Glossary

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SUMI(also: Software Usability Measurement Inventory)

A standardised questionnaire-based method for measuring software usability from the end user perspective. SUMI assesses five dimensions: efficiency, affect (user satisfaction), helpfulness, control, and learnability. In accessibility contexts, SUMI can be adapted alongside…

SUS(also: System Usability Scale)

Abbreviation for System Usability Scale, a ten-item questionnaire developed by John Brooke in 1986 that produces a single usability score from 0 to 100 based on user ratings of agreement with statements about a system. SUS is widely used in accessibility and HCI research because…

Social Acceptability(also: Social Acceptance, Technology Stigma)

The degree to which the use of an assistive technology or interaction technique is perceived as socially appropriate by both the user and those around them. Social acceptability is a critical but often underestimated factor in assistive technology adoption. Users may reject…

Social usability

The degree to which a technology supports positive social interactions and self-presentation for its users, particularly in contexts where technology use is visible to others. Social usability goes beyond functional task completion to consider whether using a product causes…

Speech Repair(also: Self-Correction, Speech Self-Repair, Command Correction)

Speech repair is the process of correcting or modifying a spoken utterance after it has been produced, either within the same turn or in a subsequent one. In natural conversation, speakers commonly interrupt themselves to fix errors, change wording, or update information using…

Summative Evaluation(also: Summative Usability Testing, Summative Assessment)

Usability evaluation conducted on functional software or high-fidelity prototypes, typically later in the development process, to measure the effectiveness of specific design choices. Summative testing uses representative users performing representative tasks and often involves…

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