Glossary

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Unimodal Interface(also: Single-Mode Interface)

An interface that accepts input through only one mode or channel of interaction, such as keyboard-only, voice-only, or gesture-only input. In contrast to multimodal interfaces that combine multiple input methods, unimodal interfaces rely on a single input modality for command…

Unistroke Gesture(also: Single-Stroke Gesture, Unistroke)

A unistroke gesture is a shape or symbol drawn in a single continuous stroke on a touch screen or digitizer, which is then recognized by software as a specific command or input. In accessible interfaces for blind users, unistroke gestures provide an efficient way to create…

Unobtrusive Interaction(also: Unobtrusive Interfaces)

A design orientation, associated with ambient, wearable, and assistive-technology research, that aims to minimise disruption to users' natural behaviour, attention, and social presence. Rather than demanding foreground engagement (pulling up a phone, pressing through menus,…

User Agency(also: User Control, User Autonomy)

The degree to which users maintain control over their interactions with a system, including the ability to make choices, adjust system behavior, override automated decisions, and understand what the system is doing on their behalf. In accessibility and AI-powered tools, user…

User Elicitation(also: Elicitation study, Gesture elicitation study, User-defined gestures)

A participatory user-research method, widely used in gesture and interaction design, in which end users or domain experts are shown a desired system effect (a "referent" such as "rotate this object") and asked to propose the input action they believe should trigger it.…

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