Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 272 of 333
- Spastic Quadriplegia (Spastic Tetraplegia)
- The most severe subtype of spastic cerebral palsy, characterised by stiff, tight muscles (spasticity) and significantly reduced voluntary movement in all four limbs and often the trunk. People with sp…
- Spastic Triplegia (Triplegic Cerebral Palsy)
- A form of cerebral palsy in which three limbs are affected by spasticity (muscle stiffness), typically both legs and one arm. This condition presents unique challenges for assistive technology use bec…
- Spasticity (Muscle Spasticity, Hypertonia)
- A condition in which muscles are continuously contracted or stiff, causing tightness and resistance to movement. Spasticity is a common symptom of cerebral palsy, multiple sclerosis, spinal cord injur…
- Spatial Anchor (World Anchor, Azure Spatial Anchor)
- A reference point in physical space used to precisely position and lock virtual content to real-world locations in augmented reality applications. Spatial anchors ensure that virtual objects remain co…
- Spatial Assessment (Spatial Descriptor)
- The use of spatial attributes such as distance, dimensions, and location to describe objects in a visual scene. Research with blind users has found that spatial assessment descriptors are problematic …
- Spatial Audio (3D Audio, Binaural Audio)
- Audio technology that creates the perception of sound coming from specific locations in three-dimensional space, using techniques such as binaural recording, head-related transfer functions, and multi…
- Spatial Audio (3D Audio, Spatialised Sound, Binaural Audio)
- Audio technology that creates the perception of sound coming from specific locations in three-dimensional space around the listener, using techniques such as head-related transfer functions (HRTFs), b…
- Spatial Awareness (Spatial Cognition, Environmental Awareness)
- The understanding of one's surrounding environment and one's own position within it. In accessibility contexts, spatial awareness encompasses multiple dimensions: the scale and shape of an area, one's…
- Spatial Cognition (Spatial Understanding, Spatial Awareness)
- The mental processes involved in perceiving, storing, recalling, and reasoning about spatial relationships, layouts, and environments. Spatial cognition enables people to form mental maps, navigate th…
- Spatial Computing (Spatial interaction)
- A paradigm of computing in which digital content is rendered and interacted with in three-dimensional physical space, typically via head-worn augmented or mixed reality devices (e.g., HoloLens, Magic …
- Spatial Grammar (Spatial Syntax)
- Spatial grammar is the set of grammatical rules that signed languages express through the three-dimensional signing space in front of the signer, rather than through linear word order. Signers establi…
- Spatial Inflection (Verb Agreement, Directional Verb, Inflecting Verb)
- A grammatical process in sign languages where the motion path and orientation of a verb sign are modified based on the 3D locations in space that have been assigned to its subject and/or object during…
- Spatial Learning (Spatial Cognition, Environmental Learning)
- The process of acquiring and integrating information about an environment into cognitive maps — mental representations of spatial relationships between places, paths, and landmarks. For sighted indivi…
- Spatial Mapping (Environment Mapping, 3D Environment Scanning)
- A technology used in mixed reality and augmented reality headsets that scans and creates a digital representation of the physical environment in real time. Spatial mapping identifies surfaces such as …
- Spatial Memorization (Spatial Memory Strategy, Kitchen Layout Memory)
- A compensatory strategy used by blind and low vision individuals to navigate and interact with environments by memorizing the spatial layout of objects, tools, and landmarks. In cooking, spatial memor…
- Spatial Navigation (Spatial Orientation, Spatial Wayfinding)
- The cognitive process of determining and following a route from one location to another, involving the ability to remain oriented, recall routines, recognize landmarks, and make decisions at choice po…
- Spatial Orientation (Spatial Awareness, Orientation and Mobility)
- The ability to understand one's position and the arrangement of objects within a physical or digital environment. For blind and low vision users, spatial orientation relies on non-visual cues includin…
- Spatial Orientation and Navigation (SON, Orientation and Navigation)
- The set of skills and strategies used to understand one's position in space, plan routes, and travel from one location to another. For blind and low-vision individuals, spatial orientation and navigat…
- Spatial Presence (Sense of Presence)
- Spatial presence is the subjective experience of feeling physically located within a virtual or mediated environment — the sensation of "being there" rather than merely observing content on a screen. …
- Spatial Reasoning
- The cognitive process of understanding where objects are, how they are oriented, and how they relate to each other in three-dimensional space. Spatial reasoning is central to tasks like assembling pro…