Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 169 of 333
- Learning Management System (LMS)
- A software platform used to create, deliver, manage, and track educational content and learning activities. Common examples include Blackboard, Moodle, Canvas, and Google Classroom. In the context of …
- Learning Object (LO, Reusable Learning Object, RLO)
- A self-contained, reusable unit of educational content that can be independently accessed, combined with other learning objects, and delivered across different learning management systems. Learning ob…
- Learning Object Metadata (LOM, IEEE LOM)
- A data model used to describe learning resources, standardized by IEEE (IEEE 1484.12.1). Learning Object Metadata defines a set of elements organized into categories including general, lifecycle, tech…
- Learning Vector Quantization (LVQ)
- A supervised machine learning algorithm used for pattern classification, commonly applied in brain-computer interface systems to classify EEG signals. LVQ works by creating a set of reference vectors …
- Learning by Doing (Incidental Learning, Learning-While-Doing)
- Learning by doing is a pedagogical and interface design principle in which skills are acquired through the process of performing tasks rather than through separate, explicit instruction. In human-comp…
- Leber Hereditary Optic Neuropathy (LHON)
- A maternally inherited genetic condition that causes sudden or rapid loss of central vision, typically affecting young adults between the ages of 15 and 35. LHON results from mutations in mitochondria…
- Lecture Accessibility (Accessible Lectures, Accessible Educational Media)
- The practice of designing and delivering lectures and associated educational materials so that they are usable by students with disabilities, including those who are blind, have low vision, are deaf, …
- Lecture Captioning (Classroom Captioning, Lecture Transcription)
- The real-time or post-production conversion of spoken lecture content into text, displayed to students during or after a class session. Lecture captioning can be performed by human captioners (such as…
- Lecture Capture (Lecture Recording, Classroom Recording)
- The process of recording classroom lectures, presentations, or educational sessions using video, audio, and screen capture technology for later review by students. Lecture capture systems range from s…
- Lee Silverman Voice Treatment (LSVT, LSVT LOUD)
- An evidence-based speech therapy programme originally developed for individuals with Parkinson's disease that focuses on increasing vocal loudness as the primary mechanism for improving overall speech…
- Legal Blindness (Legally Blind)
- A level of vision loss defined in many countries as visual acuity of 20/200 or less in the better eye with best correction, or a visual field of 20 degrees or less. Legal blindness does not necessaril…
- Legal blindness (Legally blind)
- A level of visual impairment defined in many jurisdictions as visual acuity of 20/200 or worse in the better eye with best correction, or a visual field of 20 degrees or less. Legal blindness is an ad…
- Legally Blind (Legal Blindness)
- A legal classification of visual impairment used to determine eligibility for government benefits, rehabilitation services, and disability accommodations. In the United States, legal blindness is defi…
- Legibility
- The visual clarity with which individual characters, words, and blocks of text can be distinguished and recognised. Legibility is influenced by font choice (sans-serif fonts are generally more legible…
- Legion:Scribe (Scribe, Legion Scribe)
- A crowd captioning system developed at the University of Rochester that enables multiple non-expert typists to collectively produce real-time captions by simultaneously typing partial transcriptions o…
- Legitimate Peripheral Participation (LPP)
- A concept from Jean Lave and Etienne Wenger's situated-learning theory describing how newcomers join a community of practice by first participating in peripheral, lower-stakes activities and gradually…
- Letter Reversal (Mirror Writing, Character Reversal)
- A reading or writing difficulty where visually similar letters are confused or substituted for one another, such as swapping b for d, or p for q. Letter reversal is commonly associated with dyslexia a…
- Leukodystrophy (Leukodystrophies)
- Leukodystrophy is a group of rare, progressive, metabolic, genetic diseases that affect the brain, spinal cord, and peripheral nerves by damaging the white matter (myelin sheath) that insulates nerve …
- Level of Detail (LOD)
- A technique in computer graphics and information design where the amount of detail presented varies based on context, typically distance or user interaction. In 3-D environments, objects farther from …
- Levenshtein Distance (Edit Distance)
- A metric that measures the minimum number of single-character edits (insertions, deletions, and substitutions) needed to transform one string into another. In accessibility research, Levenshtein dista…