Search (21 results, page 1 of 2)

  • × theme_ss:"Benutzerstudien"
  • × theme_ss:"OPAC"
  • × year_i:[2000 TO 2010}
  1. Slone, D.J.: ¬The influence of mental models and goals on search patterns during Web interaction (2002) 0.02 
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    Abstract
    Thirty-one patrons, who were selected by Slone to provide a range of age and experience, agreed when approached while using the catalog of the Wake County library system to try searching via the Internet. Fifteen searched the Wake County online catalog in this manner and 16 searched the World Wide Web, including that catalog. They were subjected to brief pre-structured taped interviews before and after their searches and observed during the searching process resulting in a log of behaviors, comments, pages accessed, and time spent. Data were analyzed across participants and categories. Web searches were characterized as linking, URL, search engine, within a site domain, and searching a web catalog; and participants by the number of these techniques used. Four used only one, 13 used two, 11 used three, two used four, and one all five. Participant experience was characterized as never used, used search engines, browsing experience, email experience, URL experience, catalog experience, and finally chat room/newsgroup experience. Sixteen percent of the participants had never used the Internet, 71% had used search engines, 65% had browsed, 58% had used email, 39% had used URLs, 39% had used online catalogs, and 32% had used chat rooms. The catalog was normally consulted before the web, where both were used, and experience with an online catalog assists in web use. Scrolling was found to be unpopular and practiced halfheartedly.
    Source
    Journal of the American Society for Information Science and technology. 53(2002) no.13, S.1152-1169
  2. Matsui, S.; Konno, H.: Evaluation of World Wide Web access to OPACs of public libraries in Japan : functional survey of 46 OPAC systems and end user survey of three of those systems (2000) 0.01 
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  3. Weichert, M.: "Gibt es auch Wahnsinn" : Benutzeruntersuchungen an einem Hamburger WebOPAC (2002) 0.01 
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    Abstract
    Der Beitrag fasst die Ergebnisse einer Untersuchung von über 50 000 Suchanfragen am Hamburger Campus-Katalog zusammen. Der Campus-Katalog ist ein WEB-Katalog auf der Basis des Pica-Lokalsystems LBS3, dessen Protokolldateien die Rohdaten lieferten. Über die statistische Analyse der Suchanfragen hinaus, wird ein Versuch unternommen, die einzelnen Schritte einer Katalogrecherche zusammenzufassen und die Reaktion der Benutzer auf erfolglose Suchanfragen zu untersuchen.
    Source
    Bibliothek: Forschung und Praxis. 26(2002) H.2, S.142-149
  4. Schneider, R.: OPACs, Benutzer und das Web (2009) 0.01 
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    Abstract
    Der Artikel betrachtet anhand einer Studie zum Benutzerverhalten bei der Online-Katalogrecherche den gegenwärtigen Stellenwert und das zukünftige Potential der Web-OPACs. Dabei werden zunächst die Ergebnisse einer quantitativen Logfile-Analyse sowie qualitativer Benutzertests erörtert, bevor aktuelle Entwicklungen der Webtechnologie, die unter den Schlagworten Web 2.0 und Web 3.0 propagiert werden, im Zusammenhang mit der Online-Recherche und der Entwicklung neuartiger Suchverfahren kurz diskutiert werden.
    Date
    22. 2.2009 18:50:43
  5. Slone, D.J.: ¬A bird's eye view of cross-platform web interaction (2005) 0.01 
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    Abstract
    Purpose - This exploratory study sets out to describe the ways in which end-users exchanged information between the web and a web online catalog, how they searched one device based on what they knew about the other, and their experiences in navigating between the two devices. Design/methodology/approach - Thirty-one participants were observed searching the web or a web online catalog. After the observations, an interview guide was used to ask targeted questions. Findings - The findings suggest that people familiar with the use of traditional online catalogs were more comfortable using web tools than those who lacked online catalog experience. People who had recent web experience expected online catalog searching to be similar to web searching. However, drawing too close an association between the two systems sometimes caused difficulties when the searching protocols varied, like keyword searching versus selecting an index. Research limitations/implications - Some limitations of the study include a small sampling size, varied responses to interview questions, obtrusive procedures, and lack of generalizability to groups or settings dissimilar from the one in this study. Originality/value - This study provides a rare look into the challenges faced by a diverse group of public library users on the web. It is instructive for practicing librarians and researchers.
