Search (60 results, page 1 of 3)

  • × theme_ss:"Benutzerstudien"
  • × year_i:[1990 TO 2000}
  1. Sullenger, P.: ¬A serials transaction log analysis (1997) 0.04 
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    Abstract
    A transaction log analysis of searches for serials looks at how users go about their searching (by title, subject, or keyword) and what problems they encounter, and then examines the results of those searches. Explores ways in which serials records could be improved to enhance retrieval
    Date
    29. 7.1998 10:54:49
  2. Hochheiser, H.; Shneiderman, B.: Understanding patterns of user visits to Web sites : Interactive Starfield visualizations of WWW log data (1999) 0.04 
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    Abstract
    HTTP server log files provide Web site operators with substantial detail regarding the visitors to their sites. Interest in interpreting this data has spawned an active market for software packages that summarize and analyze this data, providing histograms, pie graphs, and other charts summarizing usage patterns. While useful, these summaries obscure useful information and restrict users to passive interpretation of static displays. Interactive starfield visualizations can be used to provide users with greater abilities to interpret and explore web log data. By combining two-dimensional displays of thousands of individual access requests, color and size coding for additional attributes, and facilities for zooming and filtering, these visualizations provide capabilities for examining data that exceed those of traditional web log analysis tools. We introduce a series of interactive starfield visualizations, which can be used to explore server data across various dimensions. Possible uses of these visualizations are discussed, and difficulties of data collection, presentation, and interpretation are explored
  3. Berger, M.; Moore, M.J.: ¬The user meets the MELVYL system (1996) 0.02 
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    Abstract
    Reports on a study carried out by the Division of Library Automation, University of California, into the characteristics of use and the success rates of users searching the MELVYL Catalog and Ten-Year databases. Examines a series of user sessions extracted randomly from the MELVYL transaction log and developing a profile of online system use. 1.444 sessions were chosen from 11-17 Apr 92. 3 levels of use were examined: the individual command, the search objective, and the session. Details the findings, and discusses their design implications
    Date
    29. 1.1996 12:21:39
  4. Zink, D.: Monitoring user search success through transaction log analysis : the WolfPAC example (1991) 0.02 
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  5. Ciliberti, A.: Empty handed? : a material availability study and transaction log analysis verification (1998) 0.02 
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  6. Blecic, D.D.: Using transaction log analysis to improve OPAC retrieval results (1998) 0.02 
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    Abstract
    Reports results of the work of the Transaction Logs Task Force, composed of public and technical services librarians charged with reviewing OPAC to identify library wide problems and issues. This OPAC transaction log analysis study compared data derived from 2 sets of logs within a 6 month period. Analysis of the first set of data revealed that users experienced difficulty with basic searching techniques. The OPAC introductory screens were simplified and clarified to help users improve search success rates. The second set of data, analyzed after screen changes had been made, showed statistically significant differences in search results. Concludes that regular monitoring of OPACs through transaction log analysis can lead to improved retrieval when changes are made in response to an analysis of user search patterns
  7. McCurley, H.H.; Weisbrod, E.J.: Use of series title authority cross-references at a large university library (1996) 0.01 
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    Abstract
    Reports results of a study, conducted at the Ralph Brown Draughton Library, Auburn University, Alabama, to determine whether users employ the cross references provided by the series title authority file in their searches of the library's OPAC. Presents and discusses the results of a transaction log analysis focusing attention on the usefulness of cross references from series title authority records, since only searches that required such cross reference appeared in the transaction log report. Results indicate that users do use the cross references gathered by series title authority records
  8. Hunter, R.N.: Successes and failures of patrons searching the online catalog at a large academic library : a transaction log analysis (1991) 0.01 
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    Abstract
    This article reports on a transaction log study of the BIS online catalog at North Caroline State University. Transaction logs were used to gather data on failure rates, usage patterns, and causes of problems. The result show that 54 percent of the searches analyzed failed. Subject searching was the most often used but least successful search. Problems experienced by patrons searching BIS were often due to a misunderstanding of how to operate the system, typographical errors, and the use of uncontrolled vocabulary. As in earlier studies, transaction logs analysis proved to be a fruitful and practical methodology for studying users' searching behaviour in an online catalog.
