Glossary

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UEQ-S(also: User Experience Questionnaire - Short, Short UEQ)

UEQ-S is an eight-item short version of the User Experience Questionnaire, a standardised survey instrument that measures subjective user experience on a 7-point semantic-differential scale. It captures two broad factors: pragmatic quality (supportive, easy, efficient, clear)…

Upper Baseline(also: Gold Standard, Reference Standard)

In accessibility evaluation research, an upper baseline is a high-quality reference stimulus used to establish the best achievable performance against which other systems are compared. For sign language animation studies, this might be a video of a human signer or a carefully…

Usability Study(also: Usability Test, Usability Evaluation)

A research method that evaluates how easily and effectively users can interact with a product, system, or prototype by observing real users performing tasks. Usability studies measure factors such as task completion rate, error frequency, time on task, and subjective…

Usability Testing(also: Usability Evaluation, User Testing)

A research method in which representative users attempt realistic tasks with a product or prototype while researchers observe and collect data on effectiveness, efficiency, and satisfaction. In accessibility contexts, usability testing with people with disabilities is essential…

User Elicitation(also: Elicitation study, Gesture elicitation study, User-defined gestures)

A participatory user-research method, widely used in gesture and interaction design, in which end users or domain experts are shown a desired system effect (a "referent" such as "rotate this object") and asked to propose the input action they believe should trigger it.…

User Enactment(also: UE, Experience Prototyping)

A research method in which participants explore emerging or future technologies through simulated scenarios using physical enactment stages (mockup environments). User enactment combines brainstorming, where participants speak aloud their thoughts and decisions, with…

User Engagement Scale(also: UES, UES-SF)

A validated self-report questionnaire for measuring user engagement with digital systems across dimensions including focused attention, perceived usability, aesthetic appeal, and reward. Developed by O'Brien and Toms and later shortened to the 12-item UES Short Form (UES-SF),…

User Experience Questionnaire(also: UEQ, UEQ-S, Short UEQ)

A standardised self-report instrument, developed by Schrepp and colleagues, that captures a user's subjective impression of a product across dimensions such as attractiveness, efficiency, perspicuity, dependability, stimulation, and novelty via pairs of contrasting adjectives…

User Participation(also: User Involvement, Participatory Research, Co-production)

The active involvement of end users in the design, development, and evaluation of products, services, or systems that affect them. In accessibility contexts, user participation means including people with disabilities not just as test subjects but as collaborators who contribute…

User persona(also: Persona, Design persona)

A fictional but research-based representation of a user archetype that captures key characteristics, goals, behaviours, and pain points of a segment of the target audience. In accessibility design, personas representing disabled users help development teams move beyond…

User-Sensitive Inclusive Design(also: USID)

A design methodology that adapts user-centered design principles for contexts where the target user population is highly diverse and where individual differences — including those related to disability — are significant design factors. Unlike Universal Design which aims for…

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