-
Foster, A.; Ford, N.: Serendipity and information seeking : an empirical study (2003)
0.03
0.032519635 = product of:
0.06503927 = sum of:
0.06503927 = product of:
0.13007854 = sum of:
0.13007854 = weight(_text_:n in 1083) [ClassicSimilarity], result of:
0.13007854 = score(doc=1083,freq=2.0), product of:
0.19504215 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.045236014 = queryNorm
0.6669253 = fieldWeight in 1083, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.109375 = fieldNorm(doc=1083)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Kuriyama, K.; Kando, N.; Nozue, T.; Eguchi, K.: Pooling for a large-scale test collection : an analysis of the search results from the First NTCIR Workshop (2002)
0.03
0.027873974 = product of:
0.05574795 = sum of:
0.05574795 = product of:
0.1114959 = sum of:
0.1114959 = weight(_text_:n in 3830) [ClassicSimilarity], result of:
0.1114959 = score(doc=3830,freq=2.0), product of:
0.19504215 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.045236014 = queryNorm
0.57165027 = fieldWeight in 3830, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.09375 = fieldNorm(doc=3830)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Hawking, D.; Craswell, N.: ¬The very large collection and Web tracks (2005)
0.03
0.027873974 = product of:
0.05574795 = sum of:
0.05574795 = product of:
0.1114959 = sum of:
0.1114959 = weight(_text_:n in 5085) [ClassicSimilarity], result of:
0.1114959 = score(doc=5085,freq=2.0), product of:
0.19504215 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.045236014 = queryNorm
0.57165027 = fieldWeight in 5085, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.09375 = fieldNorm(doc=5085)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000)
0.02
0.021450995 = product of:
0.04290199 = sum of:
0.04290199 = product of:
0.08580398 = sum of:
0.08580398 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
0.08580398 = score(doc=6438,freq=2.0), product of:
0.15840882 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045236014 = queryNorm
0.5416616 = fieldWeight in 6438, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=6438)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 11. 8.2001 16:22:19
-
Palmquist, R.A.; Kim, K.-S.: Cognitive style and on-line database search experience as predictors of Web search performance (2000)
0.01
0.013936987 = product of:
0.027873974 = sum of:
0.027873974 = product of:
0.05574795 = sum of:
0.05574795 = weight(_text_:n in 4605) [ClassicSimilarity], result of:
0.05574795 = score(doc=4605,freq=2.0), product of:
0.19504215 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.045236014 = queryNorm
0.28582513 = fieldWeight in 4605, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.046875 = fieldNorm(doc=4605)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This study sought to investigate the effects of cognitive style (field dependent and field independent) and on-line database search experience (novice and experienced) on the WWW search performance of undergraduate college students (n=48). It also attempted to find user factors that could be used to predict search efficiency. search performance, the dependent variable was defined in 2 ways: (1) time required for retrieving a relevant information item, and (2) the number of nodes traversed for retrieving a relevant information item. the search tasks required were carried out on a University Web site, and included a factual task and a topical search task of interest to the participant. Results indicated that while cognitive style (FD/FI) significantly influenced the search performance of novice searchers, the influence was greatly reduced in those searchers who had on-line database search experience. Based on the findings, suggestions for possible changes to the design of the current Web interface and to user training programs are provided
-
Alemayehu, N.: Analysis of performance variation using quey expansion (2003)
0.01
0.013936987 = product of:
0.027873974 = sum of:
0.027873974 = product of:
0.05574795 = sum of:
0.05574795 = weight(_text_:n in 1454) [ClassicSimilarity], result of:
0.05574795 = score(doc=1454,freq=2.0), product of:
0.19504215 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.045236014 = queryNorm
0.28582513 = fieldWeight in 1454, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.046875 = fieldNorm(doc=1454)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
MacFarlane, A.: Evaluation of web search for the information practitioner (2007)
0.01
0.013936987 = product of:
0.027873974 = sum of:
0.027873974 = product of:
0.05574795 = sum of:
0.05574795 = weight(_text_:n in 817) [ClassicSimilarity], result of:
0.05574795 = score(doc=817,freq=2.0), product of:
0.19504215 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.045236014 = queryNorm
0.28582513 = fieldWeight in 817, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.046875 = fieldNorm(doc=817)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Purpose - The aim of the paper is to put forward a structured mechanism for web search evaluation. The paper seeks to point to useful scientific research and show how information practitioners can use these methods in evaluation of search on the web for their users. Design/methodology/approach - The paper puts forward an approach which utilizes traditional laboratory-based evaluation measures such as average precision/precision at N documents, augmented with diagnostic measures such as link broken, etc., which are used to show why precision measures are depressed as well as the quality of the search engines crawling mechanism. Findings - The paper shows how to use diagnostic measures in conjunction with precision in order to evaluate web search. Practical implications - The methodology presented in this paper will be useful to any information professional who regularly uses web search as part of their information seeking and needs to evaluate web search services. Originality/value - The paper argues that the use of diagnostic measures is essential in web search, as precision measures on their own do not allow a searcher to understand why search results differ between search engines.
