Winkmann G, Schlutius S, Schweim H G
Hürth, Germany.
Dtsch Med Wochenschr. 2002 Jan 25;127(4):131-7. doi: 10.1055/s-2002-19715.
A preference for English-language sources during determination of Journal Impact Factors (IF) was discussed, IF being published in the annual Journal Citation Reports (JCR). The JCR are derived from data in Science Citation Index (SCI). The aim of this study was, therefore, (i) to review publication countries and languages in JCR, (ii) publication languages in SCI in comparison to further recognised medical bibliographic databanks.
Searching (i) countries and languages in JCR Science-Editions 1997 and 1998, (ii) language distributions in publication years 1995 - 2000 in bibliographic databanks SCI, MEDLINE (ME) and EMBASE (EM).
(i) Almost 70 % journals in JCR 1997 and 1998 were published in USA, United Kingdom, or The Netherlands. Of two language options present, a number of English-classified journals contained >90 % articles in other languages, whereas >90 % publications in English could occur in Multi-Language (ML) journals, thereby complicating statistical comparisons. 83,9 % JCR-periodicals in 1997 and 85,6 % in 1998 were classified English. English/ML ratios increased exponentially with increasing IF. (ii) 95,5 % of the articles documented 1995 - 2000 in whole SCI and in our constructed SCI segment >>Medicine and related areas<< were written in English, compared to 88,5 % in ME and 89,8 % in EM. The SCI Medicine segment was 15 % more comprehensive than either MEDLINE or EMBASE. Highly significant differences of language distributions in SCI vs. MEDLINE and especially SCI vs. EMBASE were observed. Retrieval rates in SCI of German-, French-, Japanese- and Chinese-language medical papers published in 2000 were impressively augmented by EMBASE and MEDLINE.
(i) Anglo-American publishers' countries and English-language journals prevail in JCR with respect to numbers and IF levels. Publication language English favours citation frequency. (ii) Of databanks studied, SCI shows a maximum preference for English-language sources, thereby causing an English Language Bias during IF derivation.
在确定期刊影响因子(IF)时对英文来源的偏好受到了讨论,IF 在年度《期刊引用报告》(JCR)中公布。JCR 数据源自《科学引文索引》(SCI)。因此,本研究的目的是:(i)回顾 JCR 中的出版国家和语言,(ii)将 SCI 中的出版语言与其他公认的医学文献数据库进行比较。
检索(i)1997 年和 1998 年 JCR 科学版中的国家和语言,(ii)1995 - 2000 年出版年份中文献数据库 SCI、医学在线数据库(MEDLINE,简称 ME)和荷兰医学文摘数据库(EMBASE,简称 EM)中的语言分布情况。
(i)1997 年和 1998 年 JCR 中近 70%的期刊在美国、英国或荷兰出版。在两种语言选项中,一些被归类为英文的期刊包含超过 90%的其他语言文章,而在多语言(ML)期刊中可能有超过 90%的英文出版物,这使得统计比较变得复杂。1997 年 83.9%的 JCR 期刊和 1998 年 85.6%的 JCR 期刊被归类为英文。英文/多语言比率随影响因子的增加呈指数增长。(ii)1995 - 2000 年在整个 SCI 以及我们构建的 SCI 子领域“医学及相关领域”中记录的文章,95.5%是用英文撰写的,相比之下,MEDLINE 中这一比例为 88.5%,EMBASE 中为 89.8%。SCI 医学子领域比 MEDLINE 或 EMBASE 都要全面 15%。观察到 SCI 与 MEDLINE 以及特别是 SCI 与 EMBASE 在语言分布上存在高度显著差异。2000 年发表的德语、法语、日语和中文医学论文在 SCI 中的检索率因 EMBASE 和 MEDLINE 而显著提高。
(i)就数量和影响因子水平而言,英美出版商所在国家和英文期刊在 JCR 中占主导地位。出版语言为英文有利于提高被引用频率。(ii)在所研究的数据库中,SCI 对英文来源的偏好最大,从而在影响因子推导过程中导致英文语言偏向。