-
Lancaster, F.W.: Indexing and abstracting in theory and practice (1998)
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- Footnote
- Rez. in: JASIS 50(1999) no.8, S.728-730 (J.-E. Mai); Indexer 21(1999) no.3, S.148 (P.F. Booth); Managing information 6(1999) no.1, S.48 (S.T. Clarke); Electronic library 17(1999) no.3, S.193 (F. Parry)
- Pages
- XIII,412 S
-
Lancaster, F.W.: Vocabulary control for information retrieval (1986)
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- Date
- 22. 4.2007 10:07:51
- Pages
- XVII,270 S
-
Su, S.-F.; Lancaster, F.W.: Evaluation of expert systems in reference service applications (1995)
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- Abstract
- Reports results of an evaluation of 2 expert systems designed for use in library reference services: ReferenceExpert (RE), developed by Houston University; and SourceFinder (SF), developed by Illinois University at Urbana-Champaign. The test group consisted of 60 graduate students at the initial stage of an intermediate level reference course. The evaluation involved test questions already used in an earlier study (College and research libraries 52(1991) no.5, S.454-465). Results indicated that: there was no significant difference between RE and SF students in the confidence they expressed regarding understanding of their test questions; no significant correlation was found between confidence in understanding the question and success in selecting appropriate sources; only 1/5 of the students agreed that the system they used could be considered 'intelligent'; the majority did not consider the system they used to be 'competent'; almost half agreed that the subject categories provided by the menus were too broad; a little more than half wer not satisfied with the information sources selected by their system; significantly more RE users than SF users agreed that they found the menu interface useful; and a keyword search capability was the feature most often mentioned as a needed system enhancement. Overall results indicated that current expert systems for the selection of reference sources cannot perform as well as experienced subject oriented reference librarians
- Source
- RQ. 35(1995) no.2, S.219-228
-
Lancaster, F.W.: Evaluating the performance of a large computerized information system (1985)
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- Abstract
- F. W. Lancaster is known for his writing an the state of the art in librarylinformation science. His skill in identifying significant contributions and synthesizing literature in fields as diverse as online systems, vocabulary control, measurement and evaluation, and the paperless society have earned him esteem as a chronicler of information science. Equally deserving of repute is his own contribution to research in the discipline-his evaluation of the MEDLARS operating system. The MEDLARS study is notable for several reasons. It was the first large-scale application of retrieval experiment methodology to the evaluation of an actual operating system. As such, problems had to be faced that do not arise in laboratory-like conditions. One example is the problem of recall: how to determine, for a very large and dynamic database, the number of documents relevant to a given search request. By solving this problem and others attendant upon transferring an experimental methodology to the real world, Lancaster created a constructive procedure that could be used to improve the design and functioning of retrieval systems. The MEDLARS study is notable also for its contribution to our understanding of what constitutes a good index language and good indexing. The ideal retrieval system would be one that retrieves all and only relevant documents. The failures that occur in real operating systems, when a relevant document is not retrieved (a recall failure) or an irrelevant document is retrieved (a precision failure), can be analysed to assess the impact of various factors an the performance of the system. This is exactly what Lancaster did. He found both the MEDLARS indexing and the McSH index language to be significant factors affecting retrieval performance. The indexing, primarily because it was insufficiently exhaustive, explained a large number of recall failures. The index language, largely because of its insufficient specificity, accounted for a large number of precision failures. The purpose of identifying factors responsible for a system's failures is ultimately to improve the system. Unlike many user studies, the MEDLARS evaluation yielded recommendations that were eventually implemented.* Indexing exhaustivity was increased and the McSH index language was enriched with more specific terms and a larger entry vocabulary.
- Footnote
- Original in: Journal of the American Medical Association 207(1969) S.114-120.
