Yue WP, Wilson CS, Rousseau R "The immediacy index and the journal impact factor: Two highly correlated derived measures" CANADIAN JOURNAL OF INFORMATION AND LIBRARY SCIENCE-REVUE " 28 (1): 33-48 MAR 2004

[Eugene Garfield]

Ronald Rousseau : ronald.rousseau at khbo.be

TITLE    The immediacy index and the journal impact factor: Two highly
         correlated derived measures
AUTHOR   Yue WP, Wilson CS, Rousseau R
JOURNAL  CANADIAN JOURNAL OF INFORMATION AND LIBRARY SCIENCE-REVUE
         CANADIENNE DES SCIENCES DE L INFORMATION ET DE BIBLIOTHECONOMIE
         28 (1): 33-48 MAR 2004


Document type: Article     Language: English     Cited References: 26
Times Cited: 0

Abstract:
This article investigates the relationship between the Journal "impact
factor" (IF) and the "immediacy index" (II) in the sciences, as well as the
social sciences. It is found that there are highly positive correlations
between the IF and the II in most sciences and social sciences disciplines
although the correlation strengths vary across disciplines. Moreover, it is
found that the II of year Y is also a good predictor for the IF of year Y +
1. These results are strongest for rapidly developing fields, such as
biomedicine. Based on the assumption that the citation-age distribution has
a Poisson distribution, our empirical data are clarified by a simulation.

Addresses:
Yue WP, Univ New S Wales, Sch Informat Syst Technol & Management, Sydney,
NSW 2052, Australia
Univ New S Wales, Sch Informat Syst Technol & Management, Sydney, NSW 2052,
Australia
KHBO, Dept Ind Sci & Technol, B-8400 Oostende, Belgium
UA, IBW, B-2610 Wilrijk, Belgium

Publisher: CANADIAN ASSOC INFORMATION SCIENCE, PO BOX 6174, STATION J,
OTTAWA, ONTARIO K2A 1T2, CANADA

IDS Number: 808RE

ISSN: 1195-096X

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