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论文编号：	12652
作者编号：	2120192911
上传时间：	2021/6/18 14:57:29
中文题目：	突发公共卫生事件情境下任务与信息搜索行为关系研究
英文题目：	Research on the Relationship between Task and Information Search Behaviorin the Context of Public Health Emergencies
指导老师：	李月琳
中文关键字：	突发公共卫生事件；任务；交互信息搜索行为
英文关键字：	Public Health Emergency;Task-oriented; Interactive Information SearchingBehavior
中文摘要：	新型冠状病毒肺炎的暴发对公众的日常生活尤其是个人健康产生了较大影响，因此在疫情期间公众出于其自身健康防护的需求会利用各种渠道获取相关信息。在类似突发公共卫生事件情境下公众的信息需求已有相关研究予以揭示，但是驱动这些信息需求产生的任务却鲜有研究进行探索。同时，在疫情期间搜索引擎成为了公众获取信息的重要渠道之一。但搜索引擎收录的大量的信息在一定程度上会让用户处于信息过载的状态，较多的信息负载会降低用户的信息效率；另一方面，各类可信度存疑的信息也会增加用户获取信息的成本。因此在类似情境下，研究用户在搜索引擎上的搜索行为、发掘搜索引擎存在的问题对于保障用户高效、高质量的信息获取有重要意义。 本研究首先以半结构化深度访谈法对突发公共卫生事件不同发展阶段中大学生群体的信息需求进行了探讨。之后依据突发公共卫生事件不同发展阶段中大学生群体的信息需求对驱动这些需求产生的任务进行了归纳总结，共识别出了解疫情相关信息、实现自身健康防护以及维持正常生活秩序三类任务。此外还利用任务分面分类法对这些任务的详细属性进行了进一步的描述和讨论。其次，本研究再通过实验方法研究了突发公共卫生事件情境下产生的不同类型任务对用户在搜索引擎上的信息搜索行为及搜索评价产生的影响，同时也考察了用户在利用搜索引擎完成情景模拟任务时的实际表现。研究发现：在突发公共卫生事件情境下，不同类型的任务会影响用户所提交检索式的长度、用户浏览检索结果的标题条数、用户浏览检索结果页面的数量以及用户在检索结果页面停留的时间，同时也会影响用户在主观任务复杂度、主题熟悉程度、任务完成质量水平以及后测困难度上的评价。另外，在突发公共卫生事件的情境下，用户对信息搜索的时间成本更为敏感，对信息的准确性、权威性也有更高的期望水平。研究根据实验结果对搜索引擎提出了相应的改进建议。 本研究对突发公共卫生事件情境下的信息需求、信息行为研究进行了丰富，有助于了解用户在类似情境下的信息搜索行为，也有利于搜索引擎在类似情境下提供更加准确、高效的信息搜索服务。
英文摘要：	The outbreak of New Coronavirus pneumonia has a great impact on the public's daily life, especially personal health. Therefore, during the epidemic period, the public will use various channels to obtain relevant information for their own health protection needs. In the context of similar public health emergencies, there are many studies to reveal the public's information needs, but few studies reveal the tasks that drive these information needs.At the same time, during the public health emergencies, search engine hasbecome one of the important channels for publicto obtain information.However, thoseinformation onthe internet will lead users to the state of information overload and reduce the information efficiency of users; on the other hand, some information with questionable credibility will also increase the cost of users to obtain information. Therefore, underpublic health emergencies, it is important to explore the search behavior of users on search engines and the problems of search engines to ensure their efficient and high-quality information acquisition. In this study, the information needs of college students in different development stages of public health emergencies were discussed by semi-structured in-depth interviews. Then, according to the information needs of college students in different development stages of public health emergencies, the tasks driving these needs are summarized, and three kinds of tasks are identified: understanding the information related to the epidemic situation, realizing their own health protection,and maintaining normal life order. In addition, the detailed attributes of these tasks are further described and discussed by using task facet classification. Secondly, this study discusses the impact of different types of tasks generated in the context of public health emergencies on the user's information search behavior and search evaluation on the search engine, and also investigates the user's actual performance when using the search engine to complete the simulation task. The results show that: in the context of public health emergencies, different types of tasks will affect the length of retrieval style submitted by users, the number of titles of search results, the number of search results pages browsed by users, and the time users stay on the search results page. At the same time, it also affects users' Evaluation on subjective task complexity, topic familiarity, task completion quality and post-test difficulty. In addition, in the context of public health emergencies, users are more sensitive to the time cost of search,theyalsohave higher expectations for the accuracy and authority of information. According to the experimental results, some suggestions are put forward to improve the search engine. This research has enriched the information needs and information behavior research in the context of public health emergencies, which is helpful to understand users' information search behavior in similar situations, and it is also conducive to search engines to provide more effective servicein similar situations service.
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