Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 174 of 333
- Logical Metaphor (Spatial Metaphor)
- A design technique for haptic feedback where the physical location of a vibration on the body is mapped to correspond with a spatial or conceptual dimension of the information being conveyed. For exam…
- Logical Navigation (Structural Navigation, Semantic Navigation)
- A non-visual navigation strategy in which a user moves through a web page by its semantic structure — jumping between heading levels, ARIA landmarks, skip links, form fields, or other role-tagged regi…
- Logical Reading Order (Reading Sequence, Programmatic Reading Order)
- The sequence in which content within a document is presented to assistive technologies, which should match the intended logical flow of the content as a human reader would understand it. In PDFs, the …
- Logocentrism
- In captioning studies, the systematic prioritization of speech and spoken language over non-speech sounds in captioning practices and technologies. Logocentrism in captioning manifests as speech capti…
- Lombard Effect (Lombard Reflex, Lombard Response)
- The involuntary tendency of speakers to increase the intensity, duration, and fundamental frequency of their speech when communicating in noisy environments. Named after French otolaryngologist Étienn…
- Loneliness (Perceived Social Isolation)
- The subjective feeling of being alone or disconnected from others, regardless of the actual quantity of social contacts a person has. Loneliness differs from social isolation in that it reflects perce…
- Long Description (Extended Description, longdesc)
- A detailed textual description of an image or other non-text content that goes beyond the brief summary provided by alt text. Long descriptions are used for complex images such as charts, diagrams, in…
- Long Tail (Long-tail Distribution, Long-tail Participation)
- A statistical distribution in which a small number of items or participants account for the majority of the total, while a very long list of lower-frequency items collectively make up the remainder. T…
- Longdesc (Long Description, longdesc Attribute)
- An HTML attribute historically used to provide extended descriptions for images that require more detail than can fit in an alt attribute. The longdesc attribute contained a URL pointing to a separate…
- Longitudinal Study (Long-Term Study)
- A research method that involves repeated observations or measurements of the same subjects over an extended period of time. In accessibility and reading support research, longitudinal studies are impo…
- Look to Speak
- A free Android application developed by Google Creative Lab that enables people with speech and motor impairments to communicate by selecting images or pre-written phrases using eye movements detected…
- Lookout (Google Lookout)
- An Android accessibility application developed by Google that uses the smartphone camera and machine learning to identify objects, read text, scan documents, and describe surroundings for blind and pa…
- Loosely Coupled Interaction (Loosely Coupled Dual Interaction)
- An interaction architecture in which two or more user interfaces share the same underlying content and data but operate independently through separate, non-overlapping input and output modalities. In …
- Loss Aversion
- A cognitive bias in which people experience the pain of losing something more intensely than the pleasure of gaining something of equal value. In the context of technology accessibility and aging, los…
- Loss of Obscurity (Loss of anonymity)
- A concept introduced by Thomas J. Carroll in his 1961 book "Blindness: What It Is, What It Does, and How to Live with It," in which he identified twenty distinct losses that accompany the onset of bli…
- Lost Generation
- In ADHD and autism discourse, the term refers to adults — particularly women, minority genders, and people of colour — who went undiagnosed as children due to gendered diagnostic criteria, systemic me…
- Loudness Recruitment (Recruitment, Hyperacusis-like Recruitment)
- Loudness recruitment is a common consequence of sensorineural hearing loss in which the range between 'just audible' and 'uncomfortably loud' sounds is compressed — quiet sounds are harder to hear, bu…
- Low Bandwidth Input (Limited Input, Reduced Bandwidth Input)
- A category of human-computer interaction where the user can only produce a very small number of distinct signals — typically one to four — when communicating with a computer. Low bandwidth input chara…
- Low Literacy (Limited Literacy, Functional Illiteracy)
- A level of reading and writing ability that is below what is typically needed to function effectively in everyday situations requiring text comprehension. Low literacy may result from limited educatio…
- Low Vision (Partial Sight, Visual Impairment)
- A visual condition in which a person has significant vision loss that cannot be fully corrected with glasses, contact lenses, medication, or surgery, but retains some usable vision. People with low vi…