Usability, Customer Experience & Statistics

Upcoming Events

Chicago, IL

Quantifying the User Experience: Chicago

Chicago: July 15th

Half-Day talk on Quantifying the User Experience, including : essential of UX metrics and methods; and 6 best practices for using numbers to inform design[Read More]

Denver, CO

UX Boot Camp: Denver

Denver: Aug 17-19 2016

3 Days of Hands-On Training on UX Methods, Metrics and Analysis. Participants receive a User Experience Research Certificate and 2.5 Continuing Education Credits from the University of Denver. [Read More]

Recent Content


Essential Excel Skills For Researchers Part 1

Essential Excel Skills For Researchers Part 1

Jeff Sauro • June 21, 2016

Excel is a powerful program. It's like an onion, peeling back layers to reveal increasingly specialized functions. It can take years to master. But after you get beyond the basic idea of the spreadsheet and simple formulas, you should master the following functions and techniques that make data analysis more efficient and powerful. Part 1 of 2.[Read More]


5 Common Mistakes in UX Benchmark Studies

5 Common Mistakes in UX Benchmark Studies

Jeff Sauro • June 14, 2016

A lot goes into a benchmarking study, and any of those things can go wrong. It's important to get the details right because you'll use the benchmarks to make comparisons over time and the wrong decisions can have an impact that last for years.Here are five of the more common mistakes made when conducting benchmark studies and what you can do to prevent them.[Read More]


How to Assign the Severity of Usability Problems

How to Assign the Severity of Usability Problems

Jeff Sauro • June 7, 2016

While it's generally straightforward to count how many times you observe a problem in a usability test, assigning severity ratings to problems can be more challenging. There are often too many problems to fix. Severity ratings help development teams prioritize what does and doesn't get fixed. Here are five steps to follow for establishing a system for assigning problem severity after observing problems in a usability test: Agree on a severity scale; Train evaluators; Have at least two evaluators rate independently; Evaluate agreement; Average or reconcile the differences in ratings.[Read More]


Should All Graphs Start at 0?

Should All Graphs Start at 0?

Jeff Sauro • May 31, 2016

While it's a good idea to have best practices with displaying data in graphs, the "show the zero" is a rule that clearly can be broken. But showing or not showing the zero alone is not sufficient to declare a graph objective or conversely "deceptive." There isn't an objective graph. But if people want to deceive, they will and the unfocused reader may certainly be swayed. But often displaying the data with or without the zero can provide a different perspective for readers to reconsider the context and the implications.[Read More]


Can You Take the Mean of Ordinal Data?

Can You Take the Mean of Ordinal Data?

Jeff Sauro • May 24, 2016

Yes, of course you can. But it depends on who you ask! It's a common question and point of contention when measuring human behavior using multi-point rating scales. Whether someone tells you it's permissible to take the average of ordinal data depends on their view of measurement theory—and not all people agree. Using the mean of ordinal data is fine; just be careful not to make interval or ratio statements about your data -- even researchers who take a more relaxed view of averaging ordinal data would disagree with that practice.[Read More]

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About Jeff Sauro

About Jeff Sauro

Jeff Sauro is the founding principal of MeasuringU, a company providing statistics and usability consulting to Fortune 1000 companies.
He is the author of over 20 journal articles and 5 books on statistics and the user-experience.
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