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shizishanshang

至尊木虫 (职业作家)

SEPI: 1
应助: 72 (初中生)
金币: 10570.4
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帖子: 3882
在线: 1215.1小时
虫号: 297159
注册: 2006-11-18
性别: GG
专业: 植物学

[交流] 大家交流一下自己本领域内杂志的自引率，是不是没有最高，只有更高已有2人参与

我自己先来吧。

生物类（主要指与植物相关）老牌杂志的IF普遍没有什么增加，甚至有的还略微下降。如plant cell去年9.396，今年破9了，跌到8.987了；
plant physiology 由去年6.451略升到今年的6.535；plant Journal去年6.948，今年则降到6.16；planta算是勉勉强强地保住了3分金身破，正好3.0。

与此相反，往常一些名不见经传的低分杂志，今年的IF却一路飙升，如PLANT CELL TISS ORG去年1.243，今年3.09，超过了老牌杂志PLANTA；PLANT MOL BIOL REP去年0.825，今年却达到了2.453；MOL BIOL REP去年1.875，今年却飙到了2.929,几近3。这是为什么呢？
难道这些老牌杂志都跟不上潮流了，落后于时代了？

仔细研究了一下JCR报告，才发现了其中的奥秘。总的来说，这3个杂志大幅提高IF的方法无他，唯自引也！

先看PLANT CELL TISS ORG，JCR报告见http://admin-apps.webofknowledge ... PLANT+CELL+TISS+ORG。如下图：
Journal Self Cites
The tables show the contribution of the journal's self cites to its impact factor. This information is also represented in the cited journal graph.
Total Cites 5379
Cites to Years Used in
Impact Factor Calculation 1026
Impact Factor 3.090

Self Cites 1375 (25% of 5379)
Self Cites to Years Used
in Impact Factor Calculation 554 (53% of 1026)
Impact Factor without Self Cites 1.422

自引率达到53％之多，去掉自引后IF只有1.422；

而MOL BIOL REP，JCR报告http://admin-apps.webofknowledge ... ournal=MOL+BIOL+REP
Journal Self Cites
The tables show the contribution of the journal's self cites to its impact factor. This information is also represented in the cited journal graph.
Total Cites 3604
Cites to Years Used in
Impact Factor Calculation 2481
Impact Factor 2.929

Self Cites 1366 (37% of 3604)
Self Cites to Years Used
in Impact Factor Calculation 1153 (46% of 2481)
Impact Factor without Self Cites 1.568

自引率为46％，去掉自引后IF只有1.568；

更离谱的是PLANT MOL BIOL REP，http://admin-apps.webofknowledge ... =PLANT+MOL+BIOL+REP
Journal Self Cites
The tables show the contribution of the journal's self cites to its impact factor. This information is also represented in the cited journal graph.
Total Cites 2239
Cites to Years Used in
Impact Factor Calculation 363
Impact Factor 2.453

Self Cites 276 (12% of 2239)
Self Cites to Years Used
in Impact Factor Calculation 208 (57% of 363)
Impact Factor without Self Cites 1.047

自引率高达57％，去掉自引率后其IF只有1.047；

反观其它老牌杂志，如Planta,http://admin-apps.webofknowledge ... &journal=PLANTA
Journal Self Cites
The tables show the contribution of the journal's self cites to its impact factor. This information is also represented in the cited journal graph.
Total Cites 14779
Cites to Years Used in
Impact Factor Calculation 1314
Impact Factor 3.000

Self Cites 384 (2% of 14779)
Self Cites to Years Used
in Impact Factor Calculation 64 (4% of 1314)
Impact Factor without Self Cites 2.854
自引率只有4％，去掉自引后其IF仍达到2.854，正好是PLANT CELL TISS ORG的两倍，足见JCR的部分IF水分有多高。

随便再举几个杂志，PLANT SCI,http://admin-apps.webofknowledge ... p;journal=PLANT+SCI
Journal Self Cites
The tables show the contribution of the journal's self cites to its impact factor. This information is also represented in the cited journal graph.
Total Cites 9422
Cites to Years Used in
Impact Factor Calculation 963
Impact Factor 2.945

Self Cites 212 (2% of 9422)
Self Cites to Years Used
in Impact Factor Calculation 37 (3% of 963)
Impact Factor without Self Cites 2.832

PLANT PHYSIOLOGY AND BIOCHEMISTRY,
http://admin-apps.webofknowledge ... PLANT+PHYSIOL+BIOCH,

Journal Self Cites
The tables show the contribution of the journal's self cites to its impact factor. This information is also represented in the cited journal graph.
Total Cites 4501
Cites to Years Used in
Impact Factor Calculation 786
Impact Factor 2.838

Self Cites 140 (3% of 4501)
Self Cites to Years Used
in Impact Factor Calculation 27 (3% of 786)
Impact Factor without Self Cites 2.740

.在网友的指点下，又发现了一个惊天杂志：Energy Education Science and Technology
http://admin-apps.webofknowledge ... NERGY+EDUC+SCI+TECH
Journal Self Cites
The tables show the contribution of the journal's self cites to its impact factor. This information is also represented in the cited journal graph.
Total Cites 2992
Cites to Years Used in
Impact Factor Calculation 1964
Impact Factor 31.677

Self Cites 2674 (89% of 2992)
Self Cites to Years Used
in Impact Factor Calculation 1785 (90% of 1964)
Impact Factor without Self Cites 2.887

Journal Immediacy Index
单靠自引，能降一个不到3的杂志提高到31点多，自引率达到90％之多，这是多大的魄力，何等的疯狂！
看到这，大家应该知道有些杂志IF突然升高的奥秘了，我不明白的是，为什么Thomson Reuters 对此置若罔闻呢？这样对那些老老实实的杂志是否不公呢？这样的IF还有什么可信度，还有什么参考价值？

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