavior or output based on the context in which they are used, including the user's goals, the platform or source where content appears, environmental conditions, and user preferences. In accessibility,…

Context-Aware Computing(also: Context Awareness, Situational Awareness Computing)

Computing systems that can sense and adapt their behavior based on the user's current context, including location, activity, environment, and task state. In accessibility, context-aware systems go beyond static information delivery to provide real-time, situation-appropriate…

Context-Aware Interface(also: Context-Sensitive Interface, Adaptive Interface)

A user interface that dynamically adapts its content, features, or behavior based on the user's current context, such as their location, current task, time of day, or the website they are visiting. In cognitive accessibility, context-aware interfaces are particularly valuable…

Context-Free Grammar(also: CFG, Formal Grammar)

A formal system for defining the syntactic rules of a language, consisting of a set of production rules that describe how symbols can be combined to form valid expressions. In accessibility and assistive technology, context-free grammars are significant because they can be used…

Contextual Design(also: Context-Sensitive Design, Situated Design)

A design approach that grounds technology development in a deep understanding of users' actual contexts, workflows, constraints, and cultural settings, rather than designing for idealized or generic use cases. Contextual design is particularly critical for assistive technology…

Contextual Factors

The characteristics of a person, their tools, or their environment that influence experiences of access or inaccessibility. Contextual factors include identity-related factors (race, gender, class, age, language, religion, sexuality, body size), social contexts (who one is…

Contextual Inquiry(also: CI, Contextual Interview)

A user research method in which a researcher observes and interviews a participant in their natural work or living environment while they perform their typical tasks. The researcher adopts an apprentice role, watching the participant work and asking questions to understand their…

Contextual Integrity(also: CI, Contextual Privacy)

A privacy framework developed by Helen Nissenbaum that defines privacy not as secrecy but as the appropriate flow of information according to context-specific norms. According to contextual integrity, privacy is violated when information flows deviate from the norms governing a…

Contextual Learning(also: Context-Dependent Learning)

The tendency of both humans and AI systems to learn patterns and behaviours from the surrounding context rather than from abstract rules. In web development, contextual learning means that developers working on accessible codebases are more likely to produce accessible code…