Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 239 of 333
- Reflexivity (Researcher Reflexivity)
- A research practice in which scholars continuously examine how their own identities, positions, assumptions, disciplinary training, and power relationships shape the research they conduct — the questi…
- Refractive Error (Refractive Disorder, Ametropia)
- Refractive error is a common vision condition in which the shape of the eye prevents light from focusing correctly on the retina, resulting in blurred vision. Types include myopia (nearsightedness), h…
- Refreshable Braille Display (Braille Display, Braille Terminal, Refreshable Tactile Display, RBD)
- An electromechanical device that renders Braille characters by raising and lowering small pins through a flat surface, allowing blind users to read digital text output by touch. These devices connect …
- Refreshable Braille Display (Refreshable Braille, Dynamic Braille Display, Electronic Braille Display)
- An electromechanical device that renders Braille characters by raising and lowering pins dynamically, allowing blind users to read digital text through touch. Conventional refreshable Braille displays…
- Refreshable Graphics Display (Tactile Graphics Display, Dynamic Tactile Display)
- A device that presents tactile graphics and diagrams through an array of pins that can be individually raised or lowered to create dynamic, changeable tactile patterns. Unlike static tactile graphics …
- Refreshable Tactile Display (RTD, Refreshable Braille Display, Dynamic Tactile Display)
- An electronic device that presents tactile graphics and content through an array of small pins that can be independently raised or lowered to create dynamic, changeable tactile surfaces. Unlike tradit…
- Region of Interest (ROI, Area of Interest, AOI)
- A specific area within an image, video frame, or user interface that has been identified as particularly relevant or important for analysis or user attention. In eye-tracking research, regions of inte…
- Regional Sign Variation (Sign Language Dialect, Regional Sign Dialect)
- Regional sign variation refers to systematic differences in the form of signs across geographic regions within a single sign language, analogous to dialects in spoken languages. Variation arises from …
- Regression (Regressive Saccade, Regressive Eye Movement)
- In the context of reading and eye tracking, a regression is a backward eye movement (right-to-left in left-to-right scripts) where the reader returns to previously read text. Regressions typically occ…
- Rehabilitation (Rehab, Therapeutic Rehabilitation)
- A set of interventions designed to restore or optimize functioning and reduce disability in individuals with health conditions. Rehabilitation may address physical, cognitive, sensory, or communicatio…
- Rehabilitation Engineering (Rehab Engineering)
- An engineering discipline focused on quantifying, measuring, and modeling human performance to provide better-fitting assistive technology adaptations. Rehabilitation engineering emerged partly as a r…
- Rehabilitation Gaming (Rehab Gaming, Therapeutic Gaming)
- The use of digital games that incorporate physical rehabilitation exercises into gameplay, transforming repetitive therapeutic movements into engaging interactive experiences. Rehabilitation games map…
- Rehabilitation science (Rehabilitation research)
- An interdisciplinary field focused on understanding and improving function, independence, and quality of life for people with disabilities, injuries, or chronic conditions. Rehabilitation science draw…
- Reification
- The process of making concrete that which is abstract. A photograph is a reification of a moment in time and place, with all the selectivity and distortion that the lens and framing impose. A web page…
- Reinforcement Learning (RL)
- A type of machine learning where a system learns to make decisions by performing actions in an environment and receiving rewards or penalties based on the outcomes. Unlike supervised learning, which l…
- Reinforcement Learning from Human Feedback (RLHF)
- A machine learning technique used to fine-tune large language models by incorporating human judgments about response quality. Human annotators rank or rate model outputs, and this feedback trains a re…
- Rejection Sensitivity (Rejection Sensitive Dysphoria, RSD)
- An intense emotional response to perceived or actual rejection, criticism, or failure that is commonly experienced by neurodivergent individuals, particularly those with ADHD and autism. Rejection sen…
- Rejection Sensitivity Dysphoria (RSD)
- An intense, disproportionate emotional response to perceived or actual rejection, criticism, or failure, commonly reported by people with ADHD and often linked to trauma from chronic social rejection …
- Relational Accessibility (Relational Access)
- An approach to accessibility that treats access as something co-constructed between people in everyday life, rather than a property of an individual user, tool, or environment. Relational accessibilit…
- Relational Diagram (Relational Information Display, RID)
- A graphical representation that depicts items (nodes) and the relationships (links) between them using a two-dimensional spatial layout. Common forms include entity-relationship diagrams, flowcharts, …