Coverage and citation impact of oncological journals in the Web of Science and Scopus
Coverage and citation impact of oncological journals in the Web of Science and Scopus
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DOI：
10.1016/j.joi.2008.08.001
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发表时间：
2008-10-01
影响因子：
3.7
通讯作者：
Moed, Henk F.
中科院分区：
文献类型：
--
作者：
Lopez-Illescas, Carmen;de Moya-Anegon, Felix;Moed, Henk F.
本文回顾了一些研究比较汤姆森科学的Web of Science（WoS）和爱思唯尔的Scopus。它整理了他们在一个重要的医学子领域：肿瘤学的期刊报道。结果发现，所有WoS覆盖的肿瘤学期刊（n = 126）在Scopus中被索引，但Scopus覆盖更多的期刊（额外的n = 106）。然而，后者的影响因子往往比WoS覆盖的期刊低得多。在Scopus中影响因子最高的前25%的来源中，94%在WoS中被索引，而最低的25%只有6%。简而言之，在肿瘤学领域，WoS是Scopus的一个真正的子集，并且倾向于从每篇论文的引用影响力方面覆盖其中最好的期刊。虽然Scopus覆盖的肿瘤学期刊比WoS多90%，但两个数据库索引的期刊的平均Scopus影响因子仅比WoS数据高2.6%。结果反映了覆盖政策的根本差异：WoS基于尤金加菲猫的概念，覆盖一组最常用的（引用）期刊; Scopus覆盖面广，更类似于大型学科文献数据库。该论文还发现，“经典的”，基于WoS的影响因素与一个新的，基于Scopus的指标SCImago JournalRank（SJR）密切相关，SCImago JournalRank是Pinski和Narin在早期工作基础上建立的一系列新指标之一[Pinski，G.，& Narin F.（1976年）的报告。引文对科学出版物的期刊聚合的影响：理论，应用于物理学文献。Information Processing and Management，12，297 - 312]，根据引用期刊的声望对引用进行加权（斯皮尔曼的rho = 0.93）。提出了未来研究的四个方向。(C)2008爱思唯尔有限公司保留所有权利。
This paper reviews a number of studies comparing Thomson Scientific's Web of Science (WoS) and Elsevier's Scopus. It collates their journal coverage in an important medical subfield: oncology. It is found that all WoS-covered oncological journals (n = 126) are indexed in Scopus, but that Scopus covers many more journals (an additional n = 106). However, the latter group tends to have much lower impact factors than WoS covered journals. Among the top 25% of sources with the highest impact factors in Scopus, 94% is indexed in the WoS, and for the bottom 25% only 6%. In short, in oncology the WoS is a genuine subset of Scopus, and tends to cover the best journals from it in terms of citation impact per paper. Although Scopus covers 90% more oncological journals compared to WoS, the average Scopus-based impact factor for journals indexed by both databases is only 2.6% higher than that based on WoS data. Results reflect fundamental differences in coverage policies: the WoS based on Eugene Garfield's concepts of covering a selective set of most frequently used (cited) journals; Scopus with broad coverage, more similar to large disciplinary literature databases. The paper also found that 'classical', WoS-based impact factors strongly correlate with a new, Scopus-based metric, SCImago JournalRank (SJR), one of a series of new indicators founded on earlier work by Pinski and Narin [Pinski, G., & Narin F. (1976). Citation influence for journal aggregates of scientific publications: Theory, with application to the literature of physics. Information Processing and Management, 12, 297 - 312] that weight citations according to the prestige of the citing journal (Spearman's rho = 0.93). Four lines of future research are proposed. (C) 2008 Elsevier Ltd. All rights reserved.