SCI收录期刊的影响因子与2年自被引率的历年变化与分析——兼谈加菲尔德期刊自引率论断的时效性
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摘要
【目的】全面揭示SCI收录期刊的影响因子(Impact Factor,IF)与2年自被引率(Self-Cited Rate,SCR2) 20年来的变化趋势,从宏观上考察SCI收录期刊的自引情况。【方法】以1997—2016年SCI收录期刊为研究对象,以IF与SCR2为评价指标,考察IF与SCR2之间的相关性,分别绘制IF、SCR2的平均值与中位数的年度折线图。【结果】SCI收录期刊的IF与SCR2呈显著负相关,各年度的相关系数平均值为-0. 276; 1997—2016年IF的平均值与中位数整体呈逐年上升的趋势,20年间分别上升了90. 4%和134. 2%; 1997—2016年SCR2的平均值与中位数整体呈逐年下降的趋势,20年间分别下降了33.0%和38. 3%; 1997—2016年SCR2≥0. 2、SCR2≥0. 3、SCR2≥0. 4与SCR2≥0. 5的期刊数量占比也均呈逐年下降的趋势,20年间分别下降了48. 6%、59. 1%、66. 5%、70. 4%。【结论】从宏观上讲,SCI收录期刊中高IF期刊的IF并不依赖于期刊自引;随着时间的推移,期刊自引对SCI收录期刊IF的贡献越来越小;检测期刊自引程度的自被引率(Self-Cited Rate,SCR)与SCR2的标准值应随着时间的推移作适当的修正。
[Purposes] This paper aims to entirely reveal the changing trend of impact factors( IF) and two-year self-cited rates( SCR2) of SCI journals over 20 years,and examine the self-citation of SCI journals from a macro perspective. [Methods]Selecting SCI journals from 1997 to 2016 as the research objects,IF and SCR2 were used as the evaluation indexes to investigate the correlation between IF and SCR2,and to drawthe annual line charts of the average and median of IF and SCR2,respectively.[Findings]The IF of SCI journals has significant negative correlation with SCR2,and the average value of correlation coefficient of each year is-0. 276. The average value and median of IF from 1997 to 2016 showan increasing trend year by year in general,with an increase of 90. 4% and 134. 2% in 20 years,respectively. However,the average value and median of SCR2 showa decreasing trend year by year,with a decrease of 33. 0% and 38. 3% in 20 years,respectively. The proportion of journals,of which SCR2 from 1997 to 2016 is equal to or larger than 0. 2,0. 3,0. 4 and 0. 5,also shows a decreasing trend by years,with a decrease of48. 6%,59. 1%,66. 5%,and 70. 4% in 20 years,respectively. [Conclusions]Macroscopically speaking,the IF of SCI journals with higher IF does not mainly depend on journal self-citation. As time goes by,the contribution of journal self-citation to IF of SCI journals becomes smaller and smaller. The standard values of SCR and SCR2 for measuring the degree of self-citation of journals should be corrected appropriately over time.
[Purposes] This paper aims to entirely reveal the changing trend of impact factors( IF) and two-year self-cited rates( SCR2) of SCI journals over 20 years,and examine the self-citation of SCI journals from a macro perspective. [Methods]Selecting SCI journals from 1997 to 2016 as the research objects,IF and SCR2 were used as the evaluation indexes to investigate the correlation between IF and SCR2,and to drawthe annual line charts of the average and median of IF and SCR2,respectively.[Findings]The IF of SCI journals has significant negative correlation with SCR2,and the average value of correlation coefficient of each year is-0. 276. The average value and median of IF from 1997 to 2016 showan increasing trend year by year in general,with an increase of 90. 4% and 134. 2% in 20 years,respectively. However,the average value and median of SCR2 showa decreasing trend year by year,with a decrease of 33. 0% and 38. 3% in 20 years,respectively. The proportion of journals,of which SCR2 from 1997 to 2016 is equal to or larger than 0. 2,0. 3,0. 4 and 0. 5,also shows a decreasing trend by years,with a decrease of48. 6%,59. 1%,66. 5%,and 70. 4% in 20 years,respectively. [Conclusions]Macroscopically speaking,the IF of SCI journals with higher IF does not mainly depend on journal self-citation. As time goes by,the contribution of journal self-citation to IF of SCI journals becomes smaller and smaller. The standard values of SCR and SCR2 for measuring the degree of self-citation of journals should be corrected appropriately over time.
