Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 58 of 333
- Classifiers (Sign Language) (Classifier Predicates, CL (Sign Language))
- Productive handshape-based constructions in sign languages that represent a class of referents — a vehicle, a flat object, a person walking, a small round object — and show their location, movement, s…
- Clear Face Mask (Transparent Face Mask, Window Face Mask, See-Through Mask)
- A face covering that incorporates a transparent panel over the mouth area, allowing deaf and hard of hearing people to lip-read and observe facial expressions during conversation. Clear face masks eme…
- ClearSpeak
- A set of rules for generating natural-sounding spoken descriptions of mathematical expressions, developed by ETS (Educational Testing Service). ClearSpeak uses conversational phrasing like "the fracti…
- Click-Time Distribution (Timing Profile, Click Precision)
- A statistical model of when a switch user activates their switch relative to a target timing event, used to characterize the precision and consistency of a user's motor control. In the Nomon interface…
- Click-on-Lift (Lift-off Activation, Release Activation)
- An interaction technique where a touch target is activated only when the user lifts their finger from the screen while still within the target area, rather than registering the action at the point of …
- Clicking Error (Click Slip, Selection Error)
- An unintended mouse input that occurs during the clicking phase of target selection, distinct from errors in cursor positioning. Common clicking errors include slipping off the target (the cursor move…
- Clinical Dementia Rating (CDR, CDR Scale)
- The Clinical Dementia Rating (CDR) is a five-point staging scale used to characterise the severity of dementia, originally developed by Hughes and colleagues at Washington University in 1982. A clinic…
- Clinical Reasoning (CR)
- The cognitive and reflective process by which healthcare clinicians — particularly physical and occupational therapists — individualize care under patient and contextual uncertainty. Clinical reasonin…
- Clock Drawing Test (CDT)
- The Clock Drawing Test (CDT) is a brief cognitive screening task in which a person is asked to draw a clock face, place the numbers, and set the hands to a specified time (commonly "ten past eleven").…
- Clock Face Method (Clock Position Method, Clock Face Orientation, Clock Method)
- A technique for describing the spatial position of objects relative to a person by using the positions on an analog clock face. For example, an item directly in front of a person is at 12 o'clock, to …
- Clock Position (Clock face position, Clock orientation)
- A method of conveying direction to a person who is blind by mapping the 12-hour clock face onto the user's immediate surroundings, where 12 o'clock is directly ahead, 3 o'clock is to the right, 6 o'cl…
- Clock Technique (Clock Method, Clock Face Direction System)
- An orientation method used in mobility training for blind and visually impaired people in which directions are communicated using the positions on an analogue clock face. The user imagines standing at…
- Clock-Based Directional Audio (Clock-Face Audio Cueing, Clock Position Audio)
- A spatial orientation system that communicates direction to users by referencing positions on a clock face (e.g., "3 o'clock" for right, "12 o'clock" for directly ahead), often combined with distance …
- Close Reading
- A qualitative analytic method in which researchers slowly and attentively examine a text, image, or artifact, documenting observable features and interpretive responses in detail. In accessibility res…
- Closed Captioning (CC, Closed Captions)
- Text displayed on screen that represents dialogue, sound effects, music, and other audio information in video content, which viewers can toggle on or off. Unlike open captions, closed captions are a s…
- Closed Captioning (CC, Closed Captions)
- Text displayed on a screen that transcribes spoken dialogue, identifies speakers, and describes relevant sound effects in video content. Unlike open captions which are permanently embedded in the vide…
- Closed Captions (CC)
- Captions that can be turned on or off by the viewer, as opposed to open captions which are permanently embedded in the video. Closed captions typically include not just dialogue but also descriptions …
- Closed Interpreting (Closed Sign Language Interpreting)
- A proposed accessibility feature for video content where a sign language interpreter video can be toggled on or off and displayed alongside the main video, analogous to closed captions for text. Unlik…
- Closed-Loop Adaptation (Closed-Loop System, Adaptive Loop)
- A system design approach where real-time feedback from sensors or user behavior is continuously monitored and used to automatically adjust the system's response. In accessibility technology, closed-lo…
- Closed-Loop Control (Feedback Control)
- A control strategy in which a system continuously measures the current state, compares it to a desired reference, and adjusts its output to minimize the error. Contrasted with open-loop control, which…