  9. Spink, A.; Wilson, T.; Ellis, D.; Ford, N.: Modeling users' successive searches in digital environments : a National Science Foundation/British Library funded study (1998) 0.01 
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    Abstract
    As digital libraries become a major source of information for many people, we need to know more about how people seek and retrieve information in digital environments. Quite commonly, users with a problem-at-hand and associated question-in-mind repeatedly search a literature for answers, and seek information in stages over extended periods from a variety of digital information resources. The process of repeatedly searching over time in relation to a specific, but possibly an evolving information problem (including changes or shifts in a variety of variables), is called the successive search phenomenon. The study outlined in this paper is currently investigating this new and little explored line of inquiry for information retrieval, Web searching, and digital libraries. The purpose of the research project is to investigate the nature, manifestations, and behavior of successive searching by users in digital environments, and to derive criteria for use in the design of information retrieval interfaces and systems supporting successive searching behavior. This study includes two related projects. The first project is based in the School of Library and Information Sciences at the University of North Texas and is funded by a National Science Foundation POWRE Grant <http://www.nsf.gov/cgi-bin/show?award=9753277>. The second project is based at the Department of Information Studies at the University of Sheffield (UK) and is funded by a grant from the British Library <http://www.shef. ac.uk/~is/research/imrg/uncerty.html> Research and Innovation Center. The broad objectives of each project are to examine the nature and extent of successive search episodes in digital environments by real users over time. The specific aim of the current project is twofold: * To characterize progressive changes and shifts that occur in: user situational context; user information problem; uncertainty reduction; user cognitive styles; cognitive and affective states of the user, and consequently in their queries; and * To characterize related changes over time in the type and use of information resources and search strategies particularly related to given capabilities of IR systems, and IR search engines, and examine changes in users' relevance judgments and criteria, and characterize their differences. The study is an observational, longitudinal data collection in the U.S. and U.K. Three questionnaires are used to collect data: reference, client post search and searcher post search questionnaires. Each successive search episode with a search intermediary for textual materials on the DIALOG Information Service is audiotaped and search transaction logs are recorded. Quantitative analysis includes statistical analysis using Likert scale data from the questionnaires and log-linear analysis of sequential data. Qualitative methods include: content analysis, structuring taxonomies; and diagrams to describe shifts and transitions within and between each search episode. Outcomes of the study are the development of appropriate model(s) for IR interactions in successive search episodes and the derivation of a set of design criteria for interfaces and systems supporting successive searching.
  10. Wyly, B.J.: From access point to materials : a transaction log analysis of access point value for online catalog users (1996) 0.01 
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    Abstract
    Reports results of a study to investigate judgements made by searchers of online catalogues by using transaction log analysis to associate online catalogue searchmethods with decisions so as to retrieve location information. The study used the Mainframe Interface to Libraries Online (MILO), an interface to the Illinois Library Computer Systems Office (ILCSO) online union catalogue for the 45 academic libraries belonging to ILCSO. MILO provides access to a bibliographic database and directly links to another database with circulation and location records. As the latter database only provides location and circulation status, searchers' decisions to make links to such data are seen as an indication that the records being linked represent potentially useful material. Via a transaction log analysis, the linked location records were associated wiht the access points used to retrieve them in order to analyze the value and problems of searchers' uses of specific access points. Transaction logs were analyzed for a 38-day sample of the 1994 logs. Counting of records retrieved through the use of multiple access points (making the total greater than 100%), subject fields were used to access over 30%, author fields to access over 19%, and title fields to access over 51% of all records linked to location information. Other fields were used to retrieve very small percentages of linked records
  11. Bangalore, N.S.: Re-engineering the OPAC using transaction logs (1997) 0.01 
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    Abstract
    Describes an attempt, by Illinois University at Chicago (IUC) Library to respond to user needs as they are revealed in transaction logs of OPAC use. Illustrates success in improving access to catalogue records through a reengineering process. Outlines the IUC Library Reengineering Project, the administrative structure to study transaction logs, and the resultant managerial decisions. Notes the changes made to sreen display and to the OPAC. Focusing on customer satisfaction, IUC catalogue librarians joined forces with colleagues to identify Usrs' unmet needs and preferences through transaction log analysis. In order to minimize mismatches between users' expectations and services actually provided, IUC catalogue librarians studied logs and adjusted the OPAC. Descrinbes the specific efforts to increase access to the library's collections and the steps taken to enhance and customize bibliographic and authority records. Concludes that transition log analysis has enabled IUC to alter the form and content of its OPAC to fit the changing needs of diverse and widely disoersed users
  12. Seymour, S.: Online public access catalog user studies : a review of research methodologies, March 1986-November 1989 (1991) 0.01 
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    Abstract
    Reviews studies of users of OPACs focusing on the research methodology of librarians. Surveys and questionnaires, interviews, observation, controlled experiment and transaction log analysis were used with varying degrees of expertise and success in academic public libraries with a variety of user populations. Poor methodology due to lack of training and funding sharply limit their usefulness in most cases
