Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Chatbot(also: Virtual Assistant, Conversational Agent, Dialog System)
- A software application that uses text or speech to conduct conversations with users, simulating human-like dialogue to provide information, perform tasks, or guide users through processes. In accessibility, chatbots and conversational user interfaces present both opportunities…
- Chatbot Accessibility(also: Accessible Chatbot Design, CUI Accessibility)
- The practice of designing chatbots and conversational user interfaces (CUIs) to be usable by people with disabilities. Chatbot accessibility presents unique challenges compared to traditional web accessibility because CUIs involve dynamic, dialogue-based interactions rather than…
- 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,…
- Intelligent Virtual Assistant(also: IVA, Virtual Assistant, AI Assistant)
- A software-based agent that uses artificial intelligence, natural language processing, and speech recognition to understand and respond to human voice or text commands. Intelligent Virtual Assistants such as Amazon Alexa, Google Assistant, and Apple Siri are embedded in smart…
- Push-to-Talk(also: PTT, Push to talk)
- An interaction pattern where a user presses and holds (or taps) a dedicated button to signal the start of an input — historically used in two-way radios, now common in voice assistants and conversational interfaces as an alternative to continuous listening. In accessibility…
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