Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 224 of 333
- Point Cloud
- A set of data points in three-dimensional space, where each point represents a position on the surface of an object or environment, typically captured by depth cameras, LiDAR scanners, or photogrammet…
- Point Spread Function (PSF)
- A mathematical description of how a single point of light is spread or blurred by an optical system such as the human eye. The point spread function characterizes the degree and pattern of distortion …
- Point of Infrastructuring (PoI)
- A concept from Pipek and Wulf's infrastructuring theory naming the moment at which users become aware of the technology they depend on - typically when it breaks, behaves unexpectedly, or no longer su…
- Point of Interest (POI)
- A point of interest (POI) is a specific location or feature in a physical environment that is relevant to a user's navigation or understanding of their surroundings. In accessible wayfinding systems f…
- Point-and-Click (Point and Click, Click Target)
- A fundamental interaction paradigm in graphical user interfaces where the user moves a cursor to a target on screen and activates it by pressing a button on a pointing device such as a mouse or trackp…
- Point-of-Gaze (POG, Gaze Point, Point of Regard)
- Point-of-gaze is the location on a display, scene, or object at which a user's eye is currently fixating, typically reported by an eye tracker as a stream of (x, y) screen coordinates sampled at rates…
- Point-of-Interest Techniques (POI Techniques)
- Interaction methods in VR that allow users to select and navigate to specific points of interest in the virtual environment, designed to be accessible for people with limited mobility. These technique…
- Pointer Speed (Mouse Gain, Cursor Speed, Mouse Speed, Pointer Acceleration)
- An operating system setting that controls how far the cursor moves on screen relative to physical movement of the mouse or pointing device. Higher pointer speed (gain) means less physical movement is …
- Pointing (Pointing Performance, Mouse Pointing, Cursor Pointing)
- The act of moving a cursor or pointer to indicate a specific location on screen, typically to select, activate, or interact with an interface element. Pointing is a fundamental computer interaction th…
- 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…
- Pointing Task (Target Acquisition Task, Fitts' Task)
- A fundamental human-computer interaction task in which users move a cursor (via mouse, touchpad, finger, or other input device) to click or tap on a target. Pointing tasks are governed by Fitts' Law, …
- Points of interest (POI, Landmarks)
- Specific locations in the environment that are useful or relevant to a user, such as shops, restaurants, transit stops, public buildings, and other named places. In accessible navigation for people wi…
- Pointwise Mutual Information (PMI)
- A statistical measure used in natural language processing to quantify the strength of association between two words based on how much more frequently they co-occur in a corpus than would be expected b…
- Polar Motion Profile (PMP)
- A Polar Motion Profile (PMP) is a computational technique used in sign language detection that models the quantity and distribution of motion relative to a detected face using polar coordinates. The m…
- Political/Relational Model of Disability (Relational Model of Disability)
- A model of disability described by Alison Kafer that situates disability within sociopolitical systems, emphasizing how structures of power and interactions between people construct the experience of …
- Polyphonic (Polyphony)
- In music, the simultaneous combination of two or more independent melodic lines or voices. Polyphonic music is notated on multiple staves that must be read together, presenting a particular challenge …
- Polysemy (Polysemous Words)
- The property of a word having multiple related meanings or senses. For example, the word "bank" can refer to a financial institution or the edge of a river. Polysemy creates particular challenges for …
- Pomodoro Technique (Pomodoro Method, Pomodoro Timer)
- A time management method developed by Francesco Cirillo in the late 1980s that uses a timer to break work into focused intervals (typically 25 minutes) separated by short breaks (typically 5 minutes),…
- Pop-on Captions (Pop-on style, Block captions)
- A captioning display style in which a complete caption appears on screen as a single block, remains visible for a readable duration, and is then replaced in one transition by the next block. Pop-on ca…