Search (113 results, page 1 of 6)

  • × theme_ss:"Benutzerstudien"
  • × theme_ss:"OPAC"
  1. Sapa, R.: Zachowania informacy jne uzytkownika OPAC w Bibliotece Jagiellonskiej (1997) 0.01 
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    Abstract
    Discusses the necessity of providing new methods of research into user information retrieval behaviour. Notes that the user using the catalogue via the Internet and communicating exclusively with the computer system, disappears from the librarian's direct view. Implementing adequate software facilities in some sense broadens research prospects and improves its quality. Describes research carried out at the Jagiellonian Library, Poland, into the extent of use of OPAC retrieval facilities, throught the application of software that records all information retrieval commands
    Footnote
    Übers. d. Titels: OPAC user's information behaviours in Jagiellonian Library
  2. Solomon, P.: On the dynamics of information system use : from novice to? (1992) 0.01 
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    Abstract
    Explores the variety of user behaviour exhibited by users of information retrieval systems over time and the effort of differences between expert and novice searchers on an understanding of information searching dynamics and on the design of information systems. Based on a naturalistic case study. Points out some of the dynamic patterns of behaviour of children's use of online catalogues (OPACs)
    Imprint
    Medford, NJ : Learned Information Inc.
    Source
    Proceedings of the 55th Annual Meeting of the American Society for Information Science, Pittsburgh, 26.-29.10.92. Ed.: D. Shaw
  3. Markey, K.: Twenty-five years of end-user searching : part 2: future research directions (2007) 0.01 
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    Abstract
    This is the second part of a two-part article that examines 25 years of published research findings on end-user searching of online information retrieval (IR) systems. In Part 1, it was learned that people enter a few short search statements into online IR systems. Their searches do not resemble the systematic approach of expert searchers who use the full range of IR-system functionality. Part 2 picks up the discussion of research findings about end-user searching in the context of current information retrieval models. These models demonstrate that information retrieval is a complex event, involving changes in cognition, feelings, and/or events during the information seeking process. The author challenges IR researchers to design new studies of end-user searching, collecting data not only on system-feature use, but on multiple search sessions and controlling for variables such as domain knowledge expertise and expert system knowledge. Because future IR systems designers are likely to improve the functionality of online IR systems in response to answers to the new research questions posed here, the author concludes with advice to these designers about retaining the simplicity of online IR system interfaces.
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.8, S.1123-1130
  4. Hert, C.A.: User goals on an online public access catalog (1996) 0.01 
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    Abstract
    An ongoing thread in information retrieval research has been the exploration of user goals (or information needs, or problems) on information retrieval systems. It has been suggested that an understanding of goals and their role in the information retrieval interaction can provide insight into appropriate retrieval strategies, relevant documents, and general system design. This article reports on empirical findings concerning goals of users searching an OPAC at a northeastern United States university. These findings were generated during a large inductive and qualitative study of users' interactions with the OPAC. It was found that respondents came to the OPAC to search for a variety of course- or degree-related projects in which they were engaged. Respondent goals were not greatly modified during the course of these interactions. A set of situational elements associated with the respondent's goal was also identified. The implications of these findings for OPAC design and the training of informational professionals are discussed
    Source
    Journal of the American Society for Information Science. 47(1996) no.7, S.504-518
  5. 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
    Theme
    Klassifikationssysteme im Online-Retrieval
  6. Larson, R.R.: Evaluation of advanced retrieval techniques in an experimental online catalog (1992) 0.01 
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    Abstract
    Research on the use and users of online catalogs conducted in the early 1980s found that subject searches were the most common form of online catalog search. At the same time, many of the problems experienced by online catalog users have been traced to difficulties with the subject access mechanisms of the online catalog. Numerous proposals have been made for methods intended to improve subject access to online catalog records. These commonly involve enhancing the catalog's bibliographic records with additional terms, or incorporating subject authority files or additional thesauri in the database. Another stream of research has concentrated on applying retrieval techniques derived from information retrieval (IR) research to replace the Boolean search methods of conventional online catalog systems. This study describes the results of retrieval tests using a variety of these search methods in the CHESHIRE experimental online catalog system.
