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Journal cover: Online Information Review

Online Information Review

ISSN: 1468-4527

Online from: 1977

Subject Area: Library and Information Studies

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Visualizing overlap and rank differences among web-wide search engines: Some free tools and services


Document Information:
Title:Visualizing overlap and rank differences among web-wide search engines: Some free tools and services
Author(s):Péter Jacsó, (University of Hawaii, Manoa, Hawaii, USA)
Citation:Péter Jacsó, (2005) "Visualizing overlap and rank differences among web-wide search engines: Some free tools and services", Online Information Review, Vol. 29 Iss: 5, pp.554 - 560
Keywords:Information retrieval, Search engines, Search output
Article type:General review
DOI:10.1108/14684520510628927 (Permanent URL)
Publisher:Emerald Group Publishing Limited
Abstract:

Purpose – To compare the performance of different search engines, highlighting the overlap and rank differences.

Design/methodology/approach – Presents results of an overlap test search series among traditional CD-ROM indexing/abstracting databases since the mid-1980s, web databases, and authors' own polysearch engine, and reviews Google Scholar.

Findings – Finds that overlap is minimal among web-wide search engines which crawl and index the mostly unstructured open web; and that overlap among Google Scholar and the native search engines is far less than the ideal 100 per cent in the optimal context of crawling and indexing highly-structured and metadata-rich collections.

Originality/value – Reinforces the existing view that for comprehensive searches one must search more than one database. Highlights and recommends several very good search engine sites.



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