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JCR Web: The Impact on Your Collection…

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For decades, the Journal Citation Reports (JCR) has served as a critical piece of journals collection development, characterization, and evaluation within academic and government libraries worldwide. ...

For decades, the Journal Citation Reports (JCR) has served as a critical piece of journals collection development, characterization, and evaluation within academic and government libraries worldwide. Though certainly its most high profile metric, JCR is not just the Impact Factor.

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  • Note that in this display of top Immunology journals the 5-Year Impact Factor is, with the exception of one journal, lower than the traditional 2-Year Impact factor. Immunology is a life science discipline that is typically “fast moving” and therefore this makes perfect sense that articles are cited more quickly, and may lose some citation impact after the first few years.
  • Within this display of Geology journals however, the 5-Year Impact Factor is in every case higher than the traditional 2-Year Impact Factor. In contrast to Immunology for example, published research with Geology typically takes more time to fully realize its impact.
  • Eigenfactor accounts for the fact that a single citation from a high-quality journal may be more valuable than multiple citations from peripheral publications. In order to make these calculations, computing an Eigenfactor score in understandably more complex and therefore less transparent than Impact Factor calculations. Most importantly, Eigenfactor is concerned with measuring the total contribution/value of a journal to the scientific community while Impact Factor measures the average impact of an article published in a given journal. Impact Factor includes a much greater element of “timeliness”, given its 2-yr window of cited works – and focuses on one-to-one citation relationships among journals. Simple and direct, easy to understand, these are strengths of the Impact Factor as well as the 5-year Impact Factor which simply takes into consideration a greater window (5 years) of cited works than the traditional Impact factor. However, describe Eigenfactor this way -- Eigenfactor measures the total influence of a journal on the scholarly literature or, comparably, the total value provided by all of the articles published in that journal in a year. To help clarify, contrast with Impact Factor -- The Eigenfactor Score provides a measure of the total influence that a journal provides, rather than a measure of influence per article. Impact Factor, by contrast, presents an average per-article influence of a given journal. An alternate description – Eigenfactor score accounts for not just the raw citations to Journal X (such as Impact Factor), but the importance of the journals citing the journals that account for the raw citations to Journal X.  OR – The Eigenfactor Score of Journal X is defined as the percentage of the total weighted citations that Journal X receives from all source journals within the JCR.

JCR Web: The Impact on Your Collection… JCR Web: The Impact on Your Collection… Presentation Transcript

  • JCR Web: The Impact on Your Collection… ALA Annual Meeting Washington D.C. June 2010
    • From the perspective of the librarian, what makes a “good” journal or journal collection…
    Journal Citation Reports Journals Collection Development Document Delivery Requests Editorial Quality Faculty Recommendations Indexing Sources Usage Cost Local Influence Citation Impact
    • From the perspective of the journal reader or “user” , what makes a “good” journal is debatable.
    • Some Commonly Noted Criteria**:
    Strong Reviewers and Peer-Review Process Manuscript Rejection Rates Highly Respected Editor & Editorial Board Clear, Compelling Editorial Policies Authors Prestige, Notoriety Inclusion of High Quality Research Publisher/Society Affiliation Readership – Size, Diversity Citation Impact **Wellington, Jerry; Torgerson, Carole J. Writing for Publication: What Counts as a "High Status, Eminent Academic Journal“? Journal of Further and Higher Education, v29 n1 p35-48 Feb 2005 Journal Citation Reports
    • For decades, the Journal Citation Reports (JCR) has served as a critical piece of journals collection development, characterization, and evaluation within academic and government libraries worldwide.
    Journal Citation Reports Though certainly its most high profile metric, the JCR is not just the Impact Factor .
  • JCR – Journal Citation Reports A host of journal information and metrics to assist in collection development, editorial decision-making, manuscript submission, etc… Where collection development is concerned – this information is to compliment other factors taken into consideration in determining overall journal influence and impact. Impact Factor 5-Year Impact Factor Immediacy Index Cited Half-Life Self-Citation Rates Rank-in-CategoryTables Article Influence Score TM Eigenfactor Score TM
    • Impact Factor is –
    • Transparent, very easy to understand
    • A known, accepted standard. For decades IF has been accepted by both the publishing and library communities.
    • There is always the opportunity for open dialog with Thomson Reuters regarding the calculation of IF for a particular journal.
    JCR – Journal Citation Reports – Impact Factor
    • Impact Factor Origin – created in the early 1960’s by Dr. Eugene Garfield and Dr. Irv Sher in order to assist with selection of journals for the Science Citation Index (SCI).
    • Impact Factor is Transparent, very Easy to Understand
    Citations captured from Web of Science journals during the IF publication year to all items published within a journal in the prior two years. ____________________divided by___________________ The number of Articles and Reviews (citable items) published in a journal in the prior two years. JCR – Journal Citation Reports – Impact Factor
  • 2009 “Impact Factor Years” Citations captured from Web of Science journals during the IF publication year to all items published within a journal in the prior two years. ____________________divided by___________________ The number of Articles and Reviews (citable items) published in a journal in the prior two years. Impact Factor is Transparent, very Easy to Understand JCR – Journal Citation Reports – Impact Factor Great Strength in its Simplicity 2009 2008 2007 2006 2010
  • 5-Year Impact Factor, introduced Feb 2009 : To better gauge the impact of journals within fields where influence of published research evolves over a longer period of time than others well-represented by the traditional 2-Year Impact Factor. Immunology JCR – Journal Citation Reports – Impact Factor
  • 5-Year Impact Factor, introduced Feb 2009 : To better gauge the impact of journals within fields where influence of published research evolves over a longer period of time than others well-represented by the traditional 2-Year Impact Factor. JCR – Journal Citation Reports – Impact Factor Geology Geology
  • Eigenfactor Metrics TM : Eigenfactor TM and Article Influence TM : To compliment Impact Factor and other JCR metrics by providing a broader perspective on Journal Influence through specific measures now widely accepted by the scholarly community. These metrics are developed through The Eigenfactor Project™ -- a non-commercial academic research project sponsored by the Bergstrom lab in the Department of Biology at the University of Washington – www.eigenfactor.org JCR – Journal Citation Reports – Eigenfactor Metrics
  • Eigenfactor TM Score:
    • Scholarly references join journals together in a vast network of citations. The Eigenfactor Score algorithm uses the structure of the entire network to evaluate the importance of each journal, cutting across all disciplines. Self-citations are excluded.
    • This corresponds to a simple model of research in which readers follow chains of citations as they move from journal to journal.
    • Eigenfactor calculations take into consideration a 5-year span of citation activity utilizing data from the Journal Citation Reports.
    • Journals are considered to be influential if they are cited often by other influential journals .
    JCR – Journal Citation Reports – Eigenfactor Metrics
  • JCR – Journal Citation Reports
  • JCR – Journal Citation Reports A host of journal information and metrics to assist in collection development, editorial decision-making, manuscript submission, etc… Where collection development is concerned – this information is to compliment other factors taken into consideration in determining overall journal influence and impact. Impact Factor 5-Year Impact Factor Immediacy Index Cited Half-Life Self-Citation Rates Rank-in-CategoryTables Article Influence Score TM Eigenfactor Score TM
  • JCR Web: The Impact on Your Collection… ALA Annual Meeting Washington D.C. June 2010