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22
A Global Map of Science Based on the ISI Subject Categories
, 2007
"... The ISI subject categories classify journals included in the Science Citation Index (SCI). The aggregated journal-journal citation matrix contained in the Journal Citation Reports can be aggregated on the basis of these categories. This leads to an asymmetrical transaction matrix (citing versus cite ..."
Abstract
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Cited by 45 (11 self)
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The ISI subject categories classify journals included in the Science Citation Index (SCI). The aggregated journal-journal citation matrix contained in the Journal Citation Reports can be aggregated on the basis of these categories. This leads to an asymmetrical transaction matrix (citing versus cited) which is much more densely populated than the underlying matrix at the journal level. Exploratory factor analysis leads us to opt for a fourteen-factor solution. This solution can easily be interpreted as the disciplinary structure of science. The nested maps of science (corresponding to 14 factors, 172 categories, and 6,164 journals) are brought online at
Betweenness Centrality” as an Indicator of the “Interdisciplinarity” of Scientific Journals
- Journal of the American Society for Information Science and Technology
, 2006
"... In addition to science citation indicators of journals like impact and immediacy, social network analysis provides a set of centrality measures like degree, betweenness, and closeness centrality. These measures are first analyzed for the entire set of 7,379 journals included in the Journal Citation ..."
Abstract
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Cited by 45 (10 self)
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In addition to science citation indicators of journals like impact and immediacy, social network analysis provides a set of centrality measures like degree, betweenness, and closeness centrality. These measures are first analyzed for the entire set of 7,379 journals included in the Journal Citation Reports of the Science Citation Index and the Social Sciences Citation Index 2004, and then also in relation to local citation environments which can be considered as proxies of specialties and disciplines. Betweenness centrality is shown to be an indicator of the interdisciplinarity of journals, but only in local citation environments and after normalization because otherwise the influence of degree centrality (size) overshadows the betweenness-centrality measure. The indicator is applied to a variety of citation environments, including policy-relevant ones like biotechnology and nanotechnology. The values of the indicator remain sensitive to the delineations of the set because of the indicator’s local character. Maps showing 1 interdisciplinarity of journals in terms of betweenness centrality can be drawn using information about journal citation environments which is available online.
Caveats for the Use of Citation Indicators in Research and Journal Evaluations
"... Ageing of publications, percentage of self-citations, and impact vary from journal to journal within fields of science. The assumption that citation and publication practices are homogenous within specialties and fields of science is invalid. Furthermore, the delineation of fields and among specialt ..."
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Cited by 35 (14 self)
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Ageing of publications, percentage of self-citations, and impact vary from journal to journal within fields of science. The assumption that citation and publication practices are homogenous within specialties and fields of science is invalid. Furthermore, the delineation of fields and among specialties is fuzzy. Institutional units of analysis and persons may move between fields or span different specialties. The match between the citation index and institutional profiles varies among institutional units and nations. The respective matches may heavily affect the representation of the units. Non-ISI journals are increasingly cornered into “transdisciplinary ” Mode-2 functions with the exception of specialist journals publishing in languages other than English. An “externally cited impact factor ” can be calculated for these journals. The citation impact of non-ISI journals will be demonstrated using Science and Public Policy as the example.
Can scientific journals be classified in terms of aggregated journal–journal citation relations using the journal citation reports?
- Journal of the American Society for Information Science and Technology,
, 2006
"... ..."
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Visualization of the citation impact environments of scientific journals: an online mapping exercise
- Journal of the American Society for Information Science and Technology
, 2007
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The intellectual structure of consumer research: A bibliometric study of author cocitations in the first 15 years of the Journal of Consumer Research
- Journal of Consumer Research
, 1993
"... This study explores the analysis of citations in the Journal of Consumer Research (JCR) during its first 15 years of publication. We review previous work on citation analysis in marketing and consumer research, and we argue for the value of a more complex approach based on patterns of cocitation. To ..."
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Cited by 14 (0 self)
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This study explores the analysis of citations in the Journal of Consumer Research (JCR) during its first 15 years of publication. We review previous work on citation analysis in marketing and consumer research, and we argue for the value of a more complex approach based on patterns of cocitation. Toward this end, we develop a data base that draws on the work of the 42 most frequently published authors in JCR in the first 15 years. We introduce a new, two-stage procedure to investigate the underlying structure in the from-versus-to or citing-cited matrix based on numbers of references among these authors. Our procedure yields a scale of citing-cited asymmetry for the 42 consumer researchers, a "citation-similarity space " showing patterns of symmetric citation among the researchers, and measures of research atypicality. These separate yet complementary results give interesting insights into patterns of cocitation among consumer behavior researchers and thereby appear to reflect the intellectual structure of consumer research. T he development, dissemination, and utilization of knowledge in any academic field of inquiry de-pends on the circulation of ideas through the publica-
Aging, obsolescence, impact, growth and utilization: definitions and relations
"... The notions aging, obsolescence, impact, growth, utilization and their relations are studied. It is shown how to correct an observed citation distribution for growth, once the growth distribution is known. The relation of this correction procedure with the calculation of impact measures is explained ..."
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Cited by 12 (4 self)
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The notions aging, obsolescence, impact, growth, utilization and their relations are studied. It is shown how to correct an observed citation distribution for growth, once the growth distribution is known. The relation of this correction procedure with the calculation of impact measures is explained. More interestingly, we have shown how the influence of growth on aging can be studied over a complete period as a whole. Here the difference between the so-called average and global aging distributions is the main factor. Our main result is that growth can influence aging but that it does not cause aging. A short overview of some classical articles on this topic is given. Results of these earlier works are placed in the framework set up in this article.
to be published
- in the Proceedings of the 7 th Workshop on Advanced Accelerator Concepts, Lake Tahoe, CA, LBNL-40004
, 1996
"... On behalf of: ..."
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Can Networks of Journal-Journal Citation be used as Indicators of Change in the Social Sciences
- Journal of Documentation
, 2003
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