Vermessene Wissenschaft. Etablierte und alternative Ansätze der Bibliometrie

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1 Vermessene Wissenschaft Etablierte und alternative Ansätze der Bibliometrie

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6 Agenda Zitationsbeziehungskonflikte Welche Datenbasis? Eine Zahl macht Karriere(n) Das Feld der etablierten Metriken Open Science und Bibliometrie Das Feld der alternativen Metriken LunchLesson zur Bibliometrie S. 6

7 Zitationsbeziehungskonflikte Welche Datenbasis? LunchLesson zur Bibliometrie S. 7

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15 Eine Zahl macht Karriere(n) Das Feld der etablierten Metriken LunchLesson zur Bibliometrie S. 15

16 Journal Impact Factor (JIF) LunchLesson zur Bibliometrie S. 16

17 Eigenfactor Score A journal's Eigenfactor score is our measure of the journal's total importance to the scientific community. With all else equal, a journal's Eigenfactor score doubles when it doubles in size. Eigenfactor scores are scaled so that the sum of the Eigenfactor scores of all journals listed in Thomson's Journal Citation Reports (JCR) is 100. Journal s Article Influence Score A journal's Article Influence score is a measure of the average influence of each of its articles over the first five years after publication. Article Influence score measures the average influence, per article, of the papers in a journal. As such, it is comparable to Thomson Scientific's widely-used Impact Factor. Article Influence scores are normalized so that the mean article in the entire Thomson Journal Citation Reports (JCR) database has an article influence of LunchLesson zur Bibliometrie S. 17

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19 SCImago Journal Rank (SJR) A new size-independent indicator of scientific journal prestige, the SJR2 indicator, is proposed. This indicator takes into account not only the prestige of the citing scientific journal but also its closeness to the cited journal using the cosine of the angle between the vectors of the two journals cocitation profiles. Vicente P. Guerrero-Botea/Félix Moya-Anegón: A further step forward in measuring journals scientific prestige: The SJR2 indicator, in: Journal of Informetrics 6 (2012) LunchLesson zur Bibliometrie S. 19

20 Source Normalized Impact per Paper (SNIP) SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field. The impact of a single citation is given higher value in subject areas where citations are less likely, and vice versa. SNIP is defined as the ratio of a journal's raw impact per publication and the citation potential in its subject field. This allows for evaluation of a journal compared to its competition and provides more contextual information, giving a better picture of the impact depending on the citation behavior in the field. LunchLesson zur Bibliometrie S. 20

21 h-index By Roland1952 (original file), modification by Coranton (svg version by Polarlys) (Own work). CC BY-SA 3.0 LunchLesson zur Bibliometrie S. 21

22 g-index Gindex1 by Ael 2 - Own work. CC BY-SA LunchLesson zur Bibliometrie S. 22

23 Open Science und Bibliometrie Das Feld der alternativen Metriken LunchLesson zur Bibliometrie S. 23

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36 Literaturhinweise Rafael Ball: Bibliometrie: einfach verständlich nachvollziehbar, Berlin u.a Stefanie Haustein: Multidimensional journal evaluation: analyzing scientific periodicals beyond the impact factor, Berlin u.a Ulrich Herb: Offenheit und wissenschaftliche Werke: Open Access, Open Review, Open Metrics, Open Science & Open Knowledge, in: Ders. (Hg.): Open Initiatives: Offenheit in der digitalen Welt und Wissenschaft, Saarbrücken 2012, S Online: LunchLesson zur Bibliometrie S. 36

37 Besten Dank für Ihr Interesse und guten Appetit! Für Fragen stehe ich Ihnen jederzeit sehr gerne zur Verfügung Dr. Christian Mathieu Staatsbibliothek zu Berlin Preußischer Kulturbesitz Wissenschaftliche Dienste Potsdamer Straße 33 D Berlin Tel.: +49 (0)30 / Fax +49 (0)30 / christian.mathieu@sbb.spk-berlin.de LunchLesson zur Bibliometrie S. 37