Glossary

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Chairable(also: Chair-based interface, Wheelchair-integrated technology)

A design concept for input and output devices that are integrated directly into a wheelchair frame, enabling users to interact with assistive technology without requiring a separate smartphone, wearable device, or other external hardware. Chairables might include thin flexible…

Chairable computing(also: Chairable input, Wheelchair-integrated computing)

A design paradigm in which input devices and computing interfaces are integrated into the form factor of a wheelchair — particularly armrests, trays, and frames — analogous to how wearable computing fits with clothing. Chairable devices are always within reach, require no setup…

Clarifying Question(also: Clarifying Questions, Counter-Question)

A clarifying question is a follow-up query posed by a system or interlocutor to resolve ambiguity, fill missing context, or confirm intent before acting on a user's request. In conversational interfaces, clarifying questions are a core mechanism of mixed-initiative interaction:…

Click-Time Distribution(also: Timing Profile, Click Precision)

A statistical model of when a switch user activates their switch relative to a target timing event, used to characterize the precision and consistency of a user's motor control. In the Nomon interface, the click-time distribution measures how accurately a user clicks when a…

Click-on-Lift(also: Lift-off Activation, Release Activation)

An interaction technique where a touch target is activated only when the user lifts their finger from the screen while still within the target area, rather than registering the action at the point of initial contact. This approach is particularly beneficial for users with hand…

Closed-loop Interaction(also: Closed-Loop Feedback, Perform-Assess-Adjust Cycle)

An interaction pattern in which a system continuously observes the user's action, evaluates it, and returns immediate feedback that shapes the next attempt, producing an iterative perform-assess-adjust cycle. Closed-loop interaction contrasts with open-loop designs that present…

Clutching(also: Clutch Mechanism, Clutch Gesture)

In gesture- and motion-based input systems, a mechanism that lets the user temporarily disengage the recogniser so that everyday, non-communicative movements — reaching, adjusting posture, gesturing socially — do not trigger false activations. Named after the mechanical clutch…

Cocktail party effect(also: Selective auditory attention)

The well-documented human ability to focus auditory attention on a single speech source among multiple simultaneous conversations, while still detecting relevant information (such as one's name) in unattended streams. The cocktail party effect is foundational to the design of…

Cognitive Forcing Function(also: Cognitive Forcing)

A design technique that deliberately disrupts automatic cognitive processing to prompt users to engage in more deliberate, analytical thinking. In human-AI interaction, cognitive forcing functions are used to reduce over-reliance on AI outputs — for example, by asking users to…

Command-Line Interface(also: CLI, Command-Driven Interface, Command Interface)

A user interface style in which the user types textual commands, usually following a defined syntax, to drive a system. Command-line interfaces are typically fast and powerful for expert users, scriptable, and efficient for repetitive work, but require users to memorise commands…

Concurrent speech interface(also: Simultaneous speech, Parallel audio streams)

An interaction paradigm that presents multiple speech audio streams simultaneously, spatially separated using techniques like head-related transfer functions, to enable users to scan or monitor several information items in parallel rather than listening to them sequentially.…

Confidence score(also: Certainty score, Prediction confidence)

A numerical value (typically 0-100% or 0-1) indicating how certain an AI system is about its prediction or classification. In accessibility contexts, communicating confidence scores to users — particularly blind users who cannot visually verify AI output — helps them calibrate…

Confirmation Dialogue(also: Confirmation Dialog, Verification Prompt)

An interaction pattern where a system summarizes a proposed action and asks the user to confirm before executing it. In accessible calendar design and voice assistant interactions, confirmation dialogues are critical for preventing errors—users want the system to summarize…

Consent Model(also: Consent Framework)

A prescriptive framework specifying how consent should be requested, given, sustained, and revoked in a particular interaction context. Examples include affirmative consent (explicit verbal agreement), embodied consent (drawing on bodily and somatic cues), and haptic consent…

Content Prioritization(also: Content Ranking, Element Prioritization)

The process of ranking or scoring web page elements by their relevance or importance to a user's task, enabling the interface to highlight critical content and de-emphasize less relevant material. Content prioritization can be achieved through AI-powered relevance scoring, where…

Context Retention(also: Conversational Context, Context Awareness)

