Glossary
Searchable terminology from accessibility, web standards, and related fields.
899 results found in Assistive Technology.
- Pointing Device (Pointer Device, Input Device)
- Any hardware device used to control the movement of a cursor or pointer on a computer screen, enabling users to select, click, drag, and interact with interface elements. Common pointing devices inclu…
- Pointing Device Gain (Control-Display Gain, Mouse Sensitivity, Pointer Speed, CD Gain)
- The ratio between the movement of a physical input device (such as a mouse or trackball) and the resulting movement of the cursor on screen, typically measured in pixels per inch of device movement. H…
- Pose estimation (Body pose estimation, Human pose estimation)
- The computational process of determining the position and orientation of a person's body joints and limbs from sensor data such as cameras, depth sensors, or inertial measurement units. In accessibili…
- Postural Support (Seating Support, Positioning Support)
- Equipment and strategies that help maintain a person's body in a stable, functional position for activities including communication, eating, and using assistive technology. Adequate postural support i…
- Posture Detection (Posture Monitoring, Posture Recognition)
- The use of sensors or computer vision to identify and monitor a person's body posture in real time. In assistive technology, posture detection systems can use accelerometers, gyroscopes, or cameras to…
- Power Assist Device (Power assist wheel, Pushrim-activated power-assisted wheelchair, PAPAW)
- A motorized attachment that adds electric propulsion assistance to a manual wheelchair without converting it into a full power wheelchair. Power assist devices typically attach to the wheelchair frame…
- Power Cards
- Power Cards are a visual teaching strategy developed by Elisa Gagnon for autistic learners and others with social-communication differences. A Power Card is a small, portable card that pairs a brief s…
- Power-Assist Add-On (Power Assist, Power-Assist Device, Wheelchair Power Assist)
- A power-assist add-on is a retrofit device attached to a manual wheelchair that provides motorized propulsion while preserving the chair's manual structure, offering a middle ground between manual and…
- Powered Wheelchair (Electric Wheelchair, Motorized Wheelchair, Power Chair)
- A wheelchair propelled by an electric motor and battery system rather than manual effort, typically controlled via a joystick or alternative input device. Powered wheelchairs are essential mobility ai…
- Pre-compensation (Display Pre-compensation, Image Pre-compensation)
- A technique in which images displayed on a computer screen are mathematically modified in advance to counteract the visual aberrations of the viewer's eye. Rather than relying on corrective lenses or …
- 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…
- 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…
- 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…
- Product Identification (Product Recognition)
- The task of determining what a packaged or unpackaged product is from visual (or other sensory) input, at a level of detail useful to an end user: generic type (soup, cereal, shampoo), brand (Campbell…
- Prompting System (Prompting Device, Task Prompting Technology)
- An assistive technology that provides stepwise guidance through text, images, audio, or video instructions to help individuals complete multi-step tasks such as cooking, personal hygiene, or workplace…
- Prosthesis (Prosthetic, Prosthetic Device, Artificial Limb)
- A prosthesis is an artificial device that replaces a missing body part, which may be lost through congenital conditions, injury, or disease. Prostheses range from purely cosmetic devices designed to r…
- Prosthetics (Prostheses, Prosthetic Devices, Artificial Limbs)
- Artificial devices designed to replace missing body parts, most commonly limbs lost through amputation, congenital absence, or trauma. Modern prosthetics range from basic cosmetic devices to highly fu…
- Public Digital Terminal (PDT, Self-Service Terminal, Self-Service Kiosk)
- A publicly available interactive electronic device that provides services or information to users, such as ATMs, ticket vending machines, check-in kiosks, and information points. Public digital termin…
- Pull Notification (On-Demand Notification, User-Initiated Notification)
- A notification or information delivery model where content is provided only when explicitly requested by the user, in contrast to push notifications which are delivered automatically. In assistive nav…