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首页> 外文期刊>The Canadian Journal of Information and Library Science >The Immediacy Index and the Journal Impact Factor: Two Highly Correlated Derived Measures
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The Immediacy Index and the Journal Impact Factor: Two Highly Correlated Derived Measures

机译：即时指数和期刊影响因子：两个高度相关的衍生指标

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摘要

This article investigates the relationship between the journal "impact factor" (IF) and the "immediacy index" (II) in the sciences, as well as the social sciences. It is found that there are highly positive correlations between the IF and the II in most sciences and social sciences disciplines although the correlation strengths vary across disciplines. Moreover, it is found that the II of year Y is also a good predictor for the IF of year Y + 1. These results are strongest for rapidly developing fields, such as biomedicine. Based on the assumption that the citation-age distribution has a Poisson distribution, our empirical data are clarified by a simulation.
机译：本文研究科学和社会科学中期刊“影响因子”（IF）和“即刻指数”（II）之间的关系。发现在大多数科学和社会科学学科中，IF和II之间存在高度正相关，尽管相关强度因学科而异。此外，发现Y年的II也是Y + 1年IF的良好预测指标。这些结果对于快速发展的领域（例如生物医学）最强。基于引用年龄分布具有泊松分布的假设，我们的经验数据通过仿真得到了澄清。

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