The Citation Impact Center

Understanding the Journal Impact Factor

As part of an ongoing effort for greater clarity and transparency regarding the Journal Impact Factor, members of Thomson Reuters Journal Citation Reports team have prepared a Case Study in the April 2011 issue of Learned Publishing discussing the Journal Impact Factor numerator.

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US No Longer Colossus of Science

New Report details how US dominance in scientific research is struggling significantly to keep pace with increased output from Europe and Asia. Yet research impact and institutional reputation remains strong.

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Nobel Laureate Predictions

Each year, Thomson Reuters uses data from its research solution, Web of KnowledgeSM, to release its picks for the Thomson Reuters Citation Laureates — researchers likely to be in contention for Nobel honors. With just two weeks left before the recipients of the Nobel Prize are announced, see who Thomson Reuters thinks the winners could be!

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New Report Details State of Scientific Research in Japan

For years Japan has been known for its world-class universities, established government laboratories and several Nobel Prizes. Yet a new report shows Japan's relative impact in scientific research remains below the world average.

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What does it mean to be #2 in Impact?

Avid users of the Journal Citation Reports® (JCR) might notice something surprising in the 2009 data. Does this indicate a stunning achievement or flawed metric?

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Web of Science Coverage Expansion

In recent years we have witnessed an explosion in the production and availability of scholarly research results. This growth is reflected in the gradual expansion of journal coverage in the Web of Science.

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Understanding the Journal Impact Factor

Over the years, Thomson Reuters employees have answered thousands of questions about the Journal Impact Factor, how it is calculated, what does it mean, how are the data prepared. We are continuing to broaden our efforts to maintain open and cooperative communication with scholars, publishers and librarians to support the proper use of the Journal Impact Factor. The September 9, 2009 issue of JAMA-Journal of the American Medical Association contains a Commentary prepared by members of Thomson Reuters Journal Citation Reports team. This writing describes in detail the determination of citable items (the denominator of the Journal Impact Factor calculation), and how the distinction between citable and non-citable items affects the Journal Impact Factor.

The first 150 words of the article can be viewed at the following link. Access to the full text is available to JAMA subscribers.

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Choosing Thomson Reuters Citation Laureates:
The Process and the Results

In anticipation of the Nobel Prize announcements for 2008, which will begin on October 6, Thomson Reuters (NYSE: TRI) is once again revealing its own list of Laureates — in this case, Thomson Reuters Citation Laureates.

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Preserving the Integrity of The Journal Impact Factor Guidelines from the Scientific business of Thomson Reuters

The Journal Impact Factor is a proprietary metric, published annually by the Scientific business of Thomson Reuters via Journal Citation Reports (JCR). JCR provides a number of metrics and quantitative tools for ranking, evaluating, and categorizing and comparing journals.

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H-index: The hottest topic in information science today

In late 2005, Jorge E. Hirsch, Professor of Physics at the University of California, San Diego, published an article describing the h-index, which, he called "a useful index to characterize the scientific output of a researcher." (See J.E. Hirsch, "An index to quantify an individual's scientific research output," PNAS, 102(46): 16569-72, 15 November 2005.

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Thomson Reuters Speaks with David Tempest, Elsevier

As Associate Director of Research and Academic Relations for Elsevier, one of the world's foremost scholarly publishers, bibliometrician David Tempest and his team provide the analysis to advise Elsevier's 2,000 journals on maximizing their quality. He is a frequent lecturer on the uses (and misuses) of Impact Factor. Today, David talks with Thomson Reuters about the relationship between Impact Factor and journal quality, and Elsevier's commitment to best practice with the use of bibliometrics.

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Thomson Reuters speaks with Jim Testa, Thomson Reuters, Director of Editorial Development, about Impact Factor

As Thomson ReutersThomson Reuters Director of Editorial Development, Jim Testa travels the globe working with researchers, institutions and scholarly journals to understand their research needs in the areas of both content and evaluation. Here, we talk with Jim about the controversial, yet ever present Impact Factor, a proprietary measure of journal influence created in the 1950s by Thomson Reuters Chairman Emeritus, (ISI Founder) Dr. Eugene Garfield.

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Thomson Reuters speaks with Jim Pringle, Thomson ReutersThomson Reuters Vice President of Product Development, about Impact Factor

Today, Jim Pringle, Thomson Reuters Vice President of Product Development, shares with us his insights into research performance metrics, including his unique perspective of the much-talked-about Journal Impact Factor.

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Journal Citation Reports New Release


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