Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Haptic Experience Model(also: HX Model, HX)
- A framework proposed by Kim and Schneider for evaluating user experience with haptic technologies along five perceptual-experiential dimensions: autotelics (the pleasantness of the sensation), realism (fidelity to the depicted phenomenon), harmony (fit with accompanying…
- Heat Map(also: 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 aggregate fixation data from multiple users, with warmer colours (red, orange)…
- 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, omits usernames and platform identifiers, and verifies (e.g., via search) that…
- Hierarchical Task Analysis(also: HTA)
- A structured method for describing and analyzing tasks by breaking them down into goals, sub-goals, and operations in a hierarchical tree structure. Originally developed for industrial and safety-critical domains, HTA has been adopted in accessibility research to identify where…
- Hornbostel-Sachs Classification(also: Hornbostel-Sachs System, Sachs-Hornbostel)
- A comprehensive system for classifying musical instruments based on how they produce sound, originally developed by Erich von Hornbostel and Curt Sachs in 1914. The system divides instruments into four main categories: idiophones (sound from the vibration of the entire…
- Human Computation(also: Crowdsourced Computing)
- A computational approach that harnesses human intelligence to perform tasks that computers cannot easily accomplish alone. In accessibility contexts, human computation powers services like remote sighted assistance for blind users, crowd-powered captioning to improve ASR…
- Human Failure Modes and Effects Analysis(also: HFMEA, Human FMEA)
- An adaptation of Failure Modes and Effects Analysis (FMEA) that focuses specifically on human performance and error. HFMEA systematically examines each step in a process to identify how humans might fail, why they might fail, and what effects those failures would have. In…
- Human-Centered Threat Modeling
- A methodology borrowed from security and privacy research that identifies the people and institutions who intend to cause harm to a specific population, the threats they pose, and the defensive strategies the population uses. In accessibility research, human-centered threat…
- Human-computer interaction(also: HCI, Human-machine interaction)
- The interdisciplinary study of the design, evaluation, and use of interactive computing systems by humans, drawing on computer science, psychology, design, and social science. HCI research encompasses how people use technology, how interfaces should be designed for usability and…
- Human-in-the-Loop(also: HITL)
- An approach to AI system design and evaluation that incorporates human judgment, feedback, and oversight at critical points in automated processes. In accessibility contexts, human-in-the-loop methodologies involve people with disabilities and other affected communities in…
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