metrics papers from the July issue of JASIST
Eugene Garfield
eugene.garfield at THOMSONREUTERS.COM
Tue Jul 20 16:48:44 EDT 2010
TITLE: Statistical Validation of a Global Model for the
Distribution of the Ultimate Number of Citations Accrued
by Papers
Published in a Scientific Journal (Article, English)
AUTHOR: Stringer, MJ; Sales-Pardo, M; Amaral, LAN
SOURCE: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE
AND TECHNOLOGY 61 (7). JUL 2010. p.1377-1385 JOHN WILEY
& SONS INC, HOBOKEN
SEARCH TERM(S): PRICE DJD rauth; CITATION* item_title;
JOURNAL item_title;
GLANZEL W SCIENTIST 18:8 2004
KEYWORDS+: IMPACT; BEHAVIOR; SCIENCE; POWER
ABSTRACT: A central issue in evaluative bibliometrics is the
characterization of the citation distribution of papers in the
scientific
literature. Here, we perform a large-scale empirical analysis of
journals
from every field in Thomson Reuters' Web of Science database. We find
that only 30 of the 2,184 journals have citation distributions that are
inconsistent with a discrete lognormal distribution at the rejection
threshold that controls the false discovery rate at 0.05. We find that
large, multidisciplinary journals are over-represented in this set of 30
journals, leading us to conclude that, within a discipline, citation
distributions are lognormal. Our results strongly suggest that the
discrete lognormal distribution is a globally accurate model for the
distribution of "eventual impact" of scientific papers published in
single-discipline journal in a single year that is removed sufficiently
from the present date.
AUTHOR ADDRESS: MJ Stringer, Northwestern Univ, Dept Phys & Astron,
Evanston, IL 60208 USA
[ ]<-- Enter an X to order article (IDS: 615QV 00006) ISSN: 1532-2882
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TITLE: The Structure and Dynamics of Cocitation Clusters: A
Multiple-Perspective Cocitation Analysis (Article,
English)
AUTHOR: Chen, CM; Ibekwe-SanJuan, F; Hou, JH
SOURCE: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE
AND TECHNOLOGY 61 (7). JUL 2010. p.1386-1409 JOHN WILEY
& SONS INC, HOBOKEN
SEARCH TERM(S): CRONIN B rauth; GARFIELD E rauth;
SMALL H J DOC 36:183
1980;
SMALL H J AM SOC INFORM SCI 24:265
1973;
SMALL H SCIENTOMETRICS 8:321
1985;
SMALL HG SOC STUD SCI 8:327
1978;
SMALL H SCIENTOMETRICS 7:391
1985;
COCITATION* item_title;
GARFIELD E J INFORM SCI 30:119 2004
KEYWORDS+: INFORMATION-SCIENCE; RESEARCH FRONTS; COMBINING
BIBLIOMETRICS; SCIENTIFIC LITERATURE; RELEVANCE THEORY;
CONCEPT SYMBOLS; GOOGLE SCHOLAR; KNOWLEDGE; NETWORKS;
WEB
ABSTRACT: A multiple-perspective cocitation analysis method is
introduced for characterizing and interpreting the structure and
dynamics
of cocitation clusters. The method facilitates analytic and sense making
tasks by integrating network visualization, spectral clustering,
automatic cluster labeling, and text summarization. Cocitation networks
are decomposed into cocitation clusters. The interpretation of these
clusters is augmented by automatic cluster labeling and summarization.
The method focuses on the interrelations between a cocitation cluster's
members and their citers. The generic method is applied to a three-part
analysis of the field of information science as defined by 12 journals
published between 1996 and 2008: (a) a comparative author cocitation
analysis (ACA), (b) a progressive ACA of a time series of cocitation
networks, and (c) a progressive document cocitation analysis (DCA).
Results show that the multiple-perspective method increases the
interpretability and accountability of both ACA and DCA networks.
