Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- CAPTCHA(also: Completely Automated Public Turing test to tell Computers and Humans Apart)
- A challenge-response test used on websites to determine whether a user is human, typically requiring users to identify distorted text, select images, or solve puzzles. CAPTCHAs present significant accessibility barriers, particularly for users with visual impairments who cannot…
- Capacitive Touchscreen(also: Capacitive Touch Display, Cap Touch)
- A capacitive touchscreen is a type of display that detects touch input by sensing changes in the electrical field caused by the conductivity of a human finger or conductive stylus. Unlike resistive touchscreens that require physical pressure, capacitive screens respond to the…
- Conditional Formatting
- Conditional formatting is a spreadsheet feature that automatically applies visual styles — fill color, font color, bold text, icons, data bars — to cells whose values meet specified rules (for example, highlighting failing grades in red or above-average sales in green). It is…
- Cybersickness(also: VR Sickness, Simulator Sickness, Virtual Reality Motion Sickness)
- A form of motion sickness experienced during virtual reality use, characterized by symptoms including nausea, disorientation, dizziness, eye strain, and general discomfort. Cybersickness occurs due to sensory conflicts between what the visual system perceives (movement in the…
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