  13. Akeroyd, J.: Information seeking in online catalogues (1990) 0.01 
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    Abstract
    Three different interfaces for online public access catalogues were evaluated using transaction logging as a methodology. In two cases exercises were set and run against each interface so that results could be critically evaluated to indicate areas of weakness. In all cases a random transaction log was derived and this was used to diagnose system problems and identify patterns of behaviour. Results showed that searches were often difficult to categorise, users employing different approaches to the same end. Users also were prepared to undertake sustained searching until something was retrieved; however they then frequently stopped. Search input problems are also identified and possible areas for further research suggested
  14. Hancock-Beaulieu, M.: ¬A comparative transaction log analysis of browsing and search formulation in online catalogues (1993) 0.01 
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  15. Pasanen-Tuomainen, I.: Monitoring online catalogues in the Nordic technological university libraries (1992) 0.01 
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    Abstract
    NORDINFO financed project to evaluate OPACs from the end user's viewpoint began in Aug 91 and was aimed at discovering how different types of users carry out searches; how the different methods of describing a publication's contact are used; and evaluating how title, thesauri words and free text are combined in searching using the transaction log analysis method over a 6 week period. The results show that not even menus give enough guidance to an occasional user; free text searching was the most popular method; scan commands proved not popular. The number of searches retrieving no-references was similar in all libraries, while libraries differed in the truncated search terms. Multilingualism was a serious problem in all the online catalogues. Lists recommended improvements
  16. Nicholas, D.: Are information professionals really better online searchers than end-users? : (and whose story do you believe?) (1995) 0.01 
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    Abstract
    Examines the searching behaviour of Guardian journalists searching FT PROFILE online system. Using transactional log analysis compares the searching styles of journalists with those of Guardian librarians. In some respects end users conform to the picture that professionals have of them - they search with a very limited range of commands - but in other respects they confound that image - they are very quick and economical searchers. Their behaviour relates to their general information seeking behaviour, and their searching styles would be seen in this regard
  17. Millsap, L.; Ferl, T.E.: ¬The knuckle-cracker's dilemma : a transaction log study of OPAC subject searching (1996) 0.01 
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  18. Larson, R.R.: ¬The decline of subject searching : long-term trends and patterns of index use in an online catalog (1991) 0.01 
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    Abstract
    Search index usage in a large university online catalog system over a six-year period (representing about 15,3 million searches) was investigated using transaction monitor data. Mathematical models of trends and patterns in the data were developed and tested using regression techniques. The results of the analyses show a consistent decline in the frequency of subject index use by online catalog users, with a corresponding increase in the frequency of title keyword searching. Significant annual patterns in index usage were also identified. Analysis of the transaction data, and related previous studies of online catalog users, suggest a number of factors contributing to the decline in subject search frequency. Chief among these factors are user difficulties in formulating subject queries with LCSH, leading to search failure, and the problem of "information overload" as database size increases. This article presents the models and results of the transaction log analysis, discusses the underlying problems with subject searching contributing to the observed decline, and reviews some proposed improvements to online catalog systems to aid in overcoming these problems
  19. Pasanen-Tuomainen, I.: Analysis of subject searching in the TENTTU books database (1992) 0.01 
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    Abstract
    Presents a pilot study for an Internordic project to monitor the use of online catalogues in the Nordic technological university libraries. Focuses on the use of classification in subject searching, how the UDC is used and the extent of its use. Studies user interaction with the OPACs and improvements to information retrieval in the catalogues using the transaction log method to gather data. The pilot study examnines the TENTTU Books database which is the online union catalogue of the Helsinki Univ. of Technology Library, a multilingual database with true information retrieval. The Internordic study itself will make comparisons between the TENTTU system and the new Virginia Tech Library System. Discusses the users monitored, method of analysis, subject searching in the database, results and how the UDC codes were used. Compares this to other studies conducted in Finland and evaluates the project
  20. Pasanen-Tuomainen, I.: Does access meet availability at an OPAC? (1993) 0.01 
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    Abstract
    Paper presented at the 1992 IATUL seminar in Tallinn, estonia: 'Universal Availability of Publications in Science and Technology including those on the history and philosophy of grey literature' on UAP policy and practice. Discusses surveys conducted at the Helsinki Univ. of Technology Library analysing the use of the online catalogue. Covers the Internordic Study 'Monitoring the Online Catalogues of the Nordic Technical University Libraries', whose aim was the promotion of end-user accessibility to information as part of a training program. Users' search behaviour was observed during the course on the library's TENTTU information retrieval system. Analyses the transaction log files of end users. Presents statistics on the distribution of search elements in free text and field codes and the use of Boolean operators. Comments on a software package enabling analysis of the interaction between the system and the end user. This may be useful to evaluate training programs

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