Subject: Impact of Leading Journals From: Subbiah Arunachalam, MSSRF, Madras To: Members of LIS-FORUM, NCSI, IISc, Bangalore Here is a table giving impact of leading LIS journals in three different periods. These data were provided by the Research Group of ISI. For more information, please visit the ISI website [www.isinet.com]. Arun Journals Ranked by Impact: Information & Library Science Rank 1997 Impact Impact 1994-98 Impact 1981-98 Factor 1 J. Am. Med. Info. Assn. J. Chem. Info. Comput. ACM Tr. Office Sys. (2.16) (4.20) (16.45) 2 MIS Quarterly MIS Quarterly MIS Quarterly (1.62) (3.96) (14.35) 3 J. Am. Soc. Info. Sci. Knowledge Acquisition IEEE Tr. Info. Theory (1.26) (3.42) (9.13) 4 Int. J. Geogr. Inf. Sys. Ann. Rev. Info. Sci. Info. Tech. R&D Appl. (1.09) (3.00) (8.37) 5 Ann. Rev. Info. Sci. IEEE Tr. Info. Theory Ann. Rev. Info. Sci. (1.00) (2.77) (7.50) 6 Information Management Int. J. Geogr. Inf. Sys. J. Chem. Info. Comput. (0.70) (2.62) (7.28) 7 Scientometrics J. Documentation ACM Tr. Info. Systems (0.69) (2.47) (7.20) 8 Telecommun. Policy J. Am. Med. Info. Assn. J. Documentation (0.59) (2.45) (6.91) 9 Info. Process. Manage. J. Am. Soc. Info. Sci. J. Am. Soc. Info. Sci. (0.58) (2.41) (6.79) 10 J. Inform. Technol. Info. Systems Research Knowledge Acquisition (0.54) (2.30) (6.03) The above table compares the citation impact of journals in a given field as measured over three different time spans. The left-hand column ranks journals based on their 1997 "impact factor," as enumerated in the current edition of the ISI Journal Citation Reports. The 1997 impact factor is calculated by taking the number of all current citations to source items published in a journal over the previous two years and dividing by the number of articles published in the journal during the same period--in other words, a ratio between citations and recent citable items published. The rankings in the next two columns show impact over longer time spans, based on figures from the ISI Journal Performance Indicators on Diskette. In these columns, total citations to a journal's published papers are divided by the total number of papers that the journ! al published, producing a citations-per-paper impact score over a five-year period (middle column) and an 18-year period (right-hand column). SOURCE: Journal Citation Reports and Journal Performance Indicators on Diskette