Comparison of three one-question, post-task usability questionnaires
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Correlations among prototypical usability metrics: evidence for the construct of usability
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The Factor Structure of the System Usability Scale
HCD 09 Proceedings of the 1st International Conference on Human Centered Design: Held as Part of HCI International 2009
The Usability Metric for User Experience
Interacting with Computers
When designing usability questionnaires, does it hurt to be positive?
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Quantifying the User Experience: Practical Statistics for User Research
Quantifying the User Experience: Practical Statistics for User Research
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In this paper we present the UMUX-LITE, a two-item questionnaire based on the Usability Metric for User Experience (UMUX) [6]. The UMUX-LITE items are This system's capabilities meet my requirements and This system is easy to use." Data from two independent surveys demonstrated adequate psychometric quality of the questionnaire. Estimates of reliability were .82 and .83 -- excellent for a two-item instrument. Concurrent validity was also high, with significant correlation with the SUS (.81, .81) and with likelihood-to-recommend (LTR) scores (.74, .73). The scores were sensitive to respondents' frequency-of-use. UMUX-LITE score means were slightly lower than those for the SUS, but easily adjusted using linear regression to match the SUS scores. Due to its parsimony (two items), reliability, validity, structural basis (usefulness and usability) and, after applying the corrective regression formula, its correspondence to SUS scores, the UMUX-LITE appears to be a promising alternative to the SUS when it is not desirable to use a 10-item instrument.