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2009
ACM

Comparison of three one-question, post-task usability questionnaires

13 years 5 days ago
Comparison of three one-question, post-task usability questionnaires
Post-task ratings of difficulty in a usability test have the potential to provide diagnostic information and be an additional measure of user satisfaction. But the ratings need to be reliable as well as easy to use for both respondents and researchers. Three one-question rating types were compared in a study with 26 participants who attempted the same five tasks with two software applications. The types were a Likert scale, a Usability Magnitude Estimation (UME) judgment, and a Subjective Mental Effort Question (SMEQ). All three types could distinguish between the applications with 26 participants, but the Likert and SMEQ types were more sensitive with small sample sizes. Both the Likert and SMEQ types were easy to learn and quick to execute. The online version of the SMEQ question was highly correlated with other measures and had equal sensitivity to the Likert question type. Author Keywords Usability evaluation, satisfaction measures, post-task ratings, sensitivity, external validit...
Jeff Sauro, Joseph S. Dumas
Added 24 Nov 2009
Updated 24 Nov 2009
Type Conference
Year 2009
Where CHI
Authors Jeff Sauro, Joseph S. Dumas
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