- Pages
- S.326-339
-
Lancaster, F.W.; Warner, A.J.: Information retrieval today (1993)
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- Footnote
- Rez. in: Information processing and management 30(1994) no.4, S.581-582 (L. Schamber); Journal of documentation 51(1995) no.1, S.76-77 (B. Frohmann)
- Pages
- XVIII,341 S
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Lancaster, F.W.: Indexing and abstracting in theory and practice (1991)
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- Footnote
- Rez. in: Library and information science resaerch 14(1992) no.1, S.117-118 (C. Tenopir); International classification 19(1992) no.4, S.227-228 (R. Fugmann); Journal of the American Society for Information Science 43(1992) no.6, S.456 (B.R. Boyce); Cataloging & classification quarterly 15(1992) no.1, S.245-247 (E.M. Rasmussen) Journal of academic librarianship 18(1992) no.1, S.39 (G.A. Crawford) // Winner of the 1992 ASIS best information science book award
- Pages
- XIV,328 S
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Lancaster, F.W.: MEDLARS : report on the evaluation of its operating effiency (1961)
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- Footnote
- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.223-246.
- Source
- American documentation. 20(1969), S.119-142
-
Lancaster, F.W.; Zeter, M.J.; Metzler, L.: Ranganathan's influence examined bibliometrically (1992)
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- Source
- Libri. 42(1992) no.3, S.268-281
-
Lancaster, F.W.: Vocabulary control in information retrieval systems (1977)
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- Source
- Advances in librarianship. 7(1977), S.1-40
-
Lancaster, F.W.; Mills, J.: Testing indexes and index language devices : the ASLIB Cranfield project (1964)
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- Source
- American documentation. 15(1964), S.4-13
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Lancaster, F.W.; Gillespie, C.J.: Design and evaluation of information systems (1970)
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- Source
- Annual review of information science and technology. 5(1970), S.33-70
-
Lancaster, F.W.; Elliker, C.; Connell, T.H.: Subject analysis (1989)
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- Source
- Annual review of information science and technology. 24(1989), S.35-84
-
Lancaster, F.W.; Li, J.: ¬The law of constant accessibility of information (1988/89)
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- Source
- Bulletin of the American Society for Information Science. 15(1988/89), S.24-25
-
Lancaster, F.W.: Evaluation of expert systems in information service applications (1994)
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- S. -
-
Lancaster, F.W.: Evaluation within the environment of an operating information service (1981)
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- Pages
- S.105-127
-
Pinto, M.; Lancaster, F.W.: Abstracts and abstracting in knowledge discovery (1999)
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- Source
- Library trends. 48(1999) no.1, S.234-248
-
Lancaster, F.W.; Connell, T.H.; Bishop, N.; McCowan, S.: Identifying barriers to effective subject access in library catalogs (1991)
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- Abstract
- 51 subject searches were performed in an online catalog containing about 4,5 million records. Their success was judges in terms of lists of items, known to be relevant to the various topics, compiled by subject specialists (faculty members or authors of articles in specialized encyclopedias). Many of the items known to be relevant were not retrieved, even in very broad searches that sometimes retrieved several hundred records, and very little could be done to make them retrievable within the constraints of present cataloging practice. Librarians should recognize that library catalogs, as now implemented, offer only the most primitive of subject access and should seek to develop different types of subject access tools. - Vgl auch Letter (B.H. Weinberg) in: LTRS 36(1992) S.123-124.
- Source
- Library resources and technical services. 35(1991), S.377-391
-
Lancaster, F.W.: ¬The evolution of electronic publishing (1995)
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- Source
- Library trends. 43(1995) no.4, S.518-527
-
Lancaster, F.W.: Do indexing and abstracting have a future? (2003)
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- Source
- Anales de documentación. 6(2003), S.277-288
-
Lancaster, F.W.: Librarians, technology and mediocrity (1993)
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- Pages
- S.99-113
- Source
- Opportunity 2000: understanding and serving users in an electronic library; 15th Int. Symp., 12.-15.10.1992; Festschrift in honour of Herbert S. White. Ed.: A.H. Helal
