The Center for Science and Technology Studies at Leiden University advocates the use of specific normalizations for assessing research performance with reference to a world average. The Journal Citation Score (JCS) and Field Citation Score (FCS) are averaged for the research group or individual researcher under study, and then these values are used as denominators of the (mean) Citations per publication (CPP). Thus, this normalization is based on dividing two averages. This procedure only generates a legitimate indicator in the case of underlying normal distributions. Given the skewed distributions under study, one should average the observed versus expected values which are to be divided first for each publication. We show the effects of the Leiden normalization for a recent evaluation where we happened to have access to the underlying data.
翻译:Leiden大学科学和技术研究中心提倡使用具体的正常化标准,参照世界平均水平评估研究业绩。《日记分》和《实地评分》是研究小组或研究中个人研究人员的平均数,然后这些数值作为每份出版物(平均)引用的分母。因此,这种正常化的基础是将平均值分成两个。这一程序只有在正常分布基础的情况下才产生合法指标。鉴于研究中的分布偏斜,应该将每份出版物的观察值与预期值平均分之一。我们为最近的评估展示了Liden正常化的影响,即我们碰巧有机会获得基本数据。