Glossary

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Acts of Assistance

A framework for designing human-machine interactions in cognitive assistive systems, drawing on speech acts theory from linguistics. Each act of assistance is a structured communication from the system to the user, defined by its message type (such as recall, indicate, or…

Broad-Shallow Interface(also: Broad-Shallow UI, Single-Page Interface)

A user interface design pattern that presents a large amount of information on fewer screens, typically requiring scrolling to view all content. Most mainstream apps, including Google Calendar, use this approach. While efficient for experienced users who can quickly scan and…

Carousel(also: Image Carousel, Content Carousel, Slider Carousel)

A UI pattern that displays a rotating series of content items (images, cards, teasers) in a single area, typically navigated by swipe, arrows, or auto-advance. Carousels pose well-known accessibility risks: auto-rotation can violate WCAG 2.2.2 (Pause, Stop, Hide), items beyond…

Design Pattern(also: Interaction Pattern, Pattern of Assistive Interaction)

A reusable, generalised description of a solution to a commonly recurring design problem, expressed in a way that can be applied across different contexts without prescribing a specific implementation. In assistive technology design, interaction patterns describe the functional…

Hamburger Menu(also: Hamburger Icon, Menu Icon)

A UI pattern using three stacked horizontal lines (☰) to hide and reveal a primary navigation menu, most commonly on mobile interfaces. Accessibility considerations include the need for an accessible name (e.g., aria-label="Menu"), keyboard operability, proper focus management…

Narrow-Deep Interface(also: Narrow-Deep UI, Wizard Interface, Step-by-Step Interface)

A user interface design pattern that presents information across many screens, with only a small amount of content per screen. Users navigate through multiple sequential screens rather than scrolling through dense content. This approach reduces cognitive load by focusing…

Revocable Consent(also: Withdrawable Consent)

A consent pattern in which the user can withdraw their previously granted permission at any time, typically through a persistent, discoverable UI control that immediately halts data processing and triggers deletion of data collected under that consent. A stronger form than…

Slider(also: Content Slider, Swipe Slider)

A UI pattern where content items are arranged horizontally and navigated by swiping or tapping arrow controls, exposing one or a few items at a time. Unlike carousels, sliders typically do not auto-advance. Accessibility concerns overlap with carousels: keyboard access,…

Stepper(also: Step Indicator, Wizard Stepper)

A UI pattern that breaks a multi-step process — such as checkout, registration, or booking — into numbered or labeled stages with a visual progress indicator. Steppers reduce cognitive load by showing users where they are, what they have completed, and what remains, and are…

Wizard Design Pattern(also: Wizard Interface, Step-by-step Interface, Guided Task Flow)

An interface design pattern that breaks complex tasks into a series of simple, sequential questions or steps. Rather than presenting all options simultaneously, a wizard guides users through one decision at a time, reducing cognitive load and the need for prior system knowledge.…

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