The ability of a voice assistant or AI system to maintain awareness of previous interactions and use that information to interpret subsequent commands correctly. In calendar accessibility, context retention is important because scheduling tasks often involve multi-turn…

Continuous Specification(also: Continuous Positioning, Continuous Cursor Movement)

In cursor control interfaces, a positioning method where the cursor moves steadily in a given direction at a controlled rate until the user signals it to stop. This approach allows precise positioning because the user can halt movement at exactly the desired location, but it is…

Conversational AI(also: Chat AI, AI Chatbot)

Artificial intelligence systems designed to engage in dialogue with users through natural language, including chatbots, virtual assistants, and generative AI interfaces. Conversational AI has accessibility implications both as an interaction paradigm that can be more accessible…

Conversational Gesture(also: Interaction Gesture, Dialogue Primitive)

A conversational gesture is an atomic building block of human-computer dialogue — a simple, well-defined interaction pattern that enables communication between user and machine. In graphical user interfaces, conversational gestures are realised through widgets such as list…

Conversational Interface(also: Conversational UI, Voice User Interface, VUI)

A user interface that enables interaction through natural language, either spoken or typed, allowing users to communicate with a system using conversational dialogue rather than traditional graphical controls. Conversational interfaces include voice assistants, chatbots, and…

Conversational Interface(also: Conversational UI, Conversational User Interface, Chat Interface)

An interface that enables interaction through natural language dialogue, either spoken or text-based, rather than through traditional graphical controls like buttons and menus. Conversational interfaces are significant for accessibility because they can reduce cognitive load,…

Conversational User Interface(also: CUI, Conversational Interface, Dialogue Interface)

A user interface that enables interaction through natural language conversation, either via voice (spoken dialogue) or text (chat). Conversational user interfaces encompass voice assistants, chatbots, and dialogue systems that interpret user intent and respond in natural…

Coordinated Views(also: Linked Views, Coordinated Multiple Views, Brushing and Linking)

A data visualization technique in which multiple representations of the same dataset are displayed simultaneously and kept synchronized, so that actions in one view (such as selecting, filtering, or sorting) are immediately reflected in all other views. In accessible data…

Corrective feedback(also: Error correction feedback, Instructional feedback)

Specific information provided to a user after an action that identifies what was done incorrectly and how to improve on the next attempt. In accessible interaction design, corrective feedback for blind users is typically delivered through text-to-speech (e.g., "make it longer,"…

Cross-Filtering(also: Interactive Filtering, Linked Filtering)

A dashboard interaction technique where applying a filter in one component (such as selecting a category in a chart or using a dropdown widget) automatically updates the data displayed in other related components throughout the dashboard. Cross-filtering enables users to explore…

Cross-Modal Consistency(also: Multimodal Consistency, Cross-Modal Alignment)

The alignment and coherence of information presented simultaneously through different sensory channels — such as touch and hearing, or vision and sound. In accessible education, cross-modal consistency ensures that what a blind user feels through tactile graphics matches what…

Crossing-Based Interaction(also: Goal Crossing)

An alternative to traditional point-and-click interaction where users select a target by dragging across its boundary rather than tapping or clicking on it. Instead of requiring a precise tap within a target area, crossing-based interaction registers a selection when the user's…

Cursor Control(also: Pointer Control, Cursor Navigation)

The ability to direct and position an on-screen cursor or pointer using an input device such as a mouse, trackball, touchpad, joystick, or eye tracker. Cursor control is a fundamental requirement for interacting with graphical user interfaces and involves both gross movements…

Customizability(also: Customization, Personalization)

The ability for users to modify and configure a system's interface, interaction methods, and behavior to match their individual needs and preferences. In accessibility contexts, customizability is a core design principle that acknowledges the diversity of disabled users'…

Customizable Interface(also: Configurable Interface, User-Customizable UI)

A user interface that allows individuals to modify its appearance, behavior, or content display according to their preferences and needs. In accessibility contexts, customizable interfaces enable users to adjust parameters like font size, color scheme, content density, filtering…

Customization Paradox(also: Paradox of Choice in Customization)

The phenomenon where providing more customization options to reduce barriers paradoxically creates new barriers through increased cognitive load, decision fatigue, and distraction from the customization interface itself. The customization paradox is particularly acute for ADHD…

31 results.