    Source
    Journal of the American Society for Information Science. 43(1992), S.34-53
  7. Borgman, C.L.: Why are online catalogs hard to use? : lessons learned from information-retrieval studies (1986) 0.01 
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    Abstract
    Research in user behavior on online catalogs is in its early stages, but preliminary findings suggest that users encounter many of the same problems identified in behavioral studies of other types of bibliographic retrieval systems. Much can be learned from comparing the results of user behavior studies on these two types of systems. Research on user problems with both the mechanical aspects and the conceptual aspects of system use is reviewed, with the conclusion that more similiratiy exists across types of systems in conceptual than in mechanical problems. Also discussed are potential sources of the problems, due either to individual characteristics or to system variables. A series of research questions is proposed and a number of potential interim solutions ae suggested for alleviating some of the problems encountered by users of information systems
    Source
    Journal of the American Society for Information Science. 37(1986), S.387-400
  8. Borgman, C.L.; Hirsh, S.G.; Hiller, J.: Rethinking online monitoring methods for information retrieval systems : from search product to search process (1996) 0.01 
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    Abstract
    Searching information retrieval systems is a highly interactive, iterative process that cannot be understood simply by comparing the output of a search session (the 'search product') to a query stated in advance. In this article, we examine evaluation goals and methods for studying information retrieval behavior, drawing examples from our own research and that of others. We limit our review to research that employs online monitoring, also known as transaction log analysis. Online monitoring is one of few methods that can capture detailed data on the search process at a reasonable cost; these data can be used to build quantitative models or to support qualitative interpretations of quatitative results. Monitoring is a data collection technique rather than a research design, and can be employed in experimental of field studies, whether alone or combined with other data collection methods. Based on the the research questions of interest, the researcher must determine what variables to collect from each data source, which to treat as independent varaibles to manipulate, and which to treat as dependent variables to observe effects. Studies of searching behavior often treat search task and searcher characteristics as independent variables and may manipulate other independent variables specific to the research questions addressed. Search outcomes, time, and search paths frequently are treated as dependent variables. We discuss each of these sets of variables, illustrating them with sample results from the literature and from our own research. Our examples are drawn from the Science Library Catalog project, a 7-year study of children's searching behavior on an experimental retrieval system. We close with a brief discussion of the implications of these results for the design of information retrieval systems
    Source
    Journal of the American Society for Information Science. 47(1996) no.7, S.568-583
  9. Slack, F.: End user searches and search path maps : a discussion (1996) 0.01 
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    Abstract
    Examines the development of OPACs of the last 15 years and how this has promoted the use of automated information retrieval systems. Investigates how end users use the system available to them and the type of subject searches which they carry out. Compares 2 techniques for mapping searches. Concludes that there is a need for effective diagnosis and monitoring methods and an efficient method of analysis of end user use is essential
  10. Slack, F.: End-user searches and search path maps : a discussion (1996) 0.01 
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    Abstract
    Examines the development of OPACs of the last 15 years, and how this has promoted the use of automated information retrieval systems. Using the technique of search path maps, investigates how end users use the system available to them and the type of subject searches they carry out. Compares 2 techniques for mapping searches, concluding that there is need for effective diagnosis and monitoring methods, and that an efficient method of analysis of end user use is essential
  11. 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
  12. Kaske, N.K.: ¬A comparative study of subject searching in an OPAC among branch libraries of a university library system (1988) 0.01 
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    Abstract
    The degree of variability in the percentage of subject searching in an online public access catalog (OPAC) among branch libraries of one university was studied. A full semester's worth of transactions was analyzed, not sampled. The time units used were hour of the day, day of the week, and week of the semester. The findings show that subject searching varies from a low of 22% to a high of 74% over the hours of a day. Variability for the days of the week ranged from 17% to 64%, and for the weeks of the semester variability ranged from 12% to 70%. Valuable management information on the utilization of the OPAC within each brach library and among all the branch libraries is provided through numerous charts and graphs.
    Source
    Information technology and libraries. 7(1988), S.359-372
  13. Willson, R.; Given, L.M.: ¬The effect of spelling and retrieval system familiarity on search behavior in online public access catalogs : a mixed methods study (2010) 0.01 
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    Abstract
    Although technology can often correct spelling errors, the complex tasks of information searching and retrieval in an online public access catalog (OPAC) are made more difficult by these errors in users' input and bibliographic records. This study examines the search behaviors of 38 university students, divided into groups with either easy-to-spell or difficult-to-spell search terms, who were asked to find items in the OPAC with these search terms. Search behaviors and strategy use in the OPAC and on the World Wide Web (WWW) were examined. In general, students used familiar Web resources to check their spelling or discover more about the assigned topic. Students with difficult-to-spell search terms checked spelling more often, changed search strategies to look for the general topic and had fewer successful searches. Students unable to find the correct spelling of a search term were unable to complete their search. Students tended to search the OPAC as they would search a search engine, with few search terms or complex search strategies. The results of this study have implications for spell checking, user-focused OPAC design, and cataloging. Students' search behaviors are discussed by expanding Thatcher's (2006) Information-Seeking Process and Tactics for the WWW model to include OPACs.
