van Raan Anthony F J
Centre for Science and Technology Studies, Leiden University, Wassenaarseweg 52, P.O. Box 9555, 2300 RB Leiden, The Netherlands.
Scientometrics. 2012 Aug;92(2):457-469. doi: 10.1007/s11192-012-0747-0. Epub 2012 Apr 25.
In this paper we present a compilation of journal impact properties in relation to other bibliometric indicators as found in our earlier studies together with new results. We argue that journal impact, even calculated in a sufficiently advanced way, becomes important in evaluation practices based on bibliometric analysis only at an aggregate level. In the relation between average journal impact and actual citation impact of groups, the influence of research performance is substantial. Top-performance as well as lower performance groups publish in more or less the same range of journal impact values, but top-performance groups are, on average, more successful in the entire range of journal impact. We find that for the high field citation-density groups a larger size implies a lower average journal impact. For groups in the low field citation-density regions however a larger size implies a considerably higher average journal impact. Finally, we found that top-performance groups have relatively less self-citations than the lower performance groups and this fraction is decreasing with journal impact.
在本文中，我们展示了与其他文献计量指标相关的期刊影响力属性汇编，这些指标来自我们早期的研究以及新的研究结果。我们认为，即使以足够先进的方式计算，期刊影响力在基于文献计量分析的评估实践中，仅在总体层面才变得重要。在期刊平均影响力与各群体实际被引影响力之间的关系中，研究表现的影响很大。高绩效群体和低绩效群体发表的期刊影响力值范围大致相同，但高绩效群体在整个期刊影响力范围内平均更成功。我们发现，对于高领域被引密度群体而言，规模越大意味着平均期刊影响力越低。然而，对于低领域被引密度区域的群体，规模越大意味着平均期刊影响力显著更高。最后，我们发现高绩效群体的自引相对低于低绩效群体，且这一比例随期刊影响力而降低。
