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A modified method for calculating the Impact Factors of journals in ISI Journal Citation Reports: Polymer Science Category in 1997–2001

Author

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  • Narongrit Sombatsompop

    (Polymer Processing and Flow (P-PROF) Group, School of Energy & Materials, King Mongkut's University of Technology Thonburi (KMUTT))

  • T. Markpin

    (Polymer Processing and Flow (P-PROF) Group, School of Energy & Materials, King Mongkut's University of Technology Thonburi (KMUTT))

  • N. Premkamolnetr

    (King Mongkut's University of Technology Thonburi (KMUTT))

Abstract

This article introduces a new modified method for calculating the impact factor of journals based on the current ISI practice in generating journal impact factor values. The impact factor value for a journal calculated by the proposed method, the so-called Cited Half-Life Impact Factor (CHAL) method, which is based on the ratio of the number of current year citations of articles from the previous X years to that of articles published in the previous X years, the X value being equal to the value of the cited half-life of the journal in the current year. Thirty-four journals in the Polymer Science Category from the ISI Subject Heading Categories were selected and examined. Total citations, impact factors and cited half-life of the 34 journals during the last five years (1997-2001) were retrieved from the ISI Journal Citation Reports and were used as the data source for the calculations in this work, the impact factor values from ISI and CHAL methods then being compared. The positions of the journals ranked by impact factors obtained from the ISI method were different from those from the CHAL method. It was concluded that the CHAL method was more suitable for calculating the impact factor of the journals than the existing ISI method.

Suggested Citation

  • Narongrit Sombatsompop & T. Markpin & N. Premkamolnetr, 2004. "A modified method for calculating the Impact Factors of journals in ISI Journal Citation Reports: Polymer Science Category in 1997–2001," Scientometrics, Springer;Akadémiai Kiadó, vol. 60(2), pages 217-235, June.
    • Handle: RePEc:spr:scient:v:60:y:2004:i:2:d:10.1023_b:scie.0000027794.98854.f6
    DOI: 10.1023/B:SCIE.0000027794.98854.f6
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    References listed on IDEAS

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    Cited by:

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    3. Tahamtan, Iman & Bornmann, Lutz, 2018. "Creativity in science and the link to cited references: Is the creative potential of papers reflected in their cited references?," Journal of Informetrics, Elsevier, vol. 12(3), pages 906-930.
    4. Katja Rost & Bruno S. Frey, 2011. "Quantitative and Qualitative Rankings of Scholars," Schmalenbach Business Review (sbr), LMU Munich School of Management, vol. 63(1), pages 63-91, January.
    5. Dar-Zen Chen & Chang-Pin Lin & Mu-Hsuan Huang & Chen-Yu Huang, 2010. "Constructing a new patent bibliometric performance measure by using modified citation rate analyses with dynamic backward citation windows," Scientometrics, Springer;Akadémiai Kiadó, vol. 82(1), pages 149-163, January.
    6. Peter Jacso, 2012. "Grim tales about the impact factor and the h-index in the Web of Science and the Journal Citation Reports databases: reflections on Vanclay’s criticism," Scientometrics, Springer;Akadémiai Kiadó, vol. 92(2), pages 325-354, August.
    7. Young Man Ko & Soo-Ryun Cho & Yong Seok Park, 2011. "A study on the optimization of KCI-based index (Kor-Factor) in evaluating Korean journals," Scientometrics, Springer;Akadémiai Kiadó, vol. 88(1), pages 61-71, July.
    8. Liu, Xuan Zhen & Fang, Hui, 2020. "A comparison among citation-based journal indicators and their relative changes with time," Journal of Informetrics, Elsevier, vol. 14(1).
    9. Juan Miguel Campanario, 2011. "Empirical study of journal impact factors obtained using the classical two-year citation window versus a five-year citation window," Scientometrics, Springer;Akadémiai Kiadó, vol. 87(1), pages 189-204, April.

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