-
Wien, C.: Sample sizes and composition : their effect on recall and precision in IR experiments with OPACs (2000)
0.02
0.016857661 = product of:
0.059001815 = sum of:
0.046817202 = weight(_text_:retrieval in 5368) [ClassicSimilarity], result of:
0.046817202 = score(doc=5368,freq=6.0), product of:
0.11553899 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03819578 = queryNorm
0.40520695 = fieldWeight in 5368, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=5368)
0.0121846115 = product of:
0.036553834 = sum of:
0.036553834 = weight(_text_:29 in 5368) [ClassicSimilarity], result of:
0.036553834 = score(doc=5368,freq=2.0), product of:
0.13436082 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03819578 = queryNorm
0.27205724 = fieldWeight in 5368, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0546875 = fieldNorm(doc=5368)
0.33333334 = coord(1/3)
0.2857143 = coord(2/7)
- Abstract
- This article discusses how samples of records for laboratory IR experiments on OPACs can be constructed so that results obtained from different experiments can be compared. The literature on laboratory IR experiments seems to indicate that the retrieval effectiveness (recall and precision) is affected by the way the samples of records for such experiments are generated. Especially the amount of records and the subject area coverage of the records seems to affect the retrieval effectiveness. This article contains suggestions for the construction of samples for laboratory IR experiments on OPACs and demonstrates that the retrieval effectiveness is affected by different sample size and composition.
- Source
- Cataloging and classification quarterly. 29(2000) no.4, S.73-86
-
Kilgour, F.G.; Moran, B.B.; Barden, J.R.: Retrieval effectiveness of surname-title-word searches for known items by academic library users (1999)
0.01
0.005460869 = product of:
0.038226083 = sum of:
0.038226083 = weight(_text_:retrieval in 3061) [ClassicSimilarity], result of:
0.038226083 = score(doc=3061,freq=4.0), product of:
0.11553899 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03819578 = queryNorm
0.33085006 = fieldWeight in 3061, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=3061)
0.14285715 = coord(1/7)
- Abstract
- This article reports the findings of an experiment using a simulated title pages, author surnames, and title words, one-third of which were selected by each of the 3 authors, to determine the frequency of one-screen displays when used to search for known items in an implied Boolean retrieval system. Searches comprising surname plus one significant title word produced one-screen displays 78% of time; surname plus 2 words 97% of the time; and surname plus 3 words 98,5%. Three quarters of the significant words were nouns
-
Borgman, C.L.: Why are online catalogs still hard to use? (1996)
0.00
0.004413049 = product of:
0.030891342 = sum of:
0.030891342 = weight(_text_:retrieval in 4380) [ClassicSimilarity], result of:
0.030891342 = score(doc=4380,freq=8.0), product of:
0.11553899 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03819578 = queryNorm
0.26736724 = fieldWeight in 4380, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03125 = fieldNorm(doc=4380)
0.14285715 = coord(1/7)
- Abstract
- We return to arguments made 10 years ago that online catalogs are difficult to use because their design does not incorporate sufficient understanding of searching behavior. The earlier article examined studies of information retrieval system searching for their implications for online catalog design; this article examines the implications of card catalog design for online catalogs. With this analysis, we hope to contribute to a better understanding of user behavior and to lay to rest the card catalog design model for online catalogs. We discuss the problems with query matching systems, which were designed for skilled search intermediaries rather than end-users, and the knowledge and skills they require in the information-seeking process, illustrated with examples of searching card and online catalogs. Searching requires conceptual knowledge of the information retrieval process - translating an information need into a searchable query; semantic knowledge of how to implement a query in a given system - the how and when to use system features; and technical skills in executing the query - basic computing skills and the syntax of entering queries as specific search statements. In the short term, we can help make online catalogs easier to use through improved training and documentation that is based on information-seeking bahavior, with the caveat that good training is not a substitute for good system design. Our long term goal should be to design intuitive systems that require a minimum of instruction. Given the complexity of the information retrieval problem and the limited capabilities of today's systems, we are far from achieving that goal. If libraries are to provide primary information services for the networked world, they need to put research results on the information-seeking process into practice in designing the next generation of online public access information retrieval systems
-
Hofstede, M.: Literatuur over onderwerpen zoeken in de OPC (1994)
0.00
0.003978649 = product of:
0.027850542 = sum of:
0.027850542 = product of:
0.08355162 = sum of:
0.08355162 = weight(_text_:29 in 5400) [ClassicSimilarity], result of:
0.08355162 = score(doc=5400,freq=2.0), product of:
0.13436082 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03819578 = queryNorm
0.6218451 = fieldWeight in 5400, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.125 = fieldNorm(doc=5400)
0.33333334 = coord(1/3)
0.14285715 = coord(1/7)
- Source
- CRI bulletin. 29(1994), Sept., S.14-15
-
Drabenstott, K.M.; Weller, M.S.: Improving personal-name searching in online catalogs (1996)
0.00
0.003861418 = product of:
0.027029924 = sum of:
0.027029924 = weight(_text_:retrieval in 6742) [ClassicSimilarity], result of:
0.027029924 = score(doc=6742,freq=2.0), product of:
0.11553899 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03819578 = queryNorm
0.23394634 = fieldWeight in 6742, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=6742)
0.14285715 = coord(1/7)
- Abstract
- Reports results of a study to examine the performance of online catalogue searches involving personal names and to recommend improvements to the basic system approach to soliciting user queries and searching for them. The research questions addressed in the study wre: how online systems can chose searching approaches on their own that are likely to produce useful retrieval; how online systems solicit queries from users; and how users respond to an experimental online catalogue that prompts them for the different elements of their personal name queries. Improvements include: the implementation of a new design for online catalogue searching that features search trees; new methods for soliciting user queries bearing personal names; and enlisting the participation of online catalogue users in the evaluation of system prompts, instructions, and messages that request input from them
-
Hancock-Beaulieu, M.; McKenzie, L.; Irving, A.: Evaluative protocols for searching behaviour in online library catalogues (1991)
0.00
0.0034813178 = product of:
0.024369223 = sum of:
0.024369223 = product of:
0.07310767 = sum of:
0.07310767 = weight(_text_:29 in 347) [ClassicSimilarity], result of:
0.07310767 = score(doc=347,freq=2.0), product of:
0.13436082 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03819578 = queryNorm
0.5441145 = fieldWeight in 347, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.109375 = fieldNorm(doc=347)
0.33333334 = coord(1/3)
0.14285715 = coord(1/7)
- Date
- 23. 1.1999 19:52:29
-
Johnson, K.E.: OPAC missing record retrieval (1996)
0.00
0.0033097868 = product of:
0.023168506 = sum of:
0.023168506 = weight(_text_:retrieval in 6735) [ClassicSimilarity], result of:
0.023168506 = score(doc=6735,freq=2.0), product of:
0.11553899 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03819578 = queryNorm
0.20052543 = fieldWeight in 6735, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=6735)
0.14285715 = coord(1/7)
-
Cooper, M.D.; Chen, H.-M.: Predicting the relevance of a library catalog search (2001)
0.00
9.946623E-4 = product of:
0.0069626356 = sum of:
0.0069626356 = product of:
0.020887906 = sum of:
0.020887906 = weight(_text_:29 in 6519) [ClassicSimilarity], result of:
0.020887906 = score(doc=6519,freq=2.0), product of:
0.13436082 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03819578 = queryNorm
0.15546128 = fieldWeight in 6519, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03125 = fieldNorm(doc=6519)
0.33333334 = coord(1/3)
0.14285715 = coord(1/7)
- Date
- 29. 9.2001 17:26:02