引文
[1]刘雪立.全球性SCI现象和影响因子崇拜[J].中国科技期刊研究,2012,23(2):185-190.
[2]王凌峰,叶涯剑.期刊影响因子操纵行为及抑制策略[J].编辑学报,2012,24(6):567-570.
[3] Chorus C G. The practice of strategic journal self-citation:It exists,and should stop(a note from the editor-in-chief)[J].European Journal of Transport and Infrastructure Research,2015,15(3):274-281.
[4] Fassoulaki A,Paraskeva A,Papilas K,et al. Self-citations in six anaesthesia journals and their significance in determining the impact factor[J]. British Journal of Anaesthesia,2000,84(2):266-269.
[5]金铁成.学术期刊的自引证率与自被引率的比较与分析———以食品科技类SCI来源期刊为例[J].中国科技期刊研究,2016,27(10):1090-1093.
[6]刘雪立,周志新,方红玲,等. 2005—2007年我国医学期刊自引率与过度自引的界定[J].中国科技期刊研究,2009,20(4):624-626.
[7]徐自超. 2005—2007年我国自然科学类期刊自引率统计分析[J].中国科技期刊研究,2010,21(6):794-796.
[8]刘昌来,吴祝华,田亚玲,等.大数据下初步分析我国期刊自引情况[J].科技与出版,2017(3):94-97.
[9]刘雪立,方红玲,王梅英,等. 2009年7347种SCIE期刊文献计量学指标统计分析[J].中国科技期刊研究,2011,22(1):44-52.
[10]金铁成.采用自被引率与2年自被引率检测学术期刊过度自引的比较与分析[J].中国科技期刊研究,2016,27(9):949-952.
[11]刘雪立,魏雅慧,盛丽娜,等.科技期刊总被引频次和影响因子构成中的自引率比较———兼谈影响因子的人为操纵倾向[J].编辑学报,2017,29(6):602-606.
[12]盛丽娜.我国SCI收录期刊影响因子相关自被引率的国际比较[J].中国科技期刊研究,2018,29(1):69-74.
[13]盛丽娜.基于JCR 6门学科的影响因子相关自被引率分析[J].中国科技期刊研究,2018,29(3):291-295.
[14] Title suppressions[EB/OL].[2018-09-08]. http:∥ipscience-help. thomsonreuters. com/incitesLiveJCR/JCRGroup/title Suppressions. html.
[15] Krauss J. Journal self-citation rates in ecological sciences[J].Scientometrics,2007,73(1):79-89.
[16]马峥.通过计量指标分析发现操纵期刊评价结果的行为[J].编辑学报,2016,28(6):608-611.
[17] Chorus C,Waltman L. A large-scale analysis of impact factor biased journal self-citations[J]. PLoS ONE,2016,11(8):e0161021.
[18] Mc Veigh M E. Journal self-citation in the Journal Citation Reports-Science Edition(2002)[EB/OL].[2018-09-08].https:∥clarivate. com/essays/journal-self-citation-jcr/.
[19]金铁成.此自引率非彼自引率———学术期刊的自引证率与自被引率错引举隅[J].编辑学报,2016,28(3):251-252.
[20]金铁成.是自引证率,还是自被引率?———对加菲尔德的期刊自引率论断的考证[J].中国科技期刊研究,2016,27(7):704-707.
[21]诸平,顾洪溪.汤森路透镇压期刊的统计与分析———兼议人为操作期刊引文乱象[J].宝鸡文理学院学报(自然科学版),2016,36(4):68-78.
[22]宋立臣,范建玮. JCR暂停发布SCI收录期刊引证指标的原因探析[J].编辑学报,2016,28(3):304-306.
