Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 218 of 333
- Perkins Brailler (Brailler, Braille Writer)
- A mechanical device for writing braille, manufactured by the Perkins School for the Blind since 1951. The Perkins Brailler has six keys corresponding to the six dots of a braille cell, a space bar, a …
- Perpetual Contact
- Perpetual contact is a sociological term coined by James Katz and Mark Aakhus to describe the state, enabled by mobile phones and later by ubiquitous internet messaging, in which people maintain const…
- Perplexity (Language Model Perplexity)
- A standard metric for evaluating language models that measures how well the model predicts a sample of text. Mathematically, perplexity is the inverse probability of the test set, normalised by the nu…
- Perseveration (Perseverative Behavior)
- The uncontrolled repetition of a response, word, phrase, or action that persists beyond the appropriate context. In people with cognitive impairments such as dementia, brain injury, or certain develop…
- Person-Centred Care (Person-Centered Care, Person-Centred Approach)
- An approach to care and support that places the individual — their preferences, needs, values, history, and identity — at the centre of all decisions and interactions, rather than focusing primarily o…
- Person-Centred Planning (Person-Centered Planning, PCP)
- A combination of approaches designed to empower people with disabilities to make their own choices and decisions about the support they receive. In accessibility contexts, person-centred planning shif…
- Person-First Language (People-First Language, PFL)
- Person-first language is a linguistic convention that places the person before the disability or condition, such as "person with a disability" or "person with autism," with the intent of emphasizing p…
- Person-Technology Match (PTM, Matching Person and Technology)
- A systematic approach to selecting assistive technology by evaluating the fit between a person's specific abilities, needs, preferences, and environment and the features and demands of available techn…
- Persona (User Persona, Design Persona)
- A fictional but research-based representation of a user group that captures key characteristics, goals, motivations, and needs. In accessibility work, personas are used to represent the diverse experi…
- Persona (User Persona, Design Persona)
- A fictional character created to represent a type of user who might interact with a product, service, or website. Personas are grounded in research data and typically include details such as name, age…
- Persona Design (Design Personas, User Personas)
- A user-centered design technique in which designers create fictional but grounded profiles of representative users — demographics, goals, context, pain points — to guide design decisions when direct u…
- Personal Assistant (Virtual Assistant, Digital Assistant, Voice Assistant, Smart Assistant)
- A software agent that can perform tasks or provide services based on user commands or queries, typically through voice interaction. Popular examples include Amazon Alexa, Google Assistant, Apple Siri,…
- Personal Care Assistant (PCA, Personal Care Attendant, Personal Support Worker, Care Aide)
- A person who provides hands-on assistance with activities of daily living (ADLs) to people with disabilities or older adults who need support with tasks such as bathing, dressing, toileting, grooming,…
- Personal Data Externalization (Data Externalization)
- The process of representing internal experiences — thoughts, emotions, behaviours, bodily states — in some external medium such as a drawing, written word list, spreadsheet, physical artefact, or trac…
- Personal Delivery Device (PDD, Delivery Robot, Autonomous Delivery Robot, Sidewalk Robot)
- Personal delivery devices (PDDs) are small autonomous or semi-autonomous robots that travel on sidewalks and pedestrian pathways to deliver food, packages, and other goods. These devices have been gra…
- Personal Digital Assistant (PDA, Handheld Computer, Pocket PC)
- A portable handheld computing device popular in the late 1990s and early 2000s that combined features like a calendar, contacts, note-taking, and basic application support in a pocket-sized form facto…
- Personal Independence Payment (PIP)
- A UK non-means-tested, points-based disability benefit for working-age adults that helps with the extra costs of long-term physical or mental health conditions. PIP has two components — Daily Living a…
- Personal Moderation (Self-Moderation, User-Controlled Moderation)
- Personal moderation refers to content moderation tools that allow individual users to control what content appears on their own feeds and experiences, as distinct from platform-level decisions that af…
- Personal Narrative (Storytelling, Conversational Narrative)
- The act of telling others about one's own experiences, events, and feelings — a fundamental aspect of human social interaction. Personal narrative serves multiple functions: building and maintaining r…
- Personal Needs and Preferences (PNP, Learner Preferences Profile, Access Needs Profile)
- Personal Needs and Preferences (PNP) is a component of the AccessForAll framework (standardized in ISO 24751 and IMS AccessForAll) that provides a structured way to describe an individual learner's ac…