Search (12 results, page 1 of 1)

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Abstract

Presents a brief report on a study, carried out by the Centre for Interactive Systems Research, City University, to investigate the techniques used for evaluating OPACs: to explore and assess different data gathering methods in studying information seeking behaviour at the on-line catalogue; and to examine how a transaction logging facility could be enhanced to serve as a more effective diagnostic tool. For a full report see British Library research paper 78

Pages

S.20-22

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Abstract

Reports on the design of a GUI for the Okapi 'best match' retrieval system developed at the Centre for Interactive Systems Research, City University, UK, for online library catalogues. The X-Windows interface includes an interactive query expansion (IQE) facilty which involves the user in the selection of query terms to reformulate a search. Presents the design rationale, based on a game board metaphor, and describes the features of each of the stages of the search interaction. Reports on the early operational field trial and discusses relevant evaluation issues and objectives

Source

Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon

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Abstract

Briefly reviews research on users and online catalogues, focusing on the different data gathering methodologies. OLIVE, an enhanced facility for logging transactions and introducing online questionnaires as a front end to a personal computer, was used to examine user intentions, search formulations and success ratings on several commercial systems. Describes a third generation system, OKAPI, which addresses some of the issues raised by the user feedback

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Abstract

Assesses the appropriateness of graphic user interfaces (GUI), and more specifically the Windows based interfaces used for CD-ROM database applications. An evaluation model was devised to carry out an expert evaluation of the interfaces of 7 CD-ROM databases: Economist on CD-ROM; ADMYTE (Digital Archive of Spanish Texts and Manuscripts); English Poetry (Chadwyck-Healey); Oxford English Dictionary 2nd ed. on CD-ROM; Perinorm; OVID Medline and WinSPIRS Medline. The model identified 2 levels of interaction, the dialogue level aand the task level, and focused on general interface features, search and retrieval tasks, and output and processing options as well as the help facilities. Results are discussed in the light of HCI Usability Criteria and design guidelines (including general interface design guidelines, specific Windows design guidelines and the CD-ROM Consistent Interface Guidelines) to assess to what extent the applications comply and appropriate recommendations make

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Abstract

Discusses evaluation and methods of evaluation of OPACs in the context of user orientated qualitative research. Provides a state of the art review of experimental approaches and analytical data gathering methods applied to on-line catalogues and appropriate evalutative criteria. Suggests the development of more effective diagnostic, monitoring and prototyping tools.

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Abstract

An investigation of tools, techniques, and methods for the evaluation of interactive library catalogues is described, with emphasis on diagnostic methods and on use of the catalogue in a wider context of user information seeking behaviour. A front-end system (Olive) was developed to test verious enhancements of traditional transaction logging as a data-gathering technique for evaluation purposes. These include full-screen logging, pre- and post-search, online/offline, and in-search interactive questionnaires, search replys as well as talk-aloud. The extent of subject or hybrid searching activity as opposed to specific item searching is also highlighted

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Abstract

Reports on the state-of-the art of online catalogues and considers propects for future developments. Describes the background and origins of OPACs. Considers the limitations of second generation systems which are failing to meet the needs of users. Examines new approaches to their design which include: user-centre design, interface design, use of advanced retrieval techniques, and their use in the network environment. Considers future developments of OPACs taking into account developments in other electronic information sources

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Abstract

The second half of a 'before and after' study to evaluate the impact of an online catalogue on subject searching behaviour is reported. A holistic approach is adopted encompassing both catalogue use and browsing at the shelves for catalogue users and non-users. Verbal and non-verbal data were elicited from searchers using a combined methodology including talk-aloud technique, observation and a screen logging facility. An extensive qualitative analysis was carried out correlating expressed topics, search formulation strategies and documents retrieved at the shelves. The online catalogue environment does not appear to have increased the extent of subject searching nor the use of the bibliographic tool. The manual PRECIS index supported a contextual approach for broad and more interactive search formulations whereas the OPAC encouraged a matching approach and narrow formulations with fewer but user generated formulations. The success rate of the online catalogue was slightly better than that of the manual tools but fewer items were retrieved at the shelves. Non-users of the bibliographic tools seemed to be just as successful. To improve retrieval effectiveness it is suggested that online catalogues should cater for both matching and contextual approaches to searching. Recent research indicates that a more interactive process could be promoted by providing query expansion through a combination of searching aids for matching, for search formulation assistance and for structured contextual retrieval

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Abstract

OLIVE, a transaction logging facility enhanced with online questionnaires, was used to collect data from users of public and academic library catalogues. The comparative analysis of subject searching behaviour focused on the role of browsing subject headings and brief references in search formulation. Opportunities for browsing are greatly constrained by indexing practices. It is suggested that a more integrated approach to pre-coordinate and post-coordinate searching would be more effective. The logging software has been developed for a number of commercial online catalogues including Geac, CLSI and LIBERTAS. The use of a diagnostic and monitoring tool in the evaluation of OPACs is advocated

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Abstract

In principle, the 'knowledge' encoded in a thesaurus can be exploited in many ways to help users clarify their information needs and enhance query performance, but attempts to automate this process via AI techniques face many practical difficulties. In the short term it may be more useful to improve support for direct interactive use of thesauri. We discuss some of the issues which have arisen when building an interface for thesaurus navigation and query enhancement, drawing on logs and user feedback from ongoing small-scale experiments

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Abstract

An online library catalogue served as a testbed to evaluate an interactive query expansion facility based on relevance feedback for the Okapi probabilistic term weighting retrieval system. The facility was implemented in a graphical user interface (GUI) environment using a game-board metaphor for the search process, and allowed searchers to select candidate terms extracted from relevant retrieved itms to reformulate queries. The take-up of the interactive query expansion option was found to be lower, and its retrieval performance less effective, compared to previous tests featuring automatic query expansion. Contributory factors including the number, presentation and source of terms are discussed

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Abstract

Describes the OKAPI projects and OKAPI's development as an experimental online catalogue system over 10 years, first at the University of Westminster (formerly the Polytechnique of Central London) and subsequently at City University, London. The 1st OKAPI project in 1984 introduced 'best match' retrieval and focused on the user interface design. The 2nd investigated word stemming, spelling correction and cross reference tables as retrieval aids. A comparative study of 2 library catalogues was undertaken in 1987, while in 1988 query expansion and relevance feedback were introduced and evaluated by laboratory tests. In 1990 live evaluation of automatic query expansion was carried out and in 1993 subject enhancement of bibliographic records was investigated. The latest project has examined the design of a graphical user interface to support interactive query expansion. Discusses the research and evaluation of each project