Making an impact: The rise of the impact factor as a measure of journal quality

Leff, D.R.

doi:10.1016/j.jada.2004.11.020

Cited by 22 publications

(15 citation statements)

References 1 publication

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“…Within this context, impact factors are used by committees responsible for appointment, promotion or tenure (Broome, 2005;Calza & Garbisa, 1995;Leff, 2005), as well as for resource and staff allocation (Taubes, 1993;Vinkler, 1986), as a highly objective and appropriate indicator of scientific value. However, many problems associated with impact factor and its use as a tool in the evaluation of journals, papers and researchers, have been pointed out.…”

Section: Introductionmentioning

confidence: 99%

Impact factor and education journals: a critical examination and analysis

Togia

Tsigilis

2006

International Journal of Educational Research

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Section: Introductionmentioning

confidence: 99%

Impact factor and education journals: a critical examination and analysis

Togia

Tsigilis

2006

International Journal of Educational Research

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“…Assim, o fator de impacto, que é visto como um indicador da visibilidade e difusão de conhecimento científico, é basicamente uma razão entre citações e itens publicados passíveis de citação. Sua força reside sobretudo na abrangência, estabilidade e aparente reprodutibilidade; por outro lado, algumas falhas óbvias, junto com seu uso leviano, provocaram uma torrente de críticas e discussões controversas sobre sua exatidão 6,[8][9][10][11][12][13][14][15][16][17] . A Thomson Scientific, antes conhecida por Institute for Scientific Information (ISI), calcula e publica, no Journal Citation Reports, o fator de impacto dos 7.500 periódicos mais citados do mundo, que empregam a revisão por pares, em aproximadamente 200 áreas.…”

Section: Introductionunclassified

Brazilian knowledge production in the field of child and adolescent health

Blank¹,

Rosa²,

Gurgel³

et al. 2006

J Pediatr (Rio J)

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Objectives: To assess (a) the trend of MEDLINE citation of pediatrics articles associated with Brazilian institutions from 1990 through 2004; (b) the number of Brazilian pediatrics articles published in journals with the highest impact factor; and (c) the regional distribution of institutions.Methods: PubMed search limited to ages 0 to 18 years, English language, MEDLINE and humans subsets, Brazilian affiliation. For each year, we compared the articles retrieved to the whole of MEDLINE citations with the same search limits, except for affiliation, as well as to the total Brazilian scientific production cited in MEDLINE, without age limits. We made a descriptive analysis, and used the chi-square test for trend. Data concerning publication in journals with the highest impact factor were aggregated into three-year periods.Results: A total of 7,222 Brazilian pediatrics articles were listed in MEDLINE from 1990 through 2004, corresponding to 0.95% of all articles concerning the age group from 0 to 18 years. There was a fivefold increase in the absolute number of Brazilian articles along the study period. The ratio of Brazilian to total articles increased from 0.51 to 1.60% (p < 0.01). Scientific knowledge production remains strongly concentrated in the Southeast of Brazil.Conclusion: Brazilian research activities in pediatrics have had a steady upward trend, which relates to the proportional growth of the Brazilian scientific production as a whole.J Pediatr (Rio J). 2006;82(2):97-102: Knowledge production, pediatric research, bibliometrics, impact factor. ResumoObjetivos: Verificar (a) a tendência das citações de artigos de pediatria oriundos de instituições brasileiras, no MEDLINE, de 1990 até 2004; (b) o número de artigos publicados em periódicos com os maiores fatores de impacto; e (c) a distribuição regional das instituições.Métodos: Busca no PubMed com os seguintes limites: idade de 0 a 18 anos, língua inglesa, subconjuntos MEDLINE e humanos, afiliação brasileira. Para cada ano, comparamos os artigos encontrados com o total de citações no MEDLINE, obedecendo aos mesmos limites de busca, com exceção da afiliação; o mesmo foi feito com o total da produção científica brasileira citada no MEDLINE, sem limites de idade. Realizamos uma análise descritiva, usando o teste qui-quadrado para a tendência. Agregamos os dados relativos à publicação em periódicos com os maiores fatores de impacto em períodos de 3 anos. Resultados:Entre 1990 e 2004, o MEDLINE citou 7.222 artigos de pediatria brasileiros, correspondendo a 0,95% de todos os artigos tratando da faixa etária de 0 a 18. O número absoluto de artigos brasileiros aumentou cinco vezes durante esse período. A fração de artigos brasileiros em relação ao número total de artigos aumentou de 0,51 a 1,60% (p < 0,01). A produção científica permanece fortemente concentrada na Região Sudeste do Brasil.Conclusão: As atividades brasileiras de pesquisa em pediatria demonstram uma tendência ascendente constante, proporcional ao crescimento de toda a produção científica bras...

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“…First of all, many have pointed out that counting citations is a flawed way to appraise academic worth, among other reasons because it does not measure citations to any single article. [20][21][22][23][24][25] Second, if an article is cited frequently as an example of poor research, it will nevertheless raise the journals impact factor. In addition, journals with a print version in a language other than English will hardly get coverage from organizations like Thomson-ISI, allegedly because their impact factor is too low which is probably the case, since international readers will most likely not cite articles published in a language that they cannot read.…”

Section: Discussionmentioning

confidence: 99%