Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 319 of 333
- Visualization Question Answering (Chart QA, Visualization QA, VisQA)
- A class of interactive systems that let users ask natural-language questions about a data visualization — a chart, graph, or map — and receive direct textual or spoken answers rather than having to in…
- Visually Impaired (Vision Impairment, Visual Impairment, BVI)
- An umbrella term for any degree of reduced visual function that cannot be fully corrected with standard glasses or contact lenses, ranging from mild low vision to total blindness. The term is frequent…
- Visuocentric Design (Visual-First Design, Deaf-Centric Design)
- An approach to interface and content design that prioritizes visual communication and spatial organization, particularly for users of visual languages like sign languages. Visuocentric design recogniz…
- Visuospatial Attention (Visual-Spatial Attention, Visuospatial Processing)
- The cognitive ability to attend to, process, and mentally manipulate visual and spatial information in the environment. Visuospatial attention involves orienting to locations in space, tracking object…
- Viterbi Algorithm
- The Viterbi algorithm is a dynamic-programming procedure for finding the most likely sequence of hidden states in a Hidden Markov Model given a sequence of observations. It is the standard solution to…
- Vitiligo
- A chronic skin condition in which patches of skin lose their pigment, resulting in irregular white or light areas on the body. Vitiligo can affect people of any skin tone but is more visually apparent…
- VizWiz
- A mobile application and research platform that allows blind people to take photos with their phones and receive answers to visual questions from human workers or AI systems. VizWiz originated as a re…
- Vlog (Video Blog, Video Blogging, Vlogging)
- A video-based form of blogging where individuals create and share content through recorded video rather than written text. For Deaf communities, vlogging has become a particularly important communicat…
- Vocal Development (Speech Development, Vocal Production Development)
- The process by which individuals acquire and refine the ability to produce speech sounds and vocalizations. In typically developing children, vocal development progresses through stages from cooing an…
- Vocal Joystick (VJ, Voice Joystick)
- A voice-based human-computer interface that uses continuous non-verbal vocal sounds (rather than spoken words) to provide proportional, real-time control of devices, cursors, or robotic systems. The V…
- Vocal Programming (Voice Coding, Speech-Based Programming, Voice Programming)
- The practice of writing, editing, and navigating computer code using speech recognition rather than keyboard input. Vocal programming is an important accessibility concern because conventional softwar…
- Vocal Source Identity
- Vocal Source Identity is an auditory display principle referring to the use of different speaking voices or sound sources to convey distinct types of information in an audio interface. In the context …
- Vocal Stereotypy (Vocal Stereotypies, Vocal Stim)
- Repetitive, non-functional vocalizations that serve no apparent communicative purpose, commonly observed in individuals with autism spectrum disorder and other developmental disabilities. Vocal stereo…
- Vocalization Analysis (Vocal Analysis, Infant Vocalization Analysis)
- Vocalization analysis is the systematic study and measurement of vocal productions, including speech, pre-speech sounds, and non-speech vocalizations. In developmental and clinical contexts, vocalizat…
- Vocational Inclusion (Employment Inclusion, Labor Market Inclusion)
- The meaningful participation of people with disabilities in the labor market, encompassing not just job placement but access to professional development, training, career advancement, and equitable wo…
- Vocational Rehabilitation (VR, Employment Rehabilitation)
- Services and programs designed to help people with disabilities prepare for, obtain, maintain, or return to employment. Vocational rehabilitation may include assessment, counseling, training, job plac…
- Vocational Training (Vocational Education, Job Training, Occupational Training)
- Vocational training is education focused on developing practical skills and knowledge required for specific occupations or trades. In accessibility contexts, vocational training for people with disabi…
- Voice Acting (Voice Performance, Character Voicing)
- The performance art of providing voices for characters, narration, and other spoken content in media such as animation, audiobooks, games, and audio-described content. In accessible media production, …
- Voice Activity Detection (VAD, Speech Detection)
- A signal processing technique that automatically determines whether a segment of audio contains human speech or not. In accessibility applications, voice activity detection is used in audio descriptio…
- Voice Assistant (Virtual Assistant, Smart Speaker)
- An AI-powered system that responds to voice commands to perform tasks, answer questions, and control devices, such as Amazon Alexa, Google Assistant, and Apple Siri. Voice assistants have accessibilit…