%0期刊文章%@ 2291- 9694% I Gunther Eysenbach %V 3% N 3% P e25% T使用全天PubMed查询日志分析PubMed用户会话:有经验和无经验PubMed用户的比较%A Yoo,Illhoi %A Mosa,Abu Saleh Mohammad %+密苏里大学医学院健康管理和信息系，五医院博士，CE718临床支持和教育大楼(DC006.00)，哥伦比亚，密苏里州，65212，美国，1 573 882 7642yooil@health.missouri.edu %K PubMed %K MEDLINE %K信息检索%K有经验用户%K无经验用户%K PubMed查询日志%D 2015 %7 02.07.2015 %9原始论文%J JMIR Med Inform %G英文%X背景:PubMed是互联网上最大的生物医学文献信息源。PubMed被认为是最新医疗保健证据的最重要和最可靠的来源之一。之前的研究使用PubMed检验了领域专业知识/知识对搜索性能的影响。然而，关于PubMed用户对信息检索(IR)函数的知识及其在查询公式中的使用，我们所知甚少。目的:本研究的目的是通过分析全天查询日志来阐明有经验/无经验PubMed用户如何执行搜索查询。我们的假设是:(1)使用系统功能的有经验的PubMed用户可以快速检索相关文档;(2)不使用系统功能的无经验的PubMed用户比有经验的用户有更长的搜索会话。方法:为了验证这些假设，我们分析了包含近300万条查询的PubMed查询日志数据。用户会话分为两类:有经验和无经验。 We compared experienced and nonexperienced users per number of sessions, and experienced and nonexperienced user sessions per session length, with a focus on how fast they completed their sessions. Results: To test our hypotheses, we measured how successful information retrieval was (at retrieving relevant documents), represented as the decrease rates of experienced and nonexperienced users from a session length of 1 to 2, 3, 4, and 5. The decrease rate (from a session length of 1 to 2) of the experienced users was significantly larger than that of the nonexperienced groups. Conclusions: Experienced PubMed users retrieve relevant documents more quickly than nonexperienced PubMed users in terms of session length. %M 26139516 %R 10.2196/medinform.3740 %U http://medinform.www.mybigtv.com/2015/3/e25/ %U https://doi.org/10.2196/medinform.3740 %U http://www.ncbi.nlm.nih.gov/pubmed/26139516