已有 4003 次阅读 2020-12-1 15:39 |个人分类:我看办刊|系统分类:科研笔记

随着Early Access(有的出版社用Online First或其他类似表达)的进展,影响因子的计算也相应地会在明年微调,相关政策已经发布,Clarivate官网链接:


What’s next for JCR: defining ‘Early Access'


Content Team Lead, JCR


Last month, we announced the introduction of Early Access content into the Journal Citation Reports™ (JCR). In this article, we provide further details on how we define Early Access content and how it will be introduced into the 2021 JCR release.


What is ‘Early Access’ for the Web of Science?

We define Early Access as Version of Record content that is published online prior to final assignment in a completed volume/issue. We are using as “A fixed version of a journal article that has been made available by any organization that acts as a publisher by formally and exclusively declaring the article ’published’.” Although this definition refers to articles specifically, we apply this concept more broadly to any document type provided it meets the same criteria.
To qualify as Early Access, content must:

  • be the version of record that will not change, aside from the final assignment in a volume/issue

  • include a DOI that will not change

  • include an Early Access publication date

  • include the cited references if present in the version of record

  • not include volume, issue, page range, final publication date

  • be published in a journal with a volume/issue model*

* Journals that follow a continuous article publication (CAP), “build online” model or publish only in print are not eligible for Early Access indexing.


What’s changing for JCR?

We are introducing Early Access to the 2021 JCR release (2020 data) using a phased, prospective approach to accommodate timing differences in publisher onboarding. We will use the Early Access publication year for 2020 and subsequent years; for prior years, we will use the final publication year. This approach is consistent with previous prospective policy changes and brings more consistency to JCR handling of Early Access with the Web of Science™ and InCites™ .

The majority of articles have an Early Access publication date that is within the same calendar year as the final publication date. Our treatment of these items in JCR will not change under the new policy. For the minority of Early Access content where the Early Access publication date is in a different year from the final publication date, we will only use the Early Access date. For example, citations from an article published with an Early Access date of 2020 and a final publication date of 2021 will contribute to the numerator of the 2020 Journal Impact Factor™ (JIF) but not to the 2021 JIF; that same article will contribute to the denominator of the 2021 JIF and the 2022 JIF but not to the 2023 JIF. In contrast, a non-Early Access item with a publication date of 2021 will contribute citations to the 2021 JIF and contribute to the denominator of the 2022 JIF and the 2023 JIF.

2020 JIF numerator

Starting with content indexed in 2020, we will include items in the JCR according to the earliest availability of the Version of Record. This means that the 2020 JIF numerator will include citations from:

  • Early Access items with an early access year of 2020

  • Early Access items with a final publication year of 2020 and an Early Access year of 2019 or earlier*

  • Non-Early Access items with a final publication year of 2020

* This is a transitional step for the 2021 JCR release (2020 data) only.


2020 JIF denominator

There will be no Early Access contribution to the 2020 JIF denominator; the denominator will only include citable items with a final publication date of 2018 and 2019.

Learn more about the Journal Citation Reports, the world’s leading journals with publisher-neutral data.

上一篇:同济大学第一本SCI期刊诞生,Underground Space
下一篇:贺Journal of Ocean Engineering and Science被SCI收录

3 武夷山 许培扬 邱敦莲

该博文允许注册用户评论 请点击登录 评论 (1 个评论)


Archiver|手机版|科学网 ( 京ICP备07017567号-12 )

GMT+8, 2021-12-2 15:53

Powered by

Copyright © 2007- 中国科学报社