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【目的】以SSCI信息科学和图书馆学期刊为例,探讨不同引证时间窗口影响因子对期刊排序的影响。【方法】以2004—2014年历年均被SSCI收录的35种信息科学与图书馆学期刊为研究对象,计算各刊2IF至10IF,结合被引高峰,得出学科最适引证时间窗口影响因子,并以此为基础对35种期刊排序,将各刊其余引证时间窗口影响因子期刊排序与之做Spearman秩相关分析。【结果】35种期刊被引高峰到来的时间平均为6.25年,故7IF为最适影响因子。相关性分析结果表明,不同引证时间窗口影响因子期刊排序间具有较高一致性,2IF与7IF的相关系数为0.987,低于5IF与7IF的相关系数0.993。【结论】对于信息科学与图书馆学期刊来说,不同引证时间窗口影响因子在期刊排序间具有较高的一致性。
【Objective】 Taking the SSCI information science and library science journals as an example, this paper discusses the influence of different citation time windows on the ordering of influencing factors. 【Method】 With 35 journals of Information Science and Library Science, which were all included in the SSCI from 2004 to 2014, as the research object, 2IF to 10IF of each period were calculated, and the influencing factors of the most suitable citation time window of the discipline were obtained. Based on this, 35 kinds of journals were ranked, and Spearman rank correlation analysis was performed with the other journals ranking the time window influencing factors. 【Result】 The average arrival time of 35 journals reached 6.25 years, so 7IF was the most suitable influential factor. The results of correlation analysis showed that there was a high consistency among the journals with different citation time windows, the correlation coefficient between 2IF and 7IF was 0.987, which was lower than the correlation coefficient between 5IF and 7IF 0.993. 【Conclusion】 For information science and library science journals, the influential factors of different citation time windows have higher consistency among periodicals.