Development of an instrument measuring user satisfaction of the human-computer interface
CHI '88 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Usability Engineering
Handbook of Usability Testing: How to Plan, Design, and Conduct Effective Tests
Handbook of Usability Testing: How to Plan, Design, and Conduct Effective Tests
A Practical Guide to Usability Testing
A Practical Guide to Usability Testing
What do usability evaluators do in practice?: an explorative study of think-aloud testing
DIS '06 Proceedings of the 6th conference on Designing Interactive systems
Scrutinising usability evaluation: does thinking aloud affect behaviour and mental workload?
Behaviour & Information Technology
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The effect of global instructions on think-aloud testing
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
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We describe an empirical, between-subjects study on the use of think-aloud protocols in usability testing of a federal data-dissemination Web site. This double-blind study used three different types of think-aloud protocols: a traditional protocol, a speech-communication protocol, and a coaching protocol. A silent condition served as the control. Eighty participants were recruited and randomly pre-assigned to one of four conditions. Accuracy and efficiency measures were collected, and participants rated their subjective satisfaction with the site. Results show that accuracy is significantly higher in the coaching condition than in the other conditions. The traditional protocol and the speech-communication protocol are not statistically different from each other with regard to accuracy. Participants in the coaching condition are more satisfied with the Web site than participants in the traditional or speech-communication condition. In addition, there are no significant differences with respect to efficiency (time-on-task). This paper concludes with recommendations for usability practitioners.