Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 103 of 333
- Dual User Interface (Dual Interface, Concurrent Accessible Interface)
- An interface design approach in which two distinct, purpose-built user interfaces are provided simultaneously for different user groups — typically one visual interface for sighted users and one non-v…
- Dual-Positioned Researcher (Dual Positioning, Insider-Outsider Researcher)
- A researcher who holds both the role of investigator and the lived experience of the condition or community being studied — for example, a person with OCD studying OCD, or a Deaf researcher studying D…
- Duality (Dual Lives)
- The practice of managing plural identities across different contexts, where a person lives dual work lives and maintains separate identity presentations depending on the stakeholders they are interact…
- Duchenne Muscular Dystrophy (DMD, Duchenne MD)
- Duchenne Muscular Dystrophy (DMD) is a severe genetic disorder characterized by progressive muscle degeneration and weakness, caused by mutations in the dystrophin gene on the X chromosome. It primari…
- Dunning-Kruger Effect
- A cognitive bias in which people with limited knowledge or competence in a domain overestimate their ability, while those with greater expertise tend to underestimate their relative skill. In accessib…
- Duoethnography
- A collaborative qualitative research method in which two researchers with differing perspectives examine a shared topic through dialogue, juxtaposing their personal experiences to generate deeper unde…
- Duxbury Braille Translator (Duxbury, DBT)
- A commercial Braille translation software package (Duxbury Systems) widely used by transcribers and production agencies to convert print text and documents into contracted and uncontracted Braille, in…
- Dwell Activation (Dwell Click, Dwell Selection)
- An input method where an action is triggered by maintaining focus on a target for a specified period of time (the dwell time). Commonly used with eye tracking and head tracking systems, dwell activati…
- Dwell Control (Dwell Click, Dwell Selection, Dwell-Time Activation)
- An input method in which a user activates a target — such as a button, link, or key — by holding a pointer or gaze over it for a specified period of time rather than clicking or tapping. Dwell control…
- Dwell Selection (Dwell Click, Dwell Time Selection, Hover Click)
- An interaction technique where a user activates or selects an on-screen element by keeping a cursor, gaze point, or pointer within the target area for a specified duration (the dwell time), rather tha…
- Dwell Time (Gaze Dwell, Fixation Duration)
- The length of time a user must maintain their gaze on a target element to trigger a selection in eye gaze technology systems. Dwell time is a critical parameter in gaze-based interfaces: too short and…
- Dwell-Based Selection (Dwell Selection, Dwell Time Selection)
- An interaction technique used in eye-gaze and head-tracking interfaces in which holding the cursor over a target for a fixed duration (the 'dwell time', typically 300-1000 ms) triggers a selection, re…
- Dyadic Interaction (Dyad Interaction, Paired Interaction)
- Social interaction between two individuals, studied as the fundamental unit of social exchange. In accessibility and intervention research, dyadic interaction is often examined in contexts such as chi…
- Dynamic Accessibility Analysis (Runtime Accessibility Testing, Dynamic A11y Analysis)
- An approach to detecting accessibility issues by testing an application while it is running on a device or emulator, examining the actual rendered user interface rather than just the source code. Tool…
- Dynamic Bayesian Network (DBN, Temporal Bayesian Network)
- A probabilistic graphical model that represents sequences of variables over time, extending standard Bayesian networks to handle temporal relationships. In accessibility and affective computing contex…
- Dynamic Caption Tracking (Word-by-Word Highlighting, Synchronized Caption Highlighting)
- A caption display feature that highlights or visually emphasizes the word currently being spoken in the caption text, synchronized with the audio. Dynamic caption tracking helps viewers maintain their…
- Dynamic Content (Dynamic Web Content, Live Content)
- Dynamic content refers to web page elements that change or update after the initial page load, either automatically (such as news tickers, stock prices, or chat messages) or in response to user intera…
- Dynamic Content Filtering (Intelligent Content Filtering, AI-Based Filtering)
- The automated process of selectively showing or hiding web content based on computed relevance to a user's goals, preferences, or context. Dynamic content filtering uses AI models (such as large langu…
- Dynamic Difficulty Adjustment (DDA, Adaptive Difficulty)
- A system design approach that automatically or manually adjusts the precision, complexity, or challenge level of feedback and interaction based on the user's skill level and progress over time. Origin…
- Dynamic Disability (Fluctuating Disability, Variable Disability)
- A disability or impairment whose severity, manifestation, or impact varies over time — sometimes rapidly — rather than remaining constant. Dynamic disabilities are common in many health conditions suc…