,What does the Web of Science five-year synchronous impact factor have to offer?

• 作 者: Ronald Rousseau
• 机 构: Industrial Sciences and Technology, KHBO (Association K.U. Leuven),IBW, University of Antwerp,Depart
• 出 处: Chinese Journal of Library and Information Science
• 发表日期: 2009年03期
• 关键词: Synchronous impact factor Wilcoxon matched-pairs Signed-ranks test

With a random sample of 10 JCR(Science)subject areas it is shown that the2-year and the 5-year impact factor of journals lead statistically to the same ranking per category.Yet in a majority of cases,the 5-year impact factor is larger than the 2-year one.

With a random sample of 10 JCR (Science) subject areas it is shown that the 2-year and the 5-year impact factor of journals lead statistically to the same ranking category. Yet in a majority of cases, the 5-year impact factor is larger than the 2-year one.