Comparison of publication-level approaches to ex-post citation normalization.

Autor/inn/en	Colliander, Cristian; Ahlgren, Per
Titel	Comparison of publication-level approaches to ex-post citation normalization.
Quelle	In: Scientometrics, (2019) 1, S.283-300 PDF als Volltext Verfügbarkeit
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0138-9130
DOI	10.1007/s11192-019-03121-z
Schlagwörter	Algorithmically constructed classification system approach; Citation impact; Field normalization; Item-oriented approach; Research evaluation
Abstract	Abstract In this paper, we compare two sophisticated publication-level approaches to ex-post citation normalization: an item-oriented approach and an approach falling under the general algorithmically constructed classification system approach. Using articles published in core journals in Web of Science (SCIE, SSCI & A&HCI) during 2009 (n = 955,639), we first examine, using the measure Proportion explained variation (PEV), to what extent the publication-level approaches can explain and correct for variation in the citation distribution that stems from subject matter heterogeneity. We then, for the subset of articles from life science and biomedicine (n = 456,045), gauge the fairness of the normalization approaches with respect to their ability to identify highly cited articles when subject area is factored out. This is done by utilizing information from publication-level MeSH classifications to create high quality subject matter baselines and by using the measure Deviations from expectations (DE). The results show that the item-oriented approach had the best performance regarding PEV. For DE, only the most fine-grained clustering solution could compete with the item-oriented approach. However, the item-oriented approach performed better when cited references were heavily weighted in the similarity calculations.
Erfasst von	OLC
Update	2023/2/05