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Journal Citation Reports on the Web. Copyright 2006 Thomson Corporation 2 Introduction JCR distills citation trend data for 7,600+ journals from more.

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Presentation on theme: "Journal Citation Reports on the Web. Copyright 2006 Thomson Corporation 2 Introduction JCR distills citation trend data for 7,600+ journals from more."— Presentation transcript:

1 Journal Citation Reports on the Web

2 Copyright 2006 Thomson Corporation 2 Introduction JCR distills citation trend data for 7,600+ journals from more than 25 million cited references indexed by ISI every year Science Edition and Social Science Edition released annually Science Edition covers 5,928 journals in 171 subjects Social Science Edition covers 1,716 journals in 55 subjects

3 Copyright 2006 Thomson Corporation 3 Uses of the JCR What do librarians, researchers, and Publishers do with the JCR? Discover highest-impact journals Develop and manage journal collections Compare a custom selection of journals Find related journals Identify review journals View citation information for subject categories

4 Copyright 2006 Thomson Corporation 4 “Using the JCR Wisely” Indicates factors that affect JCR data Elucidates conditions that may affect journals’ ranking and impact factor

5 Copyright 2006 Thomson Corporation 5 New features in v.4.0 Related journals –Find journals that are related to one another based on citation behavior –Find journals that are related to specific subject categories Subject category level data –Impact Factor, Immediacy Index, Half-Life data at the category level –Use this info to put the journal IF in context

6 Copyright 2006 Thomson Corporation 6 JCR Home Page Before starting, click on Information for New Users and read “Using the JCR Wisely.” Science and Social Science editions must be searched separately

7 Copyright 2006 Thomson Corporation 7 Journal Search Screen You can search by Full Journal Title, Journal Abbreviation, Title Word, or ISSN. Select Title Word from the menu.

8 Copyright 2006 Thomson Corporation 8 Journal Summary List Click on title link to display full record.

9 Copyright 2006 Thomson Corporation 9 Full Record Page Explanatory data is found below View category data here

10 Copyright 2006 Thomson Corporation 10 Impact Factor ISI calculates the impact factor by: dividing the number of citations made in 2004 to items published in the previous two years by the total number of articles & reviews published in the previous two years

11 Copyright 2006 Thomson Corporation 11 Immediacy Index Tells you how often articles published in a journal are cited during their year of publication This can be an indication of how “hot” a journal is Calculated by dividing the number of citations to articles published in a year (2004) by the total number of articles published in that year (2004).

12 Copyright 2006 Thomson Corporation 12 Cited Half Life Median age of the articles published in this journal that were cited in 2004 Half of the citations received in 2004 were to articles published in 1996/1997 or later

13 Copyright 2006 Thomson Corporation 13 Citing Half Life Median age of articles cited by the selected journal in its article references Indicates that over half of the articles cited by the selected journal were published between 1995 and 2005.

14 Copyright 2006 Thomson Corporation 14 Source Data Tallies the number of original research and review articles published in the current year (2005) Also tallies the number of references published by the selected journal in the current year Other Items = document types not included in the number of citable items published by this journal (e.g. letters, news items, editorials, etc.) Review articles are often more highly cited than original research articles: consider a journal’s source data by document type.

15 Copyright 2006 Thomson Corporation 15 More data from the Full Record

16 Copyright 2006 Thomson Corporation 16 Cited Journal List A list of journals which have cited Atmosphere- Ocean within 2004 Publication year of cited article. References to all older articles.

17 Copyright 2006 Thomson Corporation 17 Citing Journal List A list of journals that Atmosphere-Ocean has cited within 2004. The publication year of the articles being cited

18 Copyright 2006 Thomson Corporation 18 Related Journals These journals have a subject relationship to the journal Atmosphere-Ocean based on citations given or received.

19 Copyright 2006 Thomson Corporation 19 Relatedness: Journal level Considers bi-directional citation pairs Journal i cites Journal j AND Journal j cites Journal I The specific relatedness calculation we are using was developed by Garfield and Pudovkin (2002). “Algorithmic procedure for finding semantically related journals.” JASIST 53: 1113-1119.

20 Copyright 2006 Thomson Corporation 20 Related Journals The Relatedness between journals is characterized by two calculations R i>j = H i>j * 10 6 (Pap j * Ref i ) R j>i = H j>i * 10 6 (Pap i * Ref j )

21 Copyright 2006 Thomson Corporation 21 What does “relatedness” mean? The relatedness calculation is like a measure of the “citation density” between two journals. Hi>j The numerator considers the number of citations going from journal i to journal j The denominator includes two factors that normalize for the size of the journals: Papj : the number of papers in the cited journal Refi : the total number of references given by journal i to any journal

22 Copyright 2006 Thomson Corporation 22 Impact Factor Trend Graph Indicates Impact Factor over a period of five years Entry point into JCR from Web of Science

23 Copyright 2006 Thomson Corporation 23 Examine Subject Categories

24 Copyright 2006 Thomson Corporation 24 View Journal data View journal-level data for publications in this subject category

25 Copyright 2006 Thomson Corporation 25 Sort journals in the category Compare journals based on Impact Factor or other data elements You may check here for journal name changes occurring within the past two years. This may affect a journal’s Impact Factor.

26 Copyright 2006 Thomson Corporation 26 View Category Data for context Use Control-click to select multiple categories

27 Copyright 2006 Thomson Corporation 27 Aggregate data Calculations are similar to those for journals, but are created from an entire category’s citation data

28 Copyright 2006 Thomson Corporation 28 Category level data Median Impact Factor – the Impact Factor mid-point for journals in the category. 50% of journals rank above, 50% rank below. Aggregate Impact Factor –Citation rate of the “average” article in a subject category –Use as benchmarking tool to compare a journal to its overall subject category.

29 Copyright 2006 Thomson Corporation 29 Category Data Calculations for Aggregate data More category data

30 Copyright 2006 Thomson Corporation 30 Cited Category Table A list of journals which cited titles within the Health Policy and Services category

31 Copyright 2006 Thomson Corporation 31 Citing Category Table A list of titles that received citations from journals in this subject category

32 Copyright 2006 Thomson Corporation 32 Related journals – subject category These journals have a subject relationship to the Health Policy & Services subject category by citations either given or received

33 Copyright 2006 Thomson Corporation 33 Marking Journals Mark individual journals or all in the list for later output. Click the Marked List button to access output options.

34 Copyright 2006 Thomson Corporation 34 Output from Marked List Format the list for printing, or save the list as a text file.

35 Copyright 2006 Thomson Corporation 35 Output options Print your list (using your browser’s Print function) Or save as a text file which can be imported into a spreadsheet

36 Copyright 2006 Thomson Corporation 36 Contacting Thomson Scientific Contact the Technical Help Desk –email: ts.support.americas@thomson.com / ts.support.emea@thomson.comts.support.americas@thomson.comts.support.emea@thomson.com Visit us on the web at: http://scientific.thomson.com/supporthttp://scientific.thomson.com/support


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