The SUPR-Q is a 13 item questionnaire for measuring Usability, Credibility/Trust, Loyalty and Appearance of websites. Download a spreadsheet to generate a percentile ranking to see where a website compares to a database of 200 other websites. Full license also provides access to 100 website scores.[Read More]
The SUPR-Q is a 13 item questionnaire for measuring Usability, Credibility/Trust, Loyalty and Appearance of websites. Download a spreadsheet to generate a percentile ranking to see where a website compares to a database of 200 other websites. [Read More]
A comprehensive benchmark report with Net Promoter Scores, Usability Scores, Key Drivers and Analysis for 17 consumer and productivity software products from over 1700 current customers.[Read More]
This package contains both the SUS Calculator and 150 page Practical Guide to SUS. It contains many examples, graphs, tables, benchmarks and best practices for using SUS. The calculator helps prevent improper coding, compares two SUS Scores statistically, handles missing values, computes sample sizes, converts SUS scores to percentile ranks and letter grades and checks the internal reliability of the responses. [Read More]
A 27 page how-to-guide and Excel calculator that computes sample sizes for rating scales and binary response items. This package allows you to easily answer the common question: What sample size do I need for my survey? It includes plenty of examples and tips for computing the right sample size based on the question type and response analysis for Binary Responses, Rating Scales and Net Promoter Scores.[Read More]
A package of the popular How to Conduct a Quantitative Usability Test Report and four of the most commonly used excel calculators for getting started measuring and reporting usability with confidence.[Read More]
Do you know how to measure usability? Do you have questions about the benefits and process for conducting a quantitative usability test? I've assembled answers to the 72 most common questions that arise from measuring usability. In this 64 page report I provide concrete examples and plenty of data from a dataset of 120 usability tests, the latest usability research and my decade of experience conducting quantitative usability tests.[Read More]
Estimate how many users will experience a problem you see in a small sample usability test by entering the number who encountered the problem and your sample size. Also estimate the probability you can detect problems given your sample size.[Read More]
An excel calculator for task times that provides an easy way to compute the geometric mean, confidence intervals and a 1-sample t-test to compare a sample against a benchmark.[Read More]
Calculate the common statistical tests, sample sizes and use some advanced statistical tests on usability data. This calculator package contains everything the Usability Statistics Package contains, but is expanded to included sample sizes calculators for margins of error and power calculations for comparing two applications. It also contains ANOVA and Chi-Square tests to compare multiple means or completion rates. This package takes the guess work out of what tests to perform on your usability data.[Read More]
Compare the four different binomial confidence calculations: Adjusted-Wald, Wald, Exact and Score in an Excel spreadsheet. This calculator contains all the formulas for you to easily compare the methods and integrate them into your Excel workbooks.[Read More]
An excel calculator that provides an easy way to find the area under the normal curve from a z-score or lookup a z-score from area (inverse look-up).[Read More]
A complete and concise 51 page tutorial on how to compute, interpret and use of one of the most important concepts in statistics: z-scores. This crash course includes dozens of pictures, review questions and two full z-score look-up tables.[Read More]
This package contains both the popular 51 page Crash Course in zScores tutorial and the best-selling zScore Excel calculator at a discounted price.[Read More]
Jeff Sauro is the founding principal of Measuring Usability LLC, a company providing statistics and usability consulting to
Fortune 1000 companies.
He is the author of over
15 journal articles and 3 books on statistics and the user-experience.
More about Jeff...
Distrust in Social Networks: Google+, Twitter, Facebook
5 Examples of Quantifying Qualitative Data
25 Resources for Measuring Usability
Top 10 Research-Based Usability Findings of 2010
8 Ways to Show Design Changes Improved the User Experience
Confidence Interval Calculator for a Completion Rate
10 Things to Know about Usability Problems
A Brief History of the Magic Number 5 in Usability Testing
Why you only need to test with five users (explained)
How common are usability problems?
Should you use 5 or 7 point scales?
The Five Most Influential Papers in Usability
97 Things to Know about Usability
