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      O fator de impacto do ISI e a avaliação da produção científica: aspectos conceituais e metodológicos Translated title: Impact factor od ISI and evaluation of scientific production: conceptual and methodological aspects

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          Abstract

          Aborda os conceitos e os métodos relacionados com o uso do fator de impacto (FI) do Institute for Scientific Information para avaliação da produção científica publicada em periódicos. Resgata a história do FI, desde sua formulação inicial até tornar-se objeto de inúmeras investigações sobre as diferenças nos valores do indicador nas várias áreas do conhecimento. Destaca que as variáveis que apresentam a maior influência sobre o FI são a densidade e o ritmo de obsolescência dos periódicos. Trata das abordagens sincrônicas e diacrônicas de medir a obsolescência da literatura, como o índice de citação imediata, a meia-vida das citações e o estudo da idade de referências citadas. Conclui com reflexões sobre o sistema de avaliação científica brasileiro e o papel do SciELO na formulação de indicadores bibliométricos.

          Translated abstract

          This paper deals with concepts and methods concerning the use of the Impact Factor (IF), as defined by the Institute for Scientific Information (ISI), on the evaluation of scientific production published in specialized journals. The history of IF is discussed from its first formulation up to the moment when it became the subject of a large amount of investigations regarding the differences among the values for different knowledge areas. It is emphasized that the main variables affecting IF are journal density and their obsolescence rate. The synchronous and diachronous approaches used to measure obsolescence are discussed, such as the immediacy index, half-life of citations and citation age. As a conclusion, the Brazilian system for scientific evaluation is analyzed, as well as the SciELO role on the formulation of bibliometric indicators.

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          Most cited references37

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          Citation Analysis as a Tool in Journal Evaluation: Journals can be ranked by frequency and impact of citations for science policy studies

          R Garfield (1972)
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            Problems of citation analysis: A critical review

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              Journal impact factor: a brief review.

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                Author and article information

                Contributors
                Role: ND
                Journal
                ci
                Ciência da Informação
                Ci. Inf.
                IBICT (Brasília )
                1518-8353
                January 2005
                : 34
                : 1
                : 19-27
                Article
                S0100-19652005000100003
                10.1590/S0100-19652005000100003
                97909103-c90e-4386-9bff-5c89f53ea804

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-1965&lng=en
                Categories
                INFORMATION SCIENCE & LIBRARY SCIENCE

                Information & Library science
                Evaluation of scientific production,Impact factor,Institute for Scientific Information (ISI),Literature density,Literature obsolescence rate,Avaliação da produção científica,Fator de impacto,Densidade dos artigos,Ritmo de obsolescência da literatura

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