A further step forward in measuring journals' scientific prestige: The SJR2 indicator
A further step forward in measuring journals' scientific prestige: The SJR2 indicator
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DOI：
10.1016/j.joi.2012.07.001
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发表时间：
2012-10-01
影响因子：
3.7
通讯作者：
Moya-Anegon, Felix
中科院分区：
文献类型：
--
作者：
Guerrero-Bote, Vicente P.;Moya-Anegon, Felix
提出了一种新的不依赖于期刊规模的学术期刊声誉评价指标SJR 2。该指标不仅考虑到引用科学期刊的声望，而且还考虑到它与被引用期刊的接近程度，使用两种期刊引文概况向量之间的余弦角。为了消除规模效应，将累积的声望除以期刊可引用文献的比例，从而消除了这种指标的下降趋势，并赋予分数以意义。它的计算方法进行了描述，并将其在Scopus 2008数据集上的实施结果与特设期刊影响因子，JIF（3y）和SNIP的结果进行了比较，该比较是在整体和特定科学领域内进行的。所有这三个，SJR 2指标，SNIP指标和JIF分布，被发现很好地拟合对数律。虽然这三个指标密切相关，但排名发生了重大变化。此外，按学科领域划分，SJR 2的分布比JIF更均衡，几乎与SNIP一样均衡，并且在较低水平的特定学科领域中优于两者。余弦的加入增加了主题相近的期刊之间声望流动的价值。(C)2012爱思唯尔有限公司版权所有。
A new size-independent indicator of scientific journal prestige, the SJR2 indicator, is proposed. This indicator takes into account not only the prestige of the citing scientific journal but also its closeness to the cited journal using the cosine of the angle between the vectors of the two journals' cocitation profiles. To eliminate the size effect, the accumulated prestige is divided by the fraction of the journal's citable documents, thus eliminating the decreasing tendency of this type of indicator and giving meaning to the scores. Its method of computation is described, and the results of its implementation on the Scopus 2008 dataset is compared with those of an ad hoc Journal Impact Factor, JIF(3y), and SNIP, the comparison being made both overall and within specific scientific areas. All three, the SJR2 indicator, the SNIP indicator and the JIF distributions, were found to fit well to a logarithmic law. Although the three metrics were strongly correlated, there were major changes in rank. In addition, the SJR2 was distributed more equalized than the JIF by Subject Area and almost as equalized as the SNIP, and better than both at the lower level of Specific Subject Areas. The incorporation of the cosine increased the values of the flows of prestige between thematically close journals. (C) 2012 Elsevier Ltd. All rights reserved.