[23] Testa J. Journal selection process[EB/OL].[2018-09-08].https:∥clarivate. com/essays/journal-selection-process/.
[24] Testa J. The Thomson Scientific journal selection process[J].International Microbiology,2006,9:135-138.
[2]王凌峰,叶涯剑.期刊影响因子操纵行为及抑制策略[J].编辑学报,2012,24(6):567-570.
[3] Chorus C G. The practice of strategic journal self-citation:It exists,and should stop(a note from the editor-in-chief)[J].European Journal of Transport and Infrastructure Research,2015,15(3):274-281.
[4] Fassoulaki A,Paraskeva A,Papilas K,et al. Self-citations in six anaesthesia journals and their significance in determining the impact factor[J]. British Journal of Anaesthesia,2000,84(2):266-269.
[5]金铁成.学术期刊的自引证率与自被引率的比较与分析———以食品科技类SCI来源期刊为例[J].中国科技期刊研究,2016,27(10):1090-1093.
[6]刘雪立,周志新,方红玲,等. 2005—2007年我国医学期刊自引率与过度自引的界定[J].中国科技期刊研究,2009,20(4):624-626.
[7]徐自超. 2005—2007年我国自然科学类期刊自引率统计分析[J].中国科技期刊研究,2010,21(6):794-796.
[8]刘昌来,吴祝华,田亚玲,等.大数据下初步分析我国期刊自引情况[J].科技与出版,2017(3):94-97.
[9]刘雪立,方红玲,王梅英,等. 2009年7347种SCIE期刊文献计量学指标统计分析[J].中国科技期刊研究,2011,22(1):44-52.
[10]金铁成.采用自被引率与2年自被引率检测学术期刊过度自引的比较与分析[J].中国科技期刊研究,2016,27(9):949-952.
[11]刘雪立,魏雅慧,盛丽娜,等.科技期刊总被引频次和影响因子构成中的自引率比较———兼谈影响因子的人为操纵倾向[J].编辑学报,2017,29(6):602-606.
[12]盛丽娜.我国SCI收录期刊影响因子相关自被引率的国际比较[J].中国科技期刊研究,2018,29(1):69-74.
[13]盛丽娜.基于JCR 6门学科的影响因子相关自被引率分析[J].中国科技期刊研究,2018,29(3):291-295.
[14] Title suppressions[EB/OL].[2018-09-08]. http:∥ipscience-help. thomsonreuters. com/incitesLiveJCR/JCRGroup/title Suppressions. html.
[15] Krauss J. Journal self-citation rates in ecological sciences[J].Scientometrics,2007,73(1):79-89.
[16]马峥.通过计量指标分析发现操纵期刊评价结果的行为[J].编辑学报,2016,28(6):608-611.
[17] Chorus C,Waltman L. A large-scale analysis of impact factor biased journal self-citations[J]. PLoS ONE,2016,11(8):e0161021.
[18] Mc Veigh M E. Journal self-citation in the Journal Citation Reports-Science Edition(2002)[EB/OL].[2018-09-08].https:∥clarivate. com/essays/journal-self-citation-jcr/.
[19]金铁成.此自引率非彼自引率———学术期刊的自引证率与自被引率错引举隅[J].编辑学报,2016,28(3):251-252.
[20]金铁成.是自引证率,还是自被引率?———对加菲尔德的期刊自引率论断的考证[J].中国科技期刊研究,2016,27(7):704-707.
[21]诸平,顾洪溪.汤森路透镇压期刊的统计与分析———兼议人为操作期刊引文乱象[J].宝鸡文理学院学报(自然科学版),2016,36(4):68-78.
[22]宋立臣,范建玮. JCR暂停发布SCI收录期刊引证指标的原因探析[J].编辑学报,2016,28(3):304-306.
[23] Testa J. Journal selection process[EB/OL].[2018-09-08].https:∥clarivate. com/essays/journal-selection-process/.
[24] Testa J. The Thomson Scientific journal selection process[J].International Microbiology,2006,9:135-138.