-
Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001)
0.01
0.012257711 = product of:
0.024515422 = sum of:
0.024515422 = product of:
0.049030844 = sum of:
0.049030844 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
0.049030844 = score(doc=261,freq=2.0), product of:
0.15840882 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045236014 = queryNorm
0.30952093 = fieldWeight in 261, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=261)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Die deutschen Suchmaschinen, Abacho, Acoon, Fireball und Lycos sowie die Web-Kataloge Web.de und Yahoo! werden einem Qualitätstest nach relativem Recall, Precision und Availability unterzogen. Die Methoden der Retrievaltests werden vorgestellt. Im Durchschnitt werden bei einem Cut-Off-Wert von 25 ein Recall von rund 22%, eine Precision von knapp 19% und eine Verfügbarkeit von 24% erreicht
-
¬The Eleventh Text Retrieval Conference, TREC 2002 (2003)
0.01
0.012257711 = product of:
0.024515422 = sum of:
0.024515422 = product of:
0.049030844 = sum of:
0.049030844 = weight(_text_:22 in 4049) [ClassicSimilarity], result of:
0.049030844 = score(doc=4049,freq=2.0), product of:
0.15840882 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045236014 = queryNorm
0.30952093 = fieldWeight in 4049, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=4049)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Proceedings of the llth TREC-conference held in Gaithersburg, Maryland (USA), November 19-22, 2002. Aim of the conference was discussion an retrieval and related information-seeking tasks for large test collection. 93 research groups used different techniques, for information retrieval from the same large database. This procedure makes it possible to compare the results. The tasks are: Cross-language searching, filtering, interactive searching, searching for novelty, question answering, searching for video shots, and Web searching.
-
Mansourian, Y.; Ford, N.: Web searchers' attributions of success and failure: an empirical study (2007)
0.01
0.009291325 = product of:
0.01858265 = sum of:
0.01858265 = product of:
0.0371653 = sum of:
0.0371653 = weight(_text_:n in 840) [ClassicSimilarity], result of:
0.0371653 = score(doc=840,freq=2.0), product of:
0.19504215 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.045236014 = queryNorm
0.19055009 = fieldWeight in 840, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.03125 = fieldNorm(doc=840)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Mansourian, Y.; Ford, N.: Search persistence and failure on the web : a "bounded rationality" and "satisficing" analysis (2007)
0.01
0.009291325 = product of:
0.01858265 = sum of:
0.01858265 = product of:
0.0371653 = sum of:
0.0371653 = weight(_text_:n in 841) [ClassicSimilarity], result of:
0.0371653 = score(doc=841,freq=2.0), product of:
0.19504215 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.045236014 = queryNorm
0.19055009 = fieldWeight in 841, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.03125 = fieldNorm(doc=841)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Leininger, K.: Interindexer consistency in PsychINFO (2000)
0.01
0.0091932835 = product of:
0.018386567 = sum of:
0.018386567 = product of:
0.036773134 = sum of:
0.036773134 = weight(_text_:22 in 2552) [ClassicSimilarity], result of:
0.036773134 = score(doc=2552,freq=2.0), product of:
0.15840882 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045236014 = queryNorm
0.23214069 = fieldWeight in 2552, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=2552)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 9. 2.1997 18:44:22
-
King, D.W.: Blazing new trails : in celebration of an audacious career (2000)
0.01
0.0076610697 = product of:
0.0153221395 = sum of:
0.0153221395 = product of:
0.030644279 = sum of:
0.030644279 = weight(_text_:22 in 1184) [ClassicSimilarity], result of:
0.030644279 = score(doc=1184,freq=2.0), product of:
0.15840882 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045236014 = queryNorm
0.19345059 = fieldWeight in 1184, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=1184)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 9.1997 19:16:05
-
Petrelli, D.: On the role of user-centred evaluation in the advancement of interactive information retrieval (2008)
0.01
0.0076610697 = product of:
0.0153221395 = sum of:
0.0153221395 = product of:
0.030644279 = sum of:
0.030644279 = weight(_text_:22 in 2026) [ClassicSimilarity], result of:
0.030644279 = score(doc=2026,freq=2.0), product of:
0.15840882 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045236014 = queryNorm
0.19345059 = fieldWeight in 2026, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=2026)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Information processing and management. 44(2008) no.1, S.22-38
-
Larsen, B.; Ingwersen, P.; Lund, B.: Data fusion according to the principle of polyrepresentation (2009)
0.01
0.0061288555 = product of:
0.012257711 = sum of:
0.012257711 = product of:
0.024515422 = sum of:
0.024515422 = weight(_text_:22 in 2752) [ClassicSimilarity], result of:
0.024515422 = score(doc=2752,freq=2.0), product of:
0.15840882 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045236014 = queryNorm
0.15476047 = fieldWeight in 2752, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03125 = fieldNorm(doc=2752)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 3.2009 18:48:28
