Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 228 of 333
- Press-and-Listen Paradigm (Sequential Navigation, Linear Content Consumption)
- The fundamental interaction model of screen reader assistive technology, where users press keyboard shortcuts to move through web content elements one at a time and listen to each element being announ…
- Pressure ulcer (Pressure injury, Pressure sore, Decubitus ulcer, Bedsore)
- A localized injury to the skin and underlying tissue resulting from sustained pressure, often over a bony prominence. Pressure ulcers are a major health concern for wheelchair users and people with li…
- Presumed Competence (Least Dangerous Assumption)
- The principle that all individuals should be assumed capable and intelligent regardless of whether their abilities are displayed in ways that conform to societal norms. Advocated particularly by nonsp…
- Preverbal Communication (Prelinguistic Communication)
- The stage of communication development before the consistent use of recognizable words, typically occurring in neurotypical children between birth and approximately 12 months of age. Preverbal communi…
- Primary Lateral Sclerosis (PLS)
- A rare progressive neurological disease affecting the upper motor neurons, causing weakness and stiffness in the voluntary muscles, particularly in the legs, arms, and tongue. Unlike amyotrophic later…
- Primary Progressive Aphasia (PPA)
- A neurodegenerative condition in which language abilities gradually deteriorate over time, in contrast to stroke-induced aphasia which occurs suddenly and may improve with therapy. Primary Progressive…
- Principal Component Analysis (PCA)
- A statistical technique that reduces the dimensionality of data by identifying the principal axes of variation in a dataset. In accessibility and assistive technology contexts, PCA is commonly used in…
- Print Disabilities (Print Disability, Print Impairment)
- A broad term encompassing any condition that prevents a person from effectively reading standard printed text. Print disabilities include blindness and low vision, but also extend to learning disabili…
- Print Disability (Print Impairment, Print-related Disability, Print-related Disabilities)
- A condition that prevents a person from effectively reading conventional printed material due to visual, physical, perceptual, developmental, cognitive, or learning disabilities. Print disabilities in…
- Print Disability (Print Impairment)
- A condition that prevents a person from effectively reading standard printed material. Print disabilities include blindness, low vision, dyslexia, and physical disabilities that make it difficult to h…
- Print Illiteracy (Alipi)
- A condition where a literate person is unable to meaningfully access or use written web content, not because they cannot read, but because the content is presented in a language, script, or format the…
- Printed Circuit Board (PCB)
- A printed circuit board (PCB) is a flat board, typically made of fibreglass-reinforced epoxy laminate with copper traces, that mechanically supports and electrically connects electronic components. PC…
- Prior Authorization (Pre-Authorization, Pre-Auth, PA)
- A requirement by health insurance companies that a healthcare provider obtain approval before a prescribed medication or treatment is covered. Prior authorization processes often involve multi-step bu…
- Prior Knowledge (Background Knowledge, Existing Knowledge)
- Information and experience a user brings to a technology interaction before it begins, including technical knowledge of how devices work, functional knowledge of task goals, strategic knowledge of pro…
- Privacy
- The right and practical ability of a person to control the collection, use, and disclosure of information about themselves, their body, their activities, and their relationships. For accessibility, pr…
- Privacy Alert (Privacy Notification, Privacy Warning)
- A notification informing users about the potential presence of private or sensitive content in their captured images or video. Privacy alerts aim to prompt users to apply obfuscation or take other pro…
- Privacy Enhancing Technology (PET, PETs)
- A category of tools, protocols, and practices designed to protect user privacy while using digital systems, including anonymising proxies, tracker blockers, end-to-end encryption, differential privacy…
- Privacy Leak (Accidental Disclosure, Privacy Disclosure)
- The unintentional capture and sharing of sensitive personal information through visual assistance technologies. Research has found that approximately 10% of images submitted to VAT services contain pr…
- Privacy Threat Model (Privacy Threat Analysis, Privacy Risk Assessment)
- A systematic process for identifying, classifying, and evaluating potential privacy risks that a technology system may pose to its users. Privacy threat modeling extends security-focused frameworks (l…
- Privacy by Default (Privacy by Design, Default Privacy Settings)
- Privacy by default is a design principle requiring that systems automatically protect user privacy without requiring users to take action. In accessibility contexts, this principle is particularly imp…