What does UI stand for?
AnswerUser interface
UI means user interface: the screens, buttons and controls people interact with.
Tech · Facts & stats
UX facts & stats
7 fact-checked facts about user experience design, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is a persona in UX design?
AnswerA fictional profile representing a key type of user
Personas summarize research about real users into a representative character that guides design decisions.
Going deeper
What does Fitts's law predict?
AnswerTime to reach a target depends on its size and distance
Fitts's law says larger and closer targets are faster to point at, which is why key buttons are made big.
What does WCAG stand for?
AnswerWeb Content Accessibility Guidelines
WCAG are the W3C's guidelines for making web content accessible to people with disabilities.
What is an A/B test?
AnswerComparing two versions to see which performs better
In an A/B test, users are split between two versions so their results can be compared.
Expert level
Under WCAG level AA, what is the minimum contrast ratio for normal-size body text?
Answer4.5:1
WCAG AA requires at least 4.5:1 contrast for normal text; 7:1 is the stricter AAA level.
What does a card sorting exercise help UX designers understand?
AnswerHow users group and label information
In card sorting, participants organize topics into groups, revealing how to structure menus and navigation.
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