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arXiv 0911.2632cs.DLcs.IR
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科技期刊语境引用影响力的测量

Measuring contextual citation impact of scientific journals

Henk F. Moed

摘要:

本文提出了一种新的期刊引文影响力指标--源标准化每篇影响力(SNIP)。它衡量期刊的上下文引用影响,考虑到其适当定义的学科领域的特点,特别是作者在参考文献列表中引用其他论文的频率,引用影响成熟的速度,以及用于评估的数据库覆盖该领域文献的程度。它进一步发展了尤金加菲尔德的概念,一个领域的“引用潜力”定义为在一个领域的参考文献列表的平均长度,并确定被引用的概率,并需要在公平的性能评估,以纠正学科领域之间的差异。期刊的主题领域被定义为引用该期刊的论文集。SNIP被定义为期刊每篇论文的引用数与其学科领域的引用潜力之比。它的目的是允许直接比较不同学科领域的来源。引文潜力不仅在期刊主题类别(共享研究领域的期刊分组)或学科(例如,数学、工程和社会科学期刊的价值往往低于生命科学期刊的价值),但同一学科类别内的期刊之间也存在这种情况。例如,基础期刊往往比应用或临床期刊显示出更高的引用潜力,涵盖新兴主题的期刊比经典学科或更一般的期刊更高。SNIP纠正了这种差异。它的优点和局限性进行了批判性的讨论,并提出了进一步研究的建议。所有的实验结果都来自Elsevier的Scopus。

英文摘要:

This paper explores a new indicator of journal citation impact, denoted as source normalized impact per paper (SNIP). It measures a journal's contextual citation impact, taking into account characteristics of its properly defined subject field, especially the frequency at which authors cite other papers in their reference lists, the rapidity of maturing of citation impact, and the extent to which a database used for the assessment covers the field's literature. It further develops Eugene Garfield's notions of a field's 'citation potential' defined as the average length of references lists in a field and determining the probability of being cited, and the need in fair performance assessments to correct for differences between subject fields. A journal's subject field is defined as the set of papers citing that journal. SNIP is defined as the ratio of the journal's citation count per paper and the citation potential in its subject field. It aims to allow direct comparison of sources in different subject fields. Citation potential is shown to vary not only between journal subject categories - groupings of journals sharing a research field - or disciplines (e.g., journals in mathematics, engineering and social sciences tend to have lower values than titles in life sciences), but also between journals within the same subject category. For instance, basic journals tend to show higher citation potentials than applied or clinical journals, and journals covering emerging topics higher than periodicals in classical subjects or more general journals. SNIP corrects for such differences. Its strengths and limitations are critically discussed, and suggestions are made for further research. All empirical results are derived from Elsevier's Scopus.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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