AUTHOR ADDRESS: CM Chen, Drexel Univ, Coll Informat Sci & Technol, 3141
Chestnut St, Philadelphia, PA 19104 USA
[ ]<-- Enter an X to order article (IDS: 615QV 00007) ISSN: 1532-2882
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TITLE: Modes of Collaboration in Modern Science: Beyond Power
Laws and Preferential Attachment (Article, English)
AUTHOR: Milojevic, S
SOURCE: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE
AND TECHNOLOGY 61 (7). JUL 2010. p.1410-1423 JOHN WILEY
& SONS INC, HOBOKEN
SEARCH TERM(S): CRONIN B rauth; PRICE DJD rauth; ZUCKERMAN H rauth;
MERTON RK SCIENCE 159:56 1968
KEYWORDS+: SCIENTIFIC CO-AUTHORSHIP; CUMULATIVE ADVANTAGE;
NETWORKS;
PATTERNS; PRODUCTIVITY; EVOLUTION; BEHAVIOR; IMPACT
ABSTRACT: The goal of the study was to determine the underlying
processes leading to the observed collaborator distribution in modern
scientific fields, with special attention to nonpower-law behavior.
Nanoscience is used as a case study of a modern interdisciplinary field
and its coauthorship network for 2000-2004 period is constructed from
the
Nano Bank database. We find three collaboration modes that correspond to
three distinct ranges in the distribution of collaborators: (1) for
authors with fewer than 20 collaborators (the majority) preferential
attachment does not hold and they form a log-normal "hook" instead of a
power law; (2) authors with more than 20 collaborators benefit from
preferential attachment and form a power law tail; and (3) authors with
between 250 and 800 collaborators are more frequent than expected
because
of the hyperauthorship practices in certain subfields.
AUTHOR ADDRESS: S Milojevic, Indiana Univ, Sch Lib & Informat Sci,
Bloomington, IN 47405 USA
[ ]<-- Enter an X to order article (IDS: 615QV 00008) ISSN: 1532-2882
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TITLE: Measuring Impact of Twelve Information Scientists Using
the DCI Index (Article, English)
AUTHOR: Ahlgren, P; Jarvelin, K
SOURCE: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE
AND TECHNOLOGY 61 (7). JUL 2010. p.1424-1439 JOHN WILEY
& SONS INC, HOBOKEN
SEARCH TERM(S): CRONIN B rauth; SWANSON DR rauth;
HIRSCH JE P NATL ACAD SCI USA 102:16569
2005;
WENNERAS C NATURE 387:341 1997
KEYWORDS+: H-INDEX; HIRSCH-INDEX; SCIENCE; RESEARCHERS; RETRIEVAL;
THOUGHTS; NEPOTISM; SEEKING
ABSTRACT: The Discounted Cumulated Impact (DCI) index has recently
been proposed for research evaluation. In the present work an earlier
dataset by Cronin and Meho (2007) is reanalyzed, with the aim of
exemplifying the salient features of the DCI index. We apply the index
on, and compare our results to, the outcomes of the Cronin-Meho (2007)
study. Both authors and their top publications are used as units of
analysis, which suggests that, by adjusting the parameters of evaluation
according to the needs of research evaluation, the DCI index delivers
data on an author's (or publication's) "lifetime" impact or current
impact at the time of evaluation on an author's (or publication's)
capability of inviting citations from highly cited later publications as
an indication of impact, and on the relative impact across a set of
authors (or publications) over their "lifetime" or currently.
AUTHOR ADDRESS: P Ahlgren, Stockholm Univ, Univ Lib, Dept E Resources,
S-10691 Stockholm, Sweden
[ ]<-- Enter an X to order article (IDS: 615QV 00009) ISSN: 1532-2882
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TITLE: Policy-Relevant Webometrics for Individual Scientific
Fields (Article, English)
AUTHOR: Thelwall, M; Klitkou, A; Verbeek, A; Stuart, D; Vincent,
C
SOURCE: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE
AND TECHNOLOGY 61 (7). JUL 2010. p.1464-1475 JOHN WILEY
& SONS INC, HOBOKEN
SEARCH TERM(S): GARFIELD E rauth;
SMALL H J AM SOC INFORM SCI 50:799
1999;
WHITE HD J AM SOC INFORM SCI 32:163
1981;
GARFIELD E CAN MED ASSOC J 161:979 1999
KEYWORDS+: WEB-SITE INTERLINKING; INFORMATION-SCIENCE; IMPACT
FACTORS; ACADEMIC WEB; AUTHOR COCITATION; SEARCH
ENGINES;
COMMUNICATION; CITATIONS; LINKS; COLLABORATION
ABSTRACT: Despite over 10 years of research there is no agreement
on the most suitable roles for Webometric indicators in support of
research policy and almost no field-based Webometrics. This article
partly fills these gaps by analyzing the potential of policy-relevant
Webometrics for individual scientific fields with the help of 4 case
studies. Although Webometrics cannot provide robust indicators of
knowledge flows or research impact, it can provide some evidence of
networking and mutual awareness. The scope of Webometrics is also
relatively wide, including not only research organizations and firms but
also intermediary groups like professional associations, Web portals,
and
government agencies. Webometrics can, therefore, provide evidence about
the research process to compliment peer review, bibliometric, and patent
indicators: tracking the early, mainly prepublication development of new
fields and research funding initiatives, assessing the role and impact
of
intermediary organizations and the need for new ones, and monitoring the
extent of mutual awareness in particular research areas.
