UX Glossary
URL
Usability
Usability analyst
Usability metric
Usability team
Usability testing
UsabilityNet
Use Experience (UE, UX)
User research
User Types
User-Centered Design (UCD)
Terms starting with letter U
Usability metric
A number expressing the degree or strength of a usability characteristic, possessing metric properties, obtained by objective counting rules, and with known reliability and validity. Usability metrics have known maxima and minima, their scale of measurement is known, they possess scale metric properties, they are gathered by objectively verifiable rules of counting, and they have demonstrated reliability and validity. They are said to instantiate or operationalise a characteristic of usability. They must be interpreted according to the context in which they were measured.
usabiliTEST.com/glossary/usability-metric
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