metrics

Metrics quiz

Test your grip on metrics in UX. Read each definition and name the term; this quiz leads with the metrics entries and rounds out with a few from across the glossary. Every question comes from the live entries, so it grows as the glossary does.

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The quiz needs JavaScript to keep score. You can still browse every entry and try the demos - each one teaches its term by letting you do it.

Revise the metrics terms first

The metrics entries in the glossary, in brief. Open any one for the interactive demo behind it.

Time on task: Time on task is how long it takes someone to complete a specific task, from start to finish. It's the most common efficiency metric in usability testing - and one of the easiest to misread.
Conversion rate: Conversion rate is the share of people who complete a goal - buy, sign up, subscribe - out of everyone who could have. It's usually quoted end to end, but it's really the product of every step's survival rate along the way.
Task success rate: Task success rate is the share of people who finish a task - four of five users complete it, so 80%. It is the most basic measure of whether a thing works at all, and the easiest to read too much into.
Net promoter score: Net promoter score asks one question - "how likely are you to recommend us?" on a 0 to 10 scale - then subtracts the share of detractors (0 to 6) from the share of promoters (9 to 10). The 7s and 8s sit in the middle as a neutral zero. The result runs from -100 to +100.
CSAT (customer satisfaction score): CSAT - customer satisfaction score - asks people to rate their satisfaction, usually on a short scale, right after an experience, and reports the percentage who answered positively (typically the top one or two ratings). It's a quick, intuitive read on "did that go well?" for a specific interaction - a purchase, a support chat, a feature.
Customer effort score (CES): Customer effort score (CES) asks one thing after an interaction: how easy was it to get what you needed? Usually a single agree-scale statement ("the company made it easy to handle my issue"), it shifts the question from "are you delighted?" to "did we get out of your way?" - on the theory that reducing effort keeps people more reliably than trying to wow them.
Bounce rate: Bounce rate is the share of visits where someone lands on a page and leaves without any further interaction - one page, no second click. It's easy to measure and easy to misread: a high bounce rate can mean people couldn't find what they wanted, or that they found it instantly and left satisfied. The number means nothing until you know what the page was for.
Error rate: Error rate is how often people make errors while doing a task - mistakes per attempt, or the share of attempts that go wrong. It's a usability metric, not a verdict on users: a high error rate almost always points at a confusing design, not careless people, and the type of error tells you what kind of fix it needs.
HEART framework: HEART is Google's framework for measuring user experience across five dimensions - Happiness, Engagement, Adoption, Retention and Task success - so you capture quality of experience, not just business output. Its real engine is the "Goals-Signals-Metrics" process that turns each fuzzy dimension into a concrete number, forcing you to decide what success means before you pick what to count.
System usability scale: The system usability scale is a short questionnaire with ten statements rated from strongly disagree to strongly agree. It converts how usable something feels into a single score from 0 to 100. It’s quick, standardised, and surprisingly comparable across very different products.