-
Bilal, D.: Ranking, relevance judgment, and precision of information retrieval on children's queries : evaluation of Google, Yahoo!, Bing, Yahoo! Kids, and ask Kids (2012)
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- Abstract
- This study employed benchmarking and intellectual relevance judgment in evaluating Google, Yahoo!, Bing, Yahoo! Kids, and Ask Kids on 30 queries that children formulated to find information for specific tasks. Retrieved hits on given queries were benchmarked to Google's and Yahoo! Kids' top-five ranked hits retrieved. Relevancy of hits was judged on a graded scale; precision was calculated using the precision-at-ten metric (P@10). Yahoo! and Bing produced a similar percentage in hit overlap with Google (nearly 30%), but differed in the ranking of hits. Ask Kids retrieved 11% in hit overlap with Google versus 3% by Yahoo! Kids. The engines retrieved 26 hits across query clusters that overlapped with Yahoo! Kids' top-five ranked hits. Precision (P) that the engines produced across the queries was P = 0.48 for relevant hits, and P = 0.28 for partially relevant hits. Precision by Ask Kids was P = 0.44 for relevant hits versus P = 0.21 by Yahoo! Kids. Bing produced the highest total precision (TP) of relevant hits (TP = 0.86) across the queries, and Yahoo! Kids yielded the lowest (TP = 0.47). Average precision (AP) of relevant hits was AP = 0.56 by leading engines versus AP = 0.29 by small engines. In contrast, average precision of partially relevant hits was AP = 0.83 by small engines versus AP = 0.33 by leading engines. Average precision of relevant hits across the engines was highest on two-word queries and lowest on one-word queries. Google performed best on natural language queries; Bing did the same (P = 0.69) on two-word queries. The findings have implications for search engine ranking algorithms, relevance theory, search engine design, research design, and information literacy.
-
Bradley, P.: Advanced Internet searcher's handbook (1998)
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-
Hock, R.: ¬The extreme searcher's guide to Web search engines : a handbook for the serious searcher (1999)
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- Footnote
- Rez. in: Electronic library 17(1999) no.5, S.334-335 (P. Barker)
-
Burke, J.: IntroNet : a beginner's guide to searching the Internet (1999)
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- Footnote
- Rez. in: Electronic library 18(2000) no.4, S.294-295 (J. Edwards); Teacher librarian 27(1999) S.50 (P. Genco)
-
Price, A.: Five new Danish subject gateways under development (2000)
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- Date
- 22. 6.2002 19:41:31
-
Jepsen, E.T.; Seiden, P.; Ingwersen, P.; Björneborn, L.; Borlund, P.: Characteristics of scientific Web publications : preliminary data gathering and analysis (2004)
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-
Wu, L.-L.; Chuang, Y.-L.; Chen, P.-Y.: Motivation for using search engines : a two-factor model (2008)
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- Footnote
- Vgl.: Wu, L.-L., A. Chuang u. P.-Y. Chen: Correction to Wu, L., Chuang, A., & Chen, P. (2008). Motivation for using search engines: A two factor model. Journal of American Society for Information Science and Technology, 59(11), 1829-1840. In: Journal of the American Society for Information Science and Technology. 61(2010) no.1, S.214-216.
-
Haveliwala, T.; Kamvar, S.: ¬The second eigenvalue of the Google matrix (2003)
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- Abstract
- We determine analytically the modulus of the second eigenvalue for the web hyperlink matrix used by Google for computing PageRank. Specifically, we prove the following statement: "For any matrix A=(cP + (1-c)E)**T, where P is an nxn row-stochasticmatrix, E is a nonnegative nxn rank-one row-stochastic matrix, and 0<=c<=1, the second eigenvalue of A has modulus Betrag (Lambda_sub2)<=c. Furthermore, if P has at least two irreducible closed subsets, the second eigenvalue Lambda_sub2 = c." This statement has implications for the convergence rate of the standard PageRank algorithm as the web scales, for the stability of PageRank to perturbations to the link structure of the web, for the detection of Google spammers, and for the design of algorithms to speed up PageRank.
-
Blake, P.: AltaVista and Notes for the web (1996)
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-
Zorn, P.: Advanced web searching : tricks of the trade (1996)
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-
Blake, P.: CyberHound sniffs out the right sites (1996)
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-
Brueggeman, P.: Full text Web indexes (1997)
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-
Clarke, S.J.; Willett, P.: Estimating the recall performance of Web search engines (1997)
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-
¬The Internet searcher's handbook : locating information, people and software (1996)
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- Editor
- Morville, P., L. Rosenfeld u. J. James
-
Jascó, P.: Northern Light (1998)
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-
Granum, G.; Barker, P.: ¬An EASIER way to search online engineering resource (2000)
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Broder, A.; Kumar, R.; Maghoul, F.; Raghavan, P.; Rajagopalan, S.; Stata, R.; Tomkins, A.; Wiener, J.: Graph structure in the Web (2000)
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-
Conhaim, W.W.: Search tools (1996)
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- Date
- 1. 8.1996 22:39:31
-
Fong, W.W.: Searching the World Wide Web (1996)
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- Source
- Journal of library and information science. 22(1996) no.1, S.15-36
-
Duval, B.K.; Main, L.: Searching on the Net : general overview (1996)
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- Date
- 6. 3.1997 16:22:15
