Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 142 of 333
- Hearable (Smart Earbud, Smart Earphone)
- A class of in-ear or over-ear wearable devices that combine audio playback with one or more sensors and on-device computing - microphones for ambient audio capture, inertial sensors, biosensors, and m…
- Hearcon (3D Earcon)
- An extension of the earcon concept that adds three-dimensional spatial audio properties to non-speech audio cues used in computer interfaces. While earcons are abstract synthesized sounds that represe…
- Hearing Aid (Hearing Aids)
- An electronic device worn in or behind the ear that amplifies sound to assist people with hearing loss. Modern hearing aids include digital signal processing, directional microphones, and connectivity…
- Hearing Aid (HA, BTE, Behind-the-Ear)
- An electronic device worn in or behind the ear that amplifies sound for individuals with hearing loss. Modern hearing aids include features such as Bluetooth connectivity, directional microphones, and…
- Hearing Aid Compatibility (HAC, HAC Rating)
- Federal Communications Commission (FCC) requirements and ratings for telephones to work effectively with hearing aids and cochlear implants. HAC standards address acoustic coupling (how well the phone…
- Hearing Impairment (Hearing Loss, Hard of Hearing)
- A partial or total inability to hear sounds in one or both ears, ranging from mild to profound. Hearing impairment can be congenital or acquired, and may worsen with age (presbycusis). In digital acce…
- Hearing Loss (Hearing Impairment, Hard of Hearing, Deafness)
- A partial or total inability to hear sounds, ranging from mild hearing loss to profound deafness. Hearing loss can be congenital or acquired, and becomes increasingly common with age, affecting approx…
- Hearing loss (Hearing impairment, Hard of hearing, Deafness spectrum)
- A reduction in the ability to perceive sounds, occurring on a spectrum from mild (difficulty hearing soft sounds or speech in noisy environments) through moderate and severe to profound (inability to …
- Heart Rate Variability (HRV)
- The variation in time intervals between consecutive heartbeats, reflecting the balance between sympathetic (stress response) and parasympathetic (rest and recovery) branches of the autonomic nervous s…
- Heat Map (Heatmap, Attention Map, Gaze Map)
- A data visualization technique that uses colour intensity to represent the distribution and density of user attention or interaction on a page or interface. In eye tracking research, heat maps aggrega…
- Heavy Disguise
- A research-ethics technique introduced by Amy Bruckman (2002) for handling quotes and user-generated content drawn from public online spaces. Under heavy disguise the researcher rephrases quotations, …
- Height-Field Surface (Surface plot, Heightfield plot, 2.5D surface)
- A type of 3D data visualisation in which a scalar value (for example, elevation, intensity, pressure, or probability) is plotted over a two-dimensional domain, producing a continuous surface that can …
- Heisenberg Effect (Heisenberg Problem)
- In human-computer interaction, a spatial interaction problem where the act of making a selection disrupts the positional accuracy of the cursor or pointer. In virtual reality freehand gesture contexts…
- Help America Vote Act (HAVA)
- The Help America Vote Act (HAVA) is a United States federal law enacted in 2002 in response to the voting irregularities of the 2000 Presidential Election. HAVA established mandatory minimum standards…
- Help-Seeking (Help seeking behavior)
- The deliberate process of asking for, searching for, or otherwise obtaining assistance to complete a task, learn a feature, or resolve a breakdown. In accessibility contexts, help-seeking is often sha…
- Hemi-Attention (Hemispatial Neglect, Unilateral Neglect, Visual Neglect, {'': ['Visuo-Spatial Neglect', 'Visuospatial Neglect', 'VSN']})
- A neurological condition in which a person has reduced attention or awareness to one side of space, typically the side opposite to a brain injury. Unlike hemianopsia (where visual input is lost), hemi…
- Hemianopsia (Hemianopia, Half-Field Vision Loss)
- Loss of vision in one half of the visual field in one or both eyes, typically caused by damage to the brain's visual pathways rather than the eyes themselves. The most common form is homonymous hemian…
- Hemiparesis (Hemiplegia, One-Sided Weakness)
- Weakness or partial paralysis affecting one side of the body, commonly resulting from stroke, traumatic brain injury, or neurological conditions. Hemiparesis affects motor control, coordination, and s…
- Hemiplegia (Hemiparesis)
- A condition involving paralysis or severe weakness on one side of the body, most commonly resulting from stroke but also caused by traumatic brain injury, cerebral palsy, or other neurological conditi…
- Hemiplegia (Hemiparesis)
- Paralysis or severe weakness affecting one side of the body, typically caused by stroke, cerebral palsy, or brain injury. Hemiplegia commonly affects the arm, leg, and sometimes face on either the lef…