科睿唯安(Clarivate)發布了 2025 年度 Journal Citation Reports (JCR) ，在計算 Journal Impact Factor 的分子時，JCR 現剔除與被撤稿內容相關的引用——不論是引用還是被引，以確保被撤稿論文的相關引用不會對 Journal Impact Factor 數值造成影響。
2025年JCR的變化
繼過去兩年期刊影響因子擴展和綜合排名（將期刊影響因子發展成為衡量所有學科影響力和可信度的期刊級指標）之後，今年的發布繼續為 Web of Science 核心合集中的所有符合條件的期刊提供期刊影響因子。 229 個科學和社會科學類別的期刊將繼續按類別在不同版本中進行排名，無論其引用影響力如何。
今年的發布改變了管理撤稿的方式，旨在主動保護 JIF 免受近年來撤稿率上升可能造成的數據扭曲的影響。撤稿內容的引用和引用結果均不計入今年的 JIF 指標。雖然這些引用只佔 JCR 和指標計算中引用量的一小部分，但這項變更降低了因工作有缺陷或詐欺而導致指標膨脹的風險，並加強了學術出版的責任制。
查詢JCR：https://er.kmu.edu.tw/user/login/?next=/er/geter/DB000000024/
進一步了解：
Celebrating 50 years of Journal Citation Reports
Journal Citation Reports 2025 Statistic
Clarivate has released its 2025 Journal Citation Reports (JCR), which now excludes citations related to retracted content - whether citing or being cited - from the numerator of the Journal Impact Factor to ensure that citations related to retracted papers do not affect the Journal Impact Factor. In calculating the numerator of the Journal Impact Factor, JCR now excludes citations related to the retracted content, whether cited or quoted, to ensure that citations related to the retracted paper do not affect the Journal Impact Factor.
Changes in 2025
Following on the Journal Impact Factor expansion and combined rankings from the past two years – evolving the JIF to a journal-level marker of both impact and trustworthiness across all disciplines – this year’s release continues to provide JIFs for all eligible journals in the Web of Science Core Collection. Journals in 229 science and social science categories continue to be ranked by category across editions, regardless of citation impact.
This year’s release sees a change in how we manage retractions to proactively safeguard the JIF from potential distortions stemming from the increased rate of retraction in recent years. Citations to and from retracted content are not counted in this year’s JIF metrics. While these are a small portion of citations present in the JCR and the metrics calculations, this change reduces the risk of metric inflation due to flawed or fraudulent work, and reinforces accountability in scholarly publishing.
JCR：https://er.kmu.edu.tw/user/login/?next=/er/geter/DB000000024/
More detail：
Celebrating 50 years of Journal Citation Reports
Journal Citation Reports 2025 Statistic
