A theoretical and methodological comparative study of normalized citation indexes: an application in Brazilian science (1996-2007)

Authors

  • Maria Cláudia Cabrini Grácio Programa de Pós-Graduação em Ciência da Informação da Universidade Estadual Paulista Júlio de Mesquita - UNESP
  • Ely Francina Tannuri Oliveira Programa de Pós-Graduação em Ciência da Informação da Universidade Estadual Paulista Júlio de Mesquita - UNESP

Keywords:

Theoretical-methodological study. Citation indexes. Normalized citation indexes.

Abstract

This study aims to present, analyze and compare the results of applying three normalization procedures on the index of citations per document: normalized by the overall mean, median and the mean of the 10% most productive in the area, in the universe of Brazilian science in the 27 areas of knowledge presented by Scopus. From the data obtained on SCImago Journal & Country Rankings for the 27 areas, we calculated Ma, Md and Ma10% of the number of citations per document for the set of countries. Next, for each area, we calculated the normalized index of Brazil by the overall mean (INma), median (INmd) and the mean of the 10% most productive countries (INma10%). It was concluded that normalization procedures present results with fewer biases and are more representative of the actual performance of the area in relation to its peers when comparing different areas of knowledge. This is the major contribution of normalized indicators pointed out by this research.

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Author Biographies

Maria Cláudia Cabrini Grácio, Programa de Pós-Graduação em Ciência da Informação da Universidade Estadual Paulista Júlio de Mesquita - UNESP

Mestre em Estatística e Doutora em Lógica, pela Universidade Estadual de Campinas. Professor Assistente Doutor do Programa de Pós-Graduação em Ciência da Informação da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP. Pesquisa nas áreas de Bibliometria e Cientometria, especialmente nas temáticas análise de cocitação e indicadores bibliométricos.

Ely Francina Tannuri Oliveira, Programa de Pós-Graduação em Ciência da Informação da Universidade Estadual Paulista Júlio de Mesquita - UNESP

Livre docente em Estudos Métricos da Informação pela Universidade Estadual Paulista. Docente do Programa de Pós-Graduação em Ciência da Informação da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP. Pesquisa nas áreas de Bibliometria e Cientometria, especialmente nas temáticas análise de cocitação e indicadores bibliométricos.Corrdenadora do GP Estudos Métricos da Informação e Pesquisadora CNPq(2)

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Published

2014-12-22

How to Cite

GRÁCIO, M. C. C.; OLIVEIRA, E. F. T. A theoretical and methodological comparative study of normalized citation indexes: an application in Brazilian science (1996-2007). Em Questão, Porto Alegre, v. 20, n. 3, p. 8–26, 2014. Disponível em: https://seer.ufrgs.br/index.php/EmQuestao/article/view/49200. Acesso em: 24 jun. 2025.

Issue

Vol. 20 No. 3 (2014)

Section

Article

License

Copyright (c) 2014 Maria Cláudia Cabrini Grácio, Ely Francina Tannuri Oliveira

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