Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Cognitive Accessibility(also: Cognitive A11y)
- The practice of designing digital content and interfaces to be usable by people with cognitive, intellectual, learning, and neurological disabilities. Cognitive accessibility addresses barriers related to attention, memory, problem-solving, comprehension, and executive function.…
- Cognitive Cycle(also: Cognitive Processing Time, Cognitive Response Time)
- In the Model Human Processor framework, the cognitive cycle represents the time required for a person to process perceived information and make a decision about how to respond. A single cognitive cycle is approximately 70-110 milliseconds. Research with motion-impaired users has…
- Cognitive Disability(also: Cognitive Impairment, Intellectual and Developmental Disability)
- A broad category of disabilities affecting cognitive functions such as memory, attention, problem-solving, learning, and information processing. Cognitive disabilities may be developmental (present from birth or early childhood, such as Down syndrome or intellectual disability)…
- Cognitive Theory of Multimedia Learning(also: CTML, multimedia learning theory)
- A theory developed by Richard E. Mayer proposing that people learn more effectively from words and pictures together than from words alone, because the brain processes visual and auditory information through separate working-memory channels. CTML underpins design principles such…
- Collaborative Memory(also: Distributed Cognition, Shared Memory)
- The process by which memory tasks and cognitive load are distributed across multiple people, typically within families or close social groups. In the context of disability and caregiving, collaborative memory refers to how family members collectively manage the memory needs of a…
- Cross-Modal Perception(also: Multisensory perception, Cross-modal integration)
- The neural and perceptual integration of information arriving through two or more sensory channels — such as vision, hearing, touch, and proprioception — into a coherent experience of the world. Cross-modal perception explains phenomena such as the McGurk effect,…
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