Effect of Thinking Aloud on UX Metrics: A Review of The Evidence

Think Aloud (TA) usability testing is a popular UX research method. Having participants speak their thoughts as they attempt tasks helps researchers understand possible sources of misunderstandings so they can identify and potentially fix problems. The signature method of having users think aloud can trace its roots back to psychoanalysis and work from Freud (psychoanalysis),

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Does Changing the Number of Response Options Affect Rating Behavior?

Changing the number of response options in the survey might confuse participants. Over the years, we’ve heard variations on this concern articulated a number of different ways by clients and fellow researchers. Surveys and unmoderated UX studies commonly contain a mix of five-, seven-, and eleven-point scales. That leads some to express concern. Why are

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Comparison of SEQ With and Without Numbers

Over the past few months, we’ve conducted several studies with different versions of the seven-point Single Ease Question (SEQ®), a popular task-level metric for perceived ease-of-use. As we’ve seen with other research on rating scales, response means tend to be rather stable despite often salient changes to formatting. In our earlier SEQ research, we found

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Comparing Two SEQ Item Wordings

We use the seven-point Single Ease Question (SEQ®) frequently in our practice, as do many other UX researchers. One reason for its popularity is the body of research that started in the mid-2000s with the comparison of the SEQ to other similar short measures of perceived ease-of-use, the generation of a normative SEQ database, and

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What Is the Product-Market Fit (PMF) Item?

A social media platform, a GPS heads-up display, a video streaming platform: all are examples of viable products … that failed. The failure came despite often substantial financial funding and putatively useful features. Their failures were blamed on poor product-market fit. Predicting a prospective product’s success in the market isn’t easy. But there’s a strong

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Eight Laws of Statistics

Statistics doesn’t have a Magna Carta, constitution, or bill of rights to enumerate laws, guiding principles, or limits of power. There have been attempts to articulate credos for statistical practice. Two of the most enduring ones are based on the work by Robert P. Abelson, a former statistical professor at Yale. If Abelson wasn’t the

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Sample Sizes for Comparing SUS to a Benchmark

The System Usability Scale (SUS) has been used in industrial user experience research since the mid-1980s. Despite its age, the SUS is still a popular measure, widely used in benchmark tests of software products to measure perceived usability. One reason for its popularity is the extent to which its measurement properties have been comprehensively studied

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Five Styles of Statistical Rhetoric

When learning statistics, you’ll encounter many formulas based on principles of probability and mathematics. But statistics isn’t just a formulaic process where you enter data and are told what to do. Statistics should guide, not dictate, decisions. In making decisions, though, there are different styles of interpreting data. Although a lot of people think statistics

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UX and Net Promoter Benchmarks of Seller Marketplace Websites

When we think of how the internet has changed commerce, we often consider our ability to browse and purchase products from around the world easily from the comfort of our homes with our mobile phones. But the internet has also enabled millions of people to easily sell their products to global consumers. That selling often

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UX-Lite Usefulness Update

Can an experience be useful without meeting your needs? The UX-Lite™ is a new questionnaire that evolved from the SUS and the UMUX-Lite. It has only two items, one measuring perceived Ease and one measuring perceived Usefulness, as shown in Figure 1. Because the verbal complexity of the original Usefulness item stands in stark contrast

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