Structural analysis of verbal data
CHI '87 Proceedings of the SIGCHI/GI Conference on Human Factors in Computing Systems and Graphics Interface
Learning and transfer of measurement tasks
CHI '89 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Directed dialogue protocols: verbal data for user interface design
CHI '89 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Converting to graphical user interfaces: design guidelines for success
CHI '95 Conference Companion on Human Factors in Computing Systems
Converting to graphical user interfaces: design guidelines for success
CHI '94 Conference Companion on Human Factors in Computing Systems
Computer-assisted evaluation of interface designs
ACM SIGMIS Database
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Eight subjects experienced in the use of both 7000 and 11000 series oscilloscopes performed four typical tasks with each scope. The 7000 interface is a dedicated physical control system, while the 11000 system employs icons, pop-up menus, assignable controls, and a touch panel. On each trial the task time and measurement accuracy were recorded. Each experimental session was video recorded and verbal protocols were collected. These allowed decomposition of the subjects' behaviors into categories that would account for performance differences between the two scopes. A 77% performance difference is explained in terms of the cognitive factors of strategy selections and recall of operational details.