Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 227 of 333
- Pre-speech Vocalizations (Pre-linguistic Vocalizations, Infant Vocalizations)
- Sounds produced by infants before the development of recognizable speech, including cooing, babbling, and other vocal productions. Pre-speech vocalizations are important predictors of later articulati…
- Precompensation (Display Precompensation, Image Precompensation)
- A technique in visual accessibility that pre-modifies displayed images in a way that is opposite to the optical distortion introduced by a user's eye, so that the image arriving at the retina more clo…
- Prediction Utilization (PU)
- The percentage of opportunities where a user accepts a word prediction rather than continuing to type the word manually. Prediction utilization reflects user trust in a prediction system—higher qualit…
- Predictive AI (Predictive Analytics, Predictive Algorithm)
- AI systems that use machine learning to identify patterns in data and anticipate future outcomes, behaviors, or events. In the context of disability, predictive AI systems have been documented causing…
- Predictive Cursor (Anticipatory Cursor, Offset Cursor)
- A cursor display technique designed to compensate for the delays inherent in speech-based or other high-latency input methods. A predictive cursor shows an indicator ahead of the actual cursor positio…
- Predictive Disambiguation (Dictionary-based Predictive Disambiguation, DBPD, Word Disambiguation)
- Predictive disambiguation is the class of text-entry techniques in which each user input event is intentionally ambiguous (one keystroke covers several possible letters, one swipe covers many possible…
- Predictive Text (Text Prediction, Word Prediction, Autocomplete)
- A software feature that suggests words or phrases as the user types, based on context, language models, and the user's typing history. Predictive text is a significant accessibility feature for people…
- Preference Customization (User Preference Configuration, Personalization Settings)
- The ability for users, particularly those using assistive technologies, to configure how they receive and interact with digital content based on their individual needs, preferences, and context. In ac…
- Preferred Retinal Locus (PRL, Preferred Retinal Location)
- A specific area of the retina outside the damaged macula that a person with central vision loss adopts as their primary fixation point for viewing. When the central fovea is damaged (as in macular deg…
- Prelingual Deafness (Prelingually Deaf, Congenital Deafness)
- Deafness present at birth or acquired before a child has developed spoken language, typically before around age three. Prelingually deaf individuals commonly learn a signed language as a first languag…
- Prelinguistic Development (Pre-Speech Development, Prelinguistic Communication)
- Prelinguistic development refers to the stages of vocal and communicative development that occur before an infant produces meaningful words, typically spanning from birth to approximately 12-18 months…
- Presbycusis (Age-Related Hearing Loss, Presbyacusis)
- A gradual, progressive loss of hearing in both ears that occurs as a natural part of aging, primarily affecting the ability to perceive higher-frequency sounds. Presbycusis is the most common cause of…
- Presbyopia (Age-Related Farsightedness, Loss of Accommodation)
- An age-related vision condition in which the eye gradually loses the ability to focus on nearby objects, typically becoming noticeable after age 40. Presbyopia affects the vast majority of older adult…
- Presbyopia (Age-Related Farsightedness)
- An age-related vision condition where the eye gradually loses its ability to focus on nearby objects, typically becoming noticeable in the early to mid-40s. Presbyopia affects virtually everyone as th…
- Presence (Virtual Presence, Sense of Presence)
- The subjective sense of being in a virtual environment, often described as the feeling of "being there" rather than simply observing a digital display. Presence is a central construct in VR research a…
- Presentation Accessibility (Slide Accessibility, Accessible Presentations)
- The practice of designing and delivering slide-based presentations so that all audience members, including those with disabilities, can access the content. Key principles include verbally describing a…
- Presentation Independence (Presentation-Independent Information)
- The principle that information should be stored and served in formats that can be rendered in visual, auditory, or electronic text form without loss of meaning. Presentation-independent content has no…
- Presentation video (Lecture recording, Recorded lecture)
- A video recording of an instructor delivering content alongside visual materials such as slides, whiteboards, or demonstrations. Presentation videos present unique accessibility challenges because the…
- Preservice Training (Preservice Education, Teacher Preparation)
- The education and training that teachers receive before entering the profession, typically through university degree programs or certification courses. In special education and assistive technology co…
- Preset (Default Configuration, Template Setting)
- A predefined combination of settings or options that can be applied as a group, reducing the number of individual decisions a user needs to make. In accessibility interfaces, presets help users with c…