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Impacts of navigation structure, task complexity, and users' domain knowledge on Web site usability-an empirical study

机译：导航结构，任务复杂性和用户领域知识对网站可用性的影响-实证研究

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摘要

It is essential for designers of Web sites to understand what navigation structure results in better usability for knowledge acquisition tasks of varying complexity and the Web site users with different level of domain knowledge. Literature shows that multiple factors may exert influence on Web site usability. Navigation structure, task complexity, and user domain knowledge level are among of those factors. Hypotheses are developed about the usability of alternative navigation structures, with different task complexity and user domain knowledge level. Experiments are designed and conducted to test these hypotheses in terms of user performance (accuracy, speed) in accomplishing sets of simple and comparatively complex knowledge acquisition tasks. User perceptions of usability are also measured. Two rounds of experimentation are performed, one with participants who have been trained in the domain of production and operations management, the other with participants who have not been trained in this domain. The results show that a usage-oriented hierarchy or a combined hierarchy are navigation structures associated with statistically significantly higher performance usability than a subject-oriented hierarchy, for both simple and relatively complex knowledge acquisition task sets. A statistically significant effect of domain knowledge on the perception aspect of usability is identified. The study contributes to enhancing the comprehension of researchers, practitioners, and educators about design and usability of Web site navigation structures.
机译：网站设计人员必须了解哪种导航结构可以更好地适用于复杂程度不同的知识获取任务以及具有不同级别知识的网站用户。文献表明，多种因素可能会影响网站的可用性。导航结构，任务复杂性和用户域知识水平都在这些因素之中。关于具有不同任务复杂性和用户域知识水平的替代导航结构的可用性的假设被开发出来。设计并进行实验，以在完成一组简单和相对复杂的知识获取任务时，根据用户性能（准确性，速度）测试这些假设。还评估了用户对可用性的看法。进行了两轮实验，一轮是与在生产和运营管理领域中受过培训的参与者一起进行的，另一轮是与未在该领域中受过培训的参与者一起进行的。结果表明，对于简单和相对复杂的知识获取任务集，面向使用的层次结构或组合的层次结构是导航结构，与基于主题的层次结构相比，统计可用性显着更高。确定了领域知识对可用性的感知方面的统计学显着影响。该研究有助于增强研究人员，从业人员和教育工作者对网站导航结构的设计和可用性的理解。

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