In this paper, we compare the distribution of Elsevier Scopus subject areas of authors’ documents, their bibliographical references and their citing documents. We compute the complement of the Herfindahl–Hirschman index as a measure of multidisciplinarity. We analyse a sample of 120 researchers belonging to two groups, one from the Italian Institute of Technology (IIT, whose work is expected to be highly multidisciplinary) and one from the National Institute for Nuclear Physics (INFN, whose work is expected to be much less multidisciplinary). We show that the two groups are distinguishable through the measured index values. By using the subject areas of authors’ bibliographical references we obtain a better identification of the two groups than relying on the subject areas of the author’s documents. We then extend the analysis to 3317 researchers belonging to seven Italian Scientific-Disciplinary sectors (SSD) providing insights about the degree of multidisciplinarity within each SSD. The results seem interesting for assessing the multidisciplinarity of younger researchers with scarce scientific output and few citations.

中文翻译：

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基于作者文献、参考书目和施引论文的 Scopus 学科领域多样性的三个多学科指数比较

在本文中，我们比较了作者文献、参考书目和引用文献的 Elsevier Scopus 学科领域的分布。我们计算 Herfindahl-Hirschman 指数的补充作为多学科性的衡量标准。我们分析了属于两组的 120 名研究人员的样本，一组来自意大利理工学院（IIT，其工作预计将具有高度的多学科性），另一组来自国家核物理研究所（INFN，其工作预计将有很多少跨学科）。我们表明，通过测量的指数值可以区分这两组。通过使用作者参考文献的主题领域，我们可以比依赖作者文档的主题领域更好地识别这两个群体。然后，我们将分析扩展到属于七个意大利科学学科部门 (SSD) 的 3317 名研究人员，提供有关每个 SSD 内多学科程度的见解。对于评估科学产出稀少且引文很少的年轻研究人员的多学科性，结果似乎很有趣。