Glossary

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Verification Mechanism(also: Verification System)

A feature or process that allows users to confirm that a system has correctly understood and executed their intended action. In accessible calendar design, verification mechanisms are critical because BLV users cannot quickly visually scan for errors and rely on the system to…

Verification loop(also: Feedback loop, Edit-verify cycle)

An interaction pattern in which a user performs an action, receives feedback about the result, evaluates whether the outcome matches their intent, and decides whether to accept, undo, or refine the action. In non-visual accessibility contexts, verification loops are essential…

Virtual Wall(also: Haptic Wall, Haptic Boundary)

A simulated physical boundary in a haptic interface that the user can feel through a force-feedback device, modelled as a massless plate backed by a spring with stiffness and a damper with viscosity. Virtual walls are used to represent the edges and boundaries of graphical user…

Visual Orchestration(also: Visual Attention Management)

A design orientation, articulated by Huffman et al. (2026), for deliberately coordinating visual cues, salience, timing, and layout so that participants in a shared environment know where to look, when to shift focus, and how interactions unfold — especially for users who rely…

Visual Programming(also: Visual Programming Language, Block-Based Programming)

A programming paradigm that allows users to create programs by manipulating graphical elements — such as blocks, nodes, and connecting paths — rather than writing text-based code. Popular examples include Scratch, LabVIEW, and dataflow systems where blocks represent…

Voice Control(also: Voice Command, Voice-Activated Control)

The ability to operate devices, applications, or systems using spoken commands. Voice control is a key accessibility feature in smart home technology, enabling people with mobility impairments, visual disabilities, or dexterity limitations to independently control their…

Voice Interface(also: Voice User Interface, VUI)

A user interface that accepts spoken language as input and typically provides audio output, enabling hands-free, eyes-free interaction with technology. Voice interfaces are used in voice-activated personal assistants, smart speakers, phone systems, and accessibility tools. For…

Voice Interface(also: Speech Interface, Voice User Interface, VUI)

An interface that allows users to interact with a system using spoken natural language commands rather than keyboard, mouse, or touch input. Voice interfaces range from simple command-and-control systems that recognise fixed phrases to conversational assistants that interpret…

Voice User Interface(also: VUI)

A user interface that enables interaction with a device or system through spoken voice commands and audio responses. Voice user interfaces use speech recognition to interpret user input and text-to-speech or pre-recorded audio for output. For accessibility, VUIs provide an…

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