    Source
    Journal of the American Society for Information Science and Technology. 61(2010) no.12, S.2461-2476
  14. Solomon, P.: Children's information retrieval behavior : a case analysis of an OPAC (1993) 0.01 
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    Abstract
    This article reports research that explored children's information retrieval behavior using an OPAC in an elementary school library. The study considers the impact of a variety of factors including user characteristics, the school setting, interface usability, and information access features on children's information retrieval success and breakdown. The study reports the overall patterns of children's behavior that influence success and breakdown in information retrieval as well as findings about the intentions, moves, plans, strategies, and search terms of children in grades one through six
    Source
    Journal of the American Society for Information Science. 44(1993) no.5, S.245-264
  15. Hancock, M.: Subject searching behaviour at the library catalogue and at the shelves : implications for online interactive catalogues (1987) 0.01 
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    Abstract
    Searching behaviour in a university library is studied using a holistic approach, encompassing the use of bibliographic tools and shelf browsing. The present study is designed as the first half of a 'before and after' study to permit the evaluation of the impact of a future online catalogue on users' searching behaviour. A combined methodology was devised: searchers were encouraged to talk aloud during their search, and this information, together with some probing and real time expert interpretation, enabled the experimente to record the searching activity on a highly structured observation form. The study reveals the extent of subject searching activity, and suggests that this may have been underestimated in previous studies. The analysis of expressed topics, search formulation strategy and documents retrieved reveals the adaptive nature of the subject searching process, whereby the user adapts to the structure of the available tools. The information retrieval task in a traditional library system is tailored by the system to a single, one dimensional, sequential process. It is suggested that a major obstacle to subject searching effectiveness may lie in the lack of interaction between the different possible approaches in the searching process: the indexing language, the classification, and the titles. It is to be hoped that a future online searching environment will encourage a more truly interactive approach to subject searching.
  16. Wiberley, S.E.; Daugerthy, R.A.; Danowski, J.A.: User persistence in scanning postings of a computer-driven information system : LCS (1990) 0.01 
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    Source
    Library and information science research. 12(1990) no.4, S.341-353
  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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    Abstract
    Reports results of an online survey of in house users acessing California University's computerized union catalogue, the MELVYL library system, from public access terminals in the libraries of the California University at Santa Cruz (UCSC). The study included descriptive statistics on user status, affiliation, anticipated focus of system usage, judgement of ease of system use, and need for assistance. The transaction logs of respondents to the survey were analyzed and cross tabulated with demographic data on the same group of users. Particular attention was given to subject searching and to the dilemmas that confront users of a system in which heuristics are largely absent. Data was compared with similar data collected in a earlier study of user who accessed the MELVYL library system from remote sites
    Source
    Information technology and libraries. 15(1996) no.2, S.81-98
  18. Millsap, L.; Ferl, T.E.: Search patterns of remote users : an analysis of OPAC transaction logs (1993) 0.01 
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    Abstract
    The focus of this study is the search behavior of remote users of the University of California MELVYL Library System, an OPAC. Transaction logs from randomly selected remote user search sessions are analyzed. Descriptive data on the number and type of searches, choice of search mode and database, number of retrievals, number and type of errors, and use of system HELP facilities are presented. The search data have been cross-tabulated with demographic data on the same group of remote users, collected through an online survey conducted by the authors. Effectiveness of system usage is discussed. A case mode is made for the desirability of additional heuristics in the catalog portion of the system
    Source
    Information technology and libraries. 12(1993) no.3, S.321-343
  19. Park, I.: ¬A comparative study of major OPACs in selected academic libraries for developing countries : user study and subjective user evaluation (1997) 0.01 
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    Abstract
    Provides information on the characteristics of 5 online catalogue systems in 5 academic libraries in the austin, Texas and North Texas, USA, and their use by Korean students at University of North Texas, USA, in order to assist system managers in the selection of online catalogues. Proposes recommendations when designing, adopting, or managing a new online catalogue system. Topics for further studies on the characteristics of online systems and their use are also suggested
    Source
    International information and library review. 29(1997) no.1, S.67-83
  20. Chen, H.-M.; Cooper, M.D.: Using clustering techniques to detect usage patterns in a Web-based information system (2001) 0.01 
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    Abstract
    Different users of a Web-based information system will have different goals and different ways of performing their work. This article explores the possibility that we can automatically detect usage patterns without demographic information about the individuals. First, a set of 47 variables was defined that can be used to characterize a user session. The values of these variables were computed for approximately 257,000 sessions. Second, principal component analysis was employed to reduce the dimensions of the original data set. Third, a twostage, hybrid clustering method was proposed to categorize sessions into groups. Finally, an external criteriabased test of cluster validity was performed to verify the validity of the resulting usage groups (clusters). The proposed methodology was demonstrated and tested for validity using two independent samples of user sessions drawn from the transaction logs of the University of California's MELVYL® on-line library catalog system (www.melvyl.ucop.edu). The results indicate that there were six distinct categories of use in the MELVYL system: knowledgeable and sophisticated use, unsophisticated use, highly interactive use with good search performance, known-item searching, help-intensive searching, and relatively unsuccessful use. Their characteristics were interpreted and compared qualitatively. The analysis shows that each group had distinct patterns of use of the system, which justifies the methodology employed in this study
    Source
    Journal of the American Society for Information Science and technology. 52(2001) no.11, S.888-904

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