Here is a comparison of QUIS, CSUQ, SUS, product reaction cards and other questionnaires used by Fidelity Investments usability group.
Conclusion
- One of the simplest questionnaires studied, SUS (with only 10 rating scales), yielded among the most reliable results across sample sizes.
- It was also the only one whose questions all address different aspects of the user’s reaction to the website as a whole.
- For the conditions of this study, sample sizes of at least 12-14 participants are needed to get reasonably reliable results.
A Comparison of Questionnaires for Assessing Website Usability
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