The impact of task phrasing on the choice of search keywords and on the search process and success
Journal of the American Society for Information Science and Technology
Journal of the American Society for Information Science and Technology
Determinant of Intention to Use Search Engine Advertising: A Conceptual Model
International Journal of Enterprise Information Systems
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The purpose of this study is to investigate the role that domainknowledge plays in users' interactions with information systems.Two groups of users with two different areas of expertise wererecruited for 34 experimental sessions to answer two researchquestions: (a) Does one group's domain knowledge (Geography majors)affect their performance on an information system more than anothergroup's domain knowledge (Computer Science majors)? (b) Are thereany differences and/or similarities in the performance of the twogroups in terms of the information problem-solving processes? Taskcompletion time, task completeness, and mouse movements werecollected while users performed six tasks during the experimentalsessions. Data were analyzed through repeated measures. An ANOVAwas used for task completion time and task completeness. GOMS(Goals, Operators, Methods, and Selection rules) was also used formouse movements to identify some of the similarities anddifferences between the two groups' information problem-solvingprocesses. The GOMS analysis found the two groups' processingactivities to be remarkably similar. The ANOVA results indicatethat expertise type was not a major factor influencing userperformance, but task and task combined with the type of expertiseplayed a significant role in the users' interactions with theinterface. External operators, goal decompositions, and methodsrelated to the problem solving process through GOMS are alsopresented. © 2007 Wiley Periodicals, Inc.