AUTHOR ADDRESS: M Thelwall, Wolverhampton Univ, Stat Cybermetr Res Grp,
Sch
Comp & Informat Technol, Wulfruna St, Wolverhampton WV1
1SB, England
[ ]<-- Enter an X to order article (IDS: 615QV 00011) ISSN: 1532-2882
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TITLE: The Relation Between Eigenfactor, Audience Factor, and
Influence Weight (Article, English)
AUTHOR: Waltman, L; van Eck, NJ
SOURCE: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE
AND TECHNOLOGY 61 (7). JUL 2010. p.1476-1486 JOHN WILEY
& SONS INC, HOBOKEN
SEARCH TERM(S): GARFIELD E rauth;
GARFIELD E JAMA-J AM MED ASSOC 295:90
2006;
GARFIELD E SCIENCE 178:471 1972
KEYWORDS+: JOURNAL IMPACT FACTOR; ECONOMICS JOURNALS; CITATION
INFLUENCE; SCIENCE; PAGERANK
ABSTRACT: We present a theoretical and empirical analysis of a
number of bibliometric indicators of journal performance. We focus on
three indicators in particular: the Eigenfactor indicator, the audience
factor, and the influence weight indicator. Our main finding is that the
last two indicators can be regarded as a kind of special case of the
first indicator. We also find that the three indicators can be nicely
characterized in terms of two properties. We refer to these properties
as
the property of insensitivity to field differences and the property of
insensitivity to insignificant journals. The empirical results that we
present illustrate our theoretical findings. We also show empirically
that the differences between various indicators of journal performance
are quite substantial.
AUTHOR ADDRESS: L Waltman, Leiden Univ, Ctr Sci & Technol Studies,
NL-2300
RA Leiden, Netherlands
[ ]<-- Enter an X to order article (IDS: 615QV 00012) ISSN: 1532-2882
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TITLE: New Insights Into the Relationship Between the h-Index
and Self-Citations? (Letter, English)
AUTHOR: Engqvist, L; Frommen, JG
SOURCE: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE
AND TECHNOLOGY 61 (7). JUL 2010. p.1514-1515 JOHN WILEY
& SONS INC, HOBOKEN
SEARCH TERM(S): CITATION* item_title;
HIRSCH JE P NATL ACAD SCI USA 102:16569
2005;
LETTER* doctype
AUTHOR ADDRESS: L Engqvist, Univ Groningen, Theoret Biol Grp, Ctr Ecol &
Evolutionary Studies, Groningen, Netherlands
[ ]<-- Enter an X to order article (IDS: 615QV 00021) ISSN: 1532-2882
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Eugene Garfield, PhD. email: garfield at codex.cis.upenn.edu
<mailto:garfield at codex.cis.upenn.edu>
home page: www.eugenegarfield.org <http://www.eugenegarfield.org/>
Tel: 610-525-8729 Fax: 610-560-4749
Chairman Emeritus, ThomsonReuters Scientific (formerly ISI)
1500 Spring Garden Street, Philadelphia, PA 19130-4067
Editor Emeritus, The Scientist LLC. www.the-scientist.com
<http://www.the-scientist.com/>
400 Market St. Suite 330 Philadelphia, PA 19106-2535
Past President, American Society for Information Science and Technology
(ASIS&T) www.asist.org <http://www.asist.org/>
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