Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 263 of 333
- Single Ease Question (SEQ)
- A post-task usability metric consisting of a single 7-point rating scale question asking users how easy or difficult a task was to complete. The SEQ is widely used in usability studies because it is q…
- Single Page Application (SPA)
- A web application architecture that dynamically updates page content in response to user interactions without requiring a full page reload, instead using JavaScript to modify the Document Object Model…
- Single Switch (Single Switch Access, One Switch)
- An assistive technology input device that provides a single binary action — on or off — enabling people with severe motor impairments to interact with computers and communication devices. Switches can…
- Single-Case Study (Single-Subject Design, Single-Case Experimental Design, N-of-1 Study, ABA Design)
- A research methodology in which an individual participant serves as their own control, with systematic measurement of behavior across different conditions such as baseline and intervention phases. The…
- Single-Message AAC Device (BIGmack, Single-Switch Communicator, Voice Output Communication Aid)
- A simple augmentative and alternative communication (AAC) device that records and plays back a single message when activated, typically via a large button or switch. Examples include the BIGmack Switc…
- Single-Page Application (SPA)
- A web application that loads a single HTML document and dynamically updates its content through JavaScript without requiring full page reloads. SPAs use client-side routing and AJAX requests to fetch …
- Single-Source Publishing (Single-Source Authoring, Multi-Channel Publishing)
- An authoring and publishing methodology where content is written and maintained in one master source and then automatically transformed into multiple output formats such as HTML, PDF, Braille, or mobi…
- Single-Subject Case Study (Single-Case Design, N-of-1 Study, Single-Subject Research Design)
- A single-subject case study is a research methodology that focuses on detailed observation and analysis of one individual (or a small number of individuals) over time, rather than comparing group aver…
- Single-Switch Access (One-switch access, Single switch scanning)
- An input method that allows users to control a computer, AAC device, or other technology using only one switch or button. Users with severe motor impairments who cannot operate a keyboard, mouse, or t…
- Single-case experimental design (SCED, N-of-1 design, ABAB design)
- A rigorous research methodology that evaluates intervention effects by systematically alternating between baseline and treatment conditions within individual participants, using each person as their o…
- Singular Value Decomposition (SVD)
- A mathematical technique that decomposes a matrix into three component matrices, used to reduce high-dimensional data to its most important features while preserving essential relationships. In access…
- Sip-and-Puff (Sip and Puff Switch, Pneumatic Switch)
- An assistive technology input device that detects air pressure changes from a user sipping (inhaling) or puffing (exhaling) through a straw or tube to generate control signals. Sip-and-puff systems ar…
- Situated Knowledge (Situated Knowledges)
- A concept from feminist epistemology, developed by Donna Haraway, holding that all knowledge is produced from particular social, bodily, and historical positions rather than from a neutral, objective …
- Situated Learning
- A theory of learning, associated with Jean Lave and Etienne Wenger, which holds that knowledge is not primarily abstract information transferred between minds but an embodied practice acquired through…
- Situated Learning Theory (Situated Cognition)
- An educational theory proposing that learning is most effective when it occurs in authentic contexts naturally tied to the activity, culture, and environment where the knowledge will be used. In sign …
- Situated Play Design (SPD)
- Situated Play Design is a design approach developed by Altarriba Bertran and colleagues that treats play as something emergent from a specific social, physical, and cultural setting rather than someth…
- Situated action (Situated cognition, Situated practice)
- A theoretical framework from sociology and HCI holding that human actions and decisions are fundamentally shaped by the specific social, material, and temporal context in which they occur, rather than…
- Situation Awareness (SA, Situational Awareness)
- The perception and understanding of one's current environment, including the identification of relevant elements, comprehension of their meaning, and projection of their future status. In accessibilit…
- Situational Awareness (Environmental Awareness)
- The perception and understanding of elements in one's environment, including the ability to detect events, comprehend their significance, and anticipate what may happen next. For deaf and hard of hear…
- Situational Disability (Situational Impairment, Contextual Disability)
- A temporary limitation in ability caused by environmental or situational factors rather than a medical condition. Examples include being unable to hear audio in a noisy environment, having limited dex…