-
Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001)
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- Date
- 16. 8.2002 12:31:47
22. 7.2006 15:22:28
-
Hayer, L.: Lazarsfeld zitiert : eine bibliometrische Analyse (2008)
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- Date
- 22. 6.2008 12:54:12
-
Nicolaisen, J.: Citation analysis (2007)
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- Date
- 13. 7.2008 19:53:22
-
Ahlgren, P.; Jarneving, B.; Rousseau, R.: Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient (2003)
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- Abstract
- Ahlgren, Jarneving, and. Rousseau review accepted procedures for author co-citation analysis first pointing out that since in the raw data matrix the row and column values are identical i,e, the co-citation count of two authors, there is no clear choice for diagonal values. They suggest the number of times an author has been co-cited with himself excluding self citation rather than the common treatment as zeros or as missing values. When the matrix is converted to a similarity matrix the normal procedure is to create a matrix of Pearson's r coefficients between data vectors. Ranking by r and by co-citation frequency and by intuition can easily yield three different orders. It would seem necessary that the adding of zeros to the matrix will not affect the value or the relative order of similarity measures but it is shown that this is not the case with Pearson's r. Using 913 bibliographic descriptions form the Web of Science of articles form JASIS and Scientometrics, authors names were extracted, edited and 12 information retrieval authors and 12 bibliometric authors each from the top 100 most cited were selected. Co-citation and r value (diagonal elements treated as missing) matrices were constructed, and then reconstructed in expanded form. Adding zeros can both change the r value and the ordering of the authors based upon that value. A chi-squared distance measure would not violate these requirements, nor would the cosine coefficient. It is also argued that co-citation data is ordinal data since there is no assurance of an absolute zero number of co-citations, and thus Pearson is not appropriate. The number of ties in co-citation data make the use of the Spearman rank order coefficient problematic.
- Date
- 9. 7.2006 10:22:35
-
Vinkler, P.: ¬A quasi-quantitative citation model (1987)
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- Source
- Scientometrics. 12(1987) nos.1-2, S.47-72
-
Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009)
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- Date
- 22. 3.2009 19:22:35
-
Vinkler, P.: Relationships between the rate of scientific development and citations : the chance for citedness model (1996)
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- Date
- 10. 9.1996 12:59:31
-
Chan, H.C.; Kim, H.-W.; Tan, W.C.: Information systems citation patterns from International Conference on Information Systems articles (2006)
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- Date
- 3. 1.2007 17:22:03
-
H-Index auch im Web of Science (2008)
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- Date
- 6. 4.2008 19:04:22
-
Mingers, J.; Burrell, Q.L.: Modeling citation behavior in Management Science journals (2006)
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- Date
- 26.12.2007 19:22:05
-
Alvarez, P.; Pulgarin, A.: ¬The Rasch model : measuring the impact of scientific journals: analytical chemistry (1996)
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- Date
- 10. 9.1996 12:55:36
-
White, H.D.; McCain, K.W.: Visualizing a discipline : an author co-citation analysis of information science, 1972-1995 (1998)
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- Abstract
- Presents an extensive domain analysis of information science in terms of its authors. Names of those most frequently cited in 12 key journals from 1972 through 1995 were retrieved from Social SciSearch via Dialog. The top 120 were submitted to author co-citation analyzes, yielding automatic classifications relevant to histories of the field
-
Marx, W.: Wie mißt man Forschungsqualität? : der Science Citation Index - ein Maßstab für die Bewertung (1996)
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- Source
- Cogito. 12(1996) H.4, S.35-38
-
Moed, H.F.: Differences in the construction of SCI based bibliometric indicators among various producers : a first overview (1996)
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- Date
- 10. 9.1996 12:59:31
-
So, C.Y.K.: Citation ranking versus expert judgement in evaluating communication scholars : effects of research specialty size and individual prominence (1998)
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- Date
- 2. 3.1997 12:16:21
-
Kostoff, R.N.: Citation analysis cross field normalization : a new paradigm (1997)
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- Date
- 2. 3.1997 12:16:21
-
Wouters, P.: ¬The signs of science (1998)
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- Date
- 2. 3.1997 12:16:21
-
Fujigaki, Y.: ¬The citation system : citation networks as repeatedly focusing on difference, continuous re-evaluation, and as persistent knowledge accumulation (1998)
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- Date
- 6. 9.2000 19:48:12
-
MacRoberts, M.H.; MacRoberts, B.R.: Problems of citation analysis : a study of uncited and seldom-cited influences (2010)
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- Source
- Journal of the American Society for Information Science and Technology. 61(2010) no.1, S.1-12
-
Brown, C.: ¬The evolution of preprints in the scholarly communication of physicists and astronomers (2001)
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- Abstract
- In one of two bibliometric papers in this issue Brown looks at formal publication and citation of Eprints as shown by the policies and practices of 37 top tier physics journals, and by citation trends in ISI's SciSearch database and Journal Citation Reports. Citation analysis was carried out if Eprint cites were indicated by editor response, instruction to authors sections, reports in the literature, or actual examination of citation lists. Total contribution to 12 archives and their citation counts in the journals were compiled. Of the 13 editors surveyed that responded, 8 published papers that had appeared in the archive. Two of these required removal from the archive at publication; two of the 13 did not publish papers that have appeared as Eprints. A review journal that solicits its contributions allowed citation of Eprints. Seven allowed citations to Eprints, but were less than enthusiastic.Nearly 36,000 citations were made to the 12 archives. Citations to the 37 journals and their impact factors remain constant over the period of 1991 to 1998. Eprint citations appear to peak about 3 years after appearance as do citations to published papers. Contribution to the archives, and their use as measured by citation, is clearly growing. Citation form and publishing policy varies from journal to journal.
