Beel, J; Gipp, B. 2009. Google Scholar's Ranking Algorithm: The Impact of Citation Counts (An Empirical Study). RCIS 2009
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Beel, J; Gipp, B. 2009. Google Scholar's Ranking Algorithm: The Impact of
Citation Counts (An Empirical Study). RCIS 2009: PROCEEDINGS OF THE IEEE
INTERNATIONAL CONFERENCE ON RESEARCH CHALLENGES IN INFORMATION
SCIENCE: 439-445. edited by Flory, A; Collard, M.presented at 3rd International
Conference on Research Challenges in Information Science (RCIS 2009) in Fez,
MOROCCO, APR 22-24, 2009.
Author Full Name(s): Beel, Joeran; Gipp, Bela
Document Type: Proceedings Paper
Abstract: Google Scholar is one of the major academic search engines but its
ranking algorithm for academic articles is unknown. In a recent study we partly
reverse-engineered the algorithm. This paper presents the results of our
second study. While the previous study provided a broad overview, the current
study focused on analyzing the correlation of an article's citation count and its
ranking in Google Scholar. For this study, citation counts and rankings of
1,364,757 articles were analyzed. Some results of our first study were
confirmed: Citation counts is the highest weighed factor in Google Scholar's
ranking algorithm. Highly cited articles are found significantly more often in
higher positions than articles that are cited less often. Therefore, Google
Scholar seems to be more suitable for searching standard literature than for
gems or articles by authors advancing a view different from the mainstream.
However, interesting exceptions for some search queries occurred. In some
cases no correlation existed; in others bizarre patterns were recognizable,
suggesting that citation counts sometimes have no impact at all on articles'
Addresses: [Beel, Joeran; Gipp, Bela] Otto VonGuericke Univ Magdegurg, Dept
Comp Sci, ITI VLBA Lab Scienstein, D-39016 Magdeburg, Germany
Reprint Address: Beel, J, Otto VonGuericke Univ Magdegurg, Dept Comp Sci, ITI
VLBA Lab Scienstein, D-39016 Magdeburg, Germany.
preprint URL: http://www.sciplore.org/publications/2009-
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