Glossary

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N-back Task(also: N-back, 2-back Task)

A working-memory paradigm in which participants view or hear a sequence of stimuli (letters, digits, positions) and, on each trial, respond when the current stimulus matches the one presented N steps earlier. Higher N levels place greater load on working memory and executive…

NASA Task Load Index(also: NASA-TLX, Task Load Index)

A widely used subjective workload assessment tool developed by NASA that measures perceived workload across six dimensions: mental demand, physical demand, temporal demand, performance, effort, and frustration. Participants rate each dimension on a scale, providing a…

NASA Task Load Index(also: NASA-TLX, TLX)

A widely used subjective workload assessment tool developed by NASA that measures perceived workload across six dimensions: mental demand, physical demand, temporal demand, performance, effort, and frustration. In accessibility research, NASA-TLX is frequently employed to…

NASA-TLX(also: NASA Task Load Index, Task Load Index, NASA TLX)

A widely used subjective workload assessment tool developed by NASA that measures perceived workload across six dimensions: mental demand, physical demand, temporal demand, performance, effort, and frustration. In accessibility research, NASA-TLX is frequently used to evaluate…

Narrative-Flip Method(also: Narrative flip)

A qualitative HCI research method in which participants first encounter a technology or artifact without knowing its origins or intent, reflect on it, and only afterwards are told its disability-led, activist, or political context. The deliberate before/after framing surfaces…

Native Signer(also: Native Sign Language User, L1 Signer)

A person who acquired a sign language as their first language (L1) during the critical period of language development, typically before age 5. Native signers usually learned sign language from deaf parents or through early immersion in deaf education environments. In…

Need-Finding Interview(also: Need-Finding Study, Needs Assessment Interview)

A qualitative research method conducted early in the design process to understand users' current practices, challenges, unmet needs, and desires for future solutions. Need-finding interviews typically use open-ended questions and semi-structured formats to elicit rich…

Networked Minds Social Presence Inventory(also: Networked Minds Measure of Social Presence, NMSPI)

The Networked Minds Social Presence Inventory is a self-report questionnaire developed by Biocca, Harms and colleagues to measure social presence - the sense of 'being together' with another person - in mediated environments such as video calls, virtual reality or augmented…

Non-Use(also: Technology Non-Use, Technology Refusal)

A research tradition in HCI that takes seriously the choice not to use a technology — treating refusal, abandonment, and selective engagement as meaningful, reasoned behaviour rather than as failure. Non-use scholarship (Wyatt, Baumer, Satchell & Dourish, Waycott and colleagues)…

Normal-Hearing Listener(also: NH Listener, Normal Hearing)

A research term for a participant whose audiometric thresholds fall within the clinical normal range (typically pure-tone thresholds of 25 dB HL or better across speech frequencies), used as a comparison group in hearing-accessibility studies. Normal-hearing (NH) listeners are…

Novelty Effect(also: Novelty bias)

A research-methodology concept describing the tendency for users to behave differently with a new technology simply because it is new, rather than because of its enduring value. Novelty effects inflate short-term engagement, enthusiasm, and usage, then fade as the technology…

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