Measuring the User Experience: Collecting, Analyzing, and Presenting Usability Metrics (Interactive Technologies) by William Albert & Thomas Tullis

Author:William Albert & Thomas Tullis [Albert, William]
Language: eng
Format: mobi
ISBN: 9780124157927
Publisher: Elsevier Science
Published: 2013-05-22T14:00:00+00:00

Calculating a SUS Score

To calculate a SUS score, first sum the score contributions from each item. Each item’s score contribution will range from 0 to 4. For items 1, 3, 5, 7, and 9, the score contribution is the scale position minus 1. For items 2, 4, 6, 8, and 10, the contribution is 5 minus the scale position. Multiply the sum of the scores by 2.5 to obtain the overall SUS score. Consider the sample data in Figure 6.8. The sum of the values, using these rules, is 22. Multiply that by 2.5 to get the overall SUS score of 55 or, better yet, download our spreadsheet for calculating SUS scores from www.MeasuringUX.com.

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