全称社会科学引文索引(Social Sciences Citation Index, SSCI),是一种跨学科的学术引用文献索引,由美国科学资讯研究所(Institute for Scientific Information, ISI)所发展,类似于科学引文索引,为汤森路透(Thomson Reuters)的产品。它关注的是社会科学文献资料。社会科学引用索引透过分析学术文献引用的资讯,了解目前社会科学领域中最有影响力的研究成果,并且说明相关性及先前文献对当前文献的影响力。目前它包含世界上主流的社会科学学术期刊,共有2,474种期刊,并且横跨约50种的学科,目前社会科学引用索引可由付费的Web of Science学术文献数据库中检索。
如前所述,SCI主要覆盖的是自然科学领域的期刊。而SSCI则主要关注社会科学领域的期刊。
四、EI的含义
全称工程索引(EI),是由美国工程信息公司(Engineering information Inc.)编辑出版,历史上最悠久的一部大型综合性检索工具。EI在全球的学术界、工程界、信息界中享有盛誉,是科技界共同认可的重要检索工具。EI主要收录工程技术领域的重要文献,包括期刊以及会议文献,另外也收录一些科技报告、专著等。EI收录包括三种类型:被EI核心收录、非核心收录(Pageone收录)、会议论文。 从2009年起已经没有核心检索和非核心检索的区别,现在全是核心检索。但是还分为期刊检索和会议检索。
The Science Citation Index (SCI) is a sub-set of the Science Citation Index Expanded (SCIE), containing journals that rank competitively among the most highly-cited core journals in their category or categories. The Science Citation Index Expanded is essentially the web version of what used to be a database available only on CDRom/Diskette.
When selecting the journals for the Science Citation Index we choose the top journals from each subject category and supplement this with top regional journals from each category to give broad geographic and multidisciplinary coverage. The evaluation of and acceptance of a journal for the Science Citation Index Expanded or the Science Citation Index is essentially the same with one major difference.
This difference is in the application of citation analysis to the journal. While every science journal in our database is covered in the Science Citation Index Expanded and only those journals of relatively significantly higher citation impact are selected for the Science Citation Index. In other words, Science Citation Index covers only the most highly cited, highest impact journals in each category. This is because of the constraints of the CDROM and print media there is no difference in the selection process for Science Citation Index and Science Citation Index Expanded journals.