Articles by Jeff Sauro, PhD
Dr. Sauro is a six-sigma trained statistical analyst, CEO and founder of MeasuringU. He has consulted with companies such as Google, Meta, and Walmart, and has published over 25 peer-reviewed articles and seven books, including Surveying the User Experience.
The Relationship Between Problem Frequency and Problem Severity in Usability Evaluations
Abstract The relationship between problem frequency and severity has been the subject of an ongoing discussion in the usability literature. There is conflicting evidence as to whether more severe problems affect more users or whether problem severity and frequency are independent, especially in the cases where problem severity is based on the judgment of the […] [Read More]
Rent a Car in Just 0, 60, 240 or 1,217 Seconds? – Comparative Usability Measurement, CUE-8
Abstract This paper reports on the approach and results of CUE-8, the eighth in a series of Comparative Usability Evaluation studies. Fifteen experienced professional usability teams simultaneously and independently measured a baseline for the usability of the car rental website Budget.com. The CUE-8 study documented a wide difference in measurement approaches. Teams that used similar […] [Read More]
When 100% Really Isn’t 100%: Improving the Accuracy of Small-Sample Estimates of Completion Rates
Abstract Small sample sizes are a fact of life for most usability practitioners. This can lead to serious measurement problems, especially when making binary measurements such as successful task completion rates (p). The computation of confidence intervals helps by establishing the likely boundaries of measurement, but there is still a question of how to compute […] [Read More]