Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- ISO 9241-210(also: Human-Centred Design Standard, Ergonomics of Human-System Interaction — Part 210)
- An international standard specifying the principles and activities of human-centred design (HCD) for interactive systems. It defines a six-step iterative process — understanding context of use, specifying user requirements, producing design solutions, and evaluating against…
- Information Transfer Rate(also: ITR, Data Transfer Rate)
- A measure of the speed and accuracy with which a user can communicate information to a computer through an input device, typically expressed in bits per second. Information transfer rate accounts for both the size of the input vocabulary (how many possible commands exist) and…
- Input Exertion(also: Input Effort, Interaction Cost)
- The physical and cognitive effort required to provide input to a digital system, including keystrokes, mouse movements, taps, and voice commands. For people with motor impairments, input exertion is a critical accessibility concern because even small inefficiencies — such as…
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