Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 120 of 333
- Family-based Care (Family Caregiving Model, Home-based Care)
- Family-based care is the model in which a relative — most often a parent, spouse, adult child, or sibling — is the primary caregiver for a disabled, chronically ill, or ageing family member, typically…
- Farnsworth D-15 Test (D-15 Color Test, Farnsworth Dichotomous Test)
- The Farnsworth D-15 test is a clinical assessment used to evaluate color perception by asking a person to arrange 15 colored caps in order of hue. The pattern of errors reveals the type and severity o…
- Fat Finger Problem (Fat Finger Effect, Finger Occlusion)
- A fundamental challenge in touchscreen interaction where the user's finger is larger than the target being selected, causing difficulty in precise target acquisition. The finger both occludes (blocks …
- Fatigue (Disability-Related Fatigue, Physical Fatigue)
- A common symptom across many disabilities and chronic conditions characterized by persistent exhaustion that is disproportionate to activity level and not fully relieved by rest. In technology and VR …
- Feasibility Study (Feasibility Trial, Pilot Study)
- A feasibility study is a small-scale investigation conducted before a full-scale trial to determine whether a planned intervention or system can be delivered as intended in its real-world setting. Fea…
- Feature Extraction (Feature Engineering, Representation Learning)
- Feature extraction is the process of identifying and isolating measurable properties or characteristics (features) from raw data such as images, audio, or text, for use in machine learning tasks. In i…
- Feature Hashing (Hashing Trick)
- A technique used in machine learning to convert text or categorical data into fixed-length numerical feature vectors by applying a hash function. Feature hashing is particularly useful for handling hi…
- Federated Learning (FL)
- A machine-learning approach in which a shared model is trained across many user devices without the raw training data ever leaving those devices: each device computes updates locally and sends only mo…
- Feedback Design (System Feedback, User Feedback Design)
- The design of system responses that communicate to users what is happening, what the system understood, and what actions are needed. Effective feedback design is critical in assistive technology, wher…
- Feedforward (Anticipatory Feedback)
- Design information that tells users what to expect before they take an action, guiding them toward intended functionality by communicating expected results. Unlike feedback (which confirms what happen…
- Feminist HCI
- An approach to human-computer interaction research and design articulated by Shaowen Bardzell that brings feminist theory, values, and methods into HCI practice. Feminist HCI foregrounds pluralism, em…
- Fetal Alcohol Spectrum Disorder (FASD, Fetal Alcohol Syndrome, FAS)
- A group of conditions that can occur in a person whose mother consumed alcohol during pregnancy. Effects can include physical, behavioral, and learning problems, with a wide range of severity. FASD is…
- Few-Shot Learning (N-Shot Learning, Low-Shot Learning)
- Few-shot learning is a machine learning approach that enables AI models to learn new concepts from only a small number of examples — typically 1 to 10 — rather than the hundreds or thousands tradition…
- Few-Shot Object Recognition (Few-Shot Recognition)
- A machine learning approach in which a model learns to identify a novel object from only a handful of labelled examples (commonly one to ten) rather than the hundreds or thousands typical of conventio…
- Few-Shot Prompting (In-Context Learning, Few-Shot Learning)
- A technique for guiding large language models by providing a small number of examples within the input prompt to demonstrate the desired task or output format. In accessibility applications, few-shot …
- Fiber Arts (Textile Arts, Textile Crafts)
- Creative practices involving the manipulation of fibers or textiles, including weaving, knitting, crocheting, embroidery, quilting, and felting. Fiber arts are increasingly explored in accessibility r…
- Fibromyalgia (FM, Fibromyalgia syndrome)
- Fibromyalgia is a chronic condition characterized by widespread musculoskeletal pain, fatigue, sleep disturbances, and cognitive difficulties often called "fibro fog." It affects approximately 2-4% of…
- Fidelity
- An expression of how accurately a representation reproduces its source. A photograph is a high-fidelity visual representation of a scene but loses depth, sound, and smell. In accessibility and content…
- Fidgeting (Stimming, Self-stimulatory behaviour)
- Repetitive body movements or object manipulation — such as tapping, spinning, clicking, or squeezing — that serve self-regulatory functions including maintaining focus, managing stress, regulating ene…
- Fiducial Marker (ArUco Marker, Fiducial Tag)
- A visual pattern placed on an object or surface that can be detected and identified by computer vision systems to determine the object's position, orientation, and identity. Fiducial markers such as A…