Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 216 of 333
- Pedestrian dead reckoning (PDR, Inertial navigation, Step-and-heading)
- A localization technique that estimates a person's position by counting their steps (to determine distance) and detecting turns (to determine heading changes) from a known starting point, using inerti…
- Pediatric Rehabilitation (Children's Rehabilitation, Paediatric Rehabilitation)
- A specialized area of rehabilitation medicine focused on children and adolescents with disabilities, developmental delays, or injuries. Unlike adult rehabilitation which typically aims to restore lost…
- Peer Culture
- Peer culture is the body of shared understandings, values, social norms, communication practices, and play conventions that children co-construct among themselves through daily interaction - distinct …
- Peer Feedback (Peer Review, Peer Assessment)
- The process of learners observing and providing constructive feedback to each other during learning activities. In collaborative sign language learning, peer feedback enables real-time correction and …
- Peer Mentoring (Peer Support, Peer Tutoring)
- A support relationship where individuals with shared experiences provide guidance, emotional support, and practical assistance to one another, typically in informal or semi-structured settings. For AD…
- Peer Note-Taking Program (PNTP, Peer Note-Taker Program, Note-Taking Assistance Program)
- A disability support service offered by higher education institutions in which peer students (peer note-takers or PNTs) assist students with disabilities (SWDs) by transcribing lecture notes during cl…
- Peer Support (Peer-to-Peer Support, Peer Mentoring)
- A form of mutual assistance where people with shared experiences or conditions help each other by sharing knowledge, practical advice, and emotional support. In accessibility contexts, peer support co…
- Pelli-Robson Chart (Pelli-Robson Contrast Sensitivity Chart)
- The Pelli-Robson chart is a clinical tool used to measure contrast sensitivity — the ability to detect objects at low-to-moderate contrast levels. The chart consists of a series of letter-charts compo…
- Peltier Module (Peltier Device, Thermoelectric Module, TEC Module)
- A Peltier module is a thermoelectric device that creates a temperature difference when electrical current is applied, with one side heating up and the other cooling down. In assistive technology, flex…
- Pen Input (Stylus Input, Pen-Based Input)
- An input method using a pen or stylus to interact with a computing device, typically through direct manipulation on a touchscreen or digitizer. Pen input offers advantages for users with certain motor…
- Pen-based Interface (Stylus Interface, Pen Computing, Digital Pen Interface)
- A computer interaction method that uses a stylus or digital pen as the primary input device, typically in combination with a graphics tablet or touchscreen. Pen-based interfaces can support handwritin…
- People Who Stutter (PWS, Person Who Stutters, Adults Who Stutter, AWS, Children Who Stutter, CWS)
- An identity-first and community-preferred term for people who experience stuttering, a neurodevelopmental condition involving involuntary speech disfluencies such as blocks, prolongations, and repetit…
- People with Dementia (PwD)
- A person-first term used in accessibility and dementia research to refer to individuals living with dementia — an umbrella term covering progressive neurological conditions (such as Alzheimer's diseas…
- People with Severe Motor Disabilities (PSMD)
- A term used in assistive technology and human-robot interaction research to describe individuals whose motor impairments are severe enough that they cannot reliably use their hands or arms for everyda…
- Pepper (Pepper Robot)
- A 120 cm semi-humanoid social robot developed by SoftBank Robotics (originally with Aldebaran Robotics), featuring articulated arms with 20 degrees of freedom, LED eyes capable of gaze behaviours, an …
- Perceivability (Perceivable)
- The quality of information or interface elements being detectable through one or more senses — sight, hearing, or touch. Perceivability is the first principle of WCAG 2.0 and requires that information…
- Perceived Accessibility (Subjective Accessibility, Accessibility-in-Use)
- Perceived accessibility refers to the subjective quality by which users experience the accessibility of a website or application, as opposed to its objective compliance with accessibility standards. R…
- Perceived Urgency (Alert urgency, Urgency perception)
- The subjective sense of immediacy or threat conveyed by an alert, shaped by parameters such as pulse rate, inter-pulse interval, pitch, loudness, and — for tactile signals — vibration intensity and pa…
- Perception-Action Cycle (PAC)
- In human-computer interaction research, the perception-action cycle (PAC) describes the continuous loop in which a user perceives information from the environment — such as the position of an on-scree…
- Perceptual Analysis (Perceptual Judgment, Auditory-Perceptual Analysis)
- A method of evaluating speech, voice, or other sounds based on a human listener's subjective auditory impressions rather than instrumental measurement. In clinical speech-language pathology, perceptua…