  6. Jansen, B.J.; Pooch , U.: ¬A review of Web searching studies and a framework for future research (2001) 0.01 
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    Abstract
    Jansen and Pooch review three major search engine studies and compare them to three traditional search system studies and three OPAC search studies, to determine if user search characteristics differ. The web search engine studies indicate that most searchers use two, two search term queries per session, no boolean operators, and look only at the top ten items returned, while reporting the location of relevant information. In traditional search systems we find seven to 16 queries of six to nine terms, while about ten documents per session were viewed. The OPAC studies indicated two to five queries per session of two or less terms, with Boolean search about 1% and less than 50 documents viewed.
    Source
    Journal of the American Society for Information Science and technology. 52(2001) no.3, S.235-246
  7. Markey, K.: Twenty-five years of end-user searching : part 1: research findings (2007) 0.01 
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    Abstract
    This is the first part of a two-part article that reviews 25 years of published research findings on end-user searching in online information retrieval (IR) systems. In Part 1 (Markey, 2007), the author seeks to answer the following questions: What characterizes the queries that end users submit to online IR systems? What search features do people use? What features would enable them to improve on the retrievals they have in hand? What features are hardly ever used? What do end users do in response to the system's retrievals? Are end users satisfied with their online searches? Summarizing searches of online IR systems by the search features people use everyday makes information retrieval appear to be a very simplistic one-stop event. In Part 2, the author examines current models of the information retrieval process, demonstrating that information retrieval is much more complex and involves changes in cognition, feelings, and/or events during the information seeking process. She poses a host of new research questions that will further our understanding about end-user searching of online IR systems.
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.8, S.1071-1081
  8. Cooper, M.D.: Usage patterns of a Web-based library catalog (2001) 0.01 
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    Abstract
    This article reports on a model and patterns of use of a library catalog that can be accessed through the Internet. Three categories of users are identified. individuals who perform a search of the catalog, tourists who look only at opening pages of the library catalog's site, and Web spiders that come to the site to obtain pages for indexing the Web. A number of types of use activities are also identified, and can be grouped with the presearch phase (which takes place before any searching begins): the search phase, the display phase (in which users display the results of their search), and phases in which users make errors, ask the system for help or assistance, and take other actions. An empirical investigation of patterns of use of a university Web-based library catalog was conducted for 479 days. During that period, the characteristics of about 2.5 million sessions were recorded and analyzed, and usage trends were identified. Of the total, 62% of the sessions were for users who performed a search, 27% were from spiders, and 11% were for tourists. During the study period, the average search session lasted about 5 minutes when the study began and had increased to about 10 minutes 16 months later. An average search consisted of about 1.5 presearch actions lasting about 25 seconds, about 5.3 display actions, and 2.5 searches per session. The latter two categories are in the range of 35-37 seconds per session each. There were major differences in usage (number of searches, search time, number of display actions, and display time), depending upon the database accessed
    Source
    Journal of the American Society for Information Science and technology. 52(2001) no.2, S.137-148
  9. 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
  10. Chen, H.-M.; Cooper, M.D.: Using clustering techniques to detect usage patterns in a Web-based information system (2001) 0.00 
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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
  11. Chen, H.-M.; Cooper, M.D.: Stochastic modeling of usage patterns in a Web-based information system (2002) 0.00 
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    Abstract
    Users move from one state (or task) to another in an information system's labyrinth as they try to accomplish their work, and the amount of time they spend in each state varies. This article uses continuous-time stochastic models, mainly based on semi-Markov chains, to derive user state transition patterns (both in rates and in probabilities) in a Web-based information system. The methodology was demonstrated with 126,925 search sessions drawn from the transaction logs of the University of California's MELVYL® library catalog system (www.melvyLucop.edu). First, user sessions were categorized into six groups based on their similar use of the system. Second, by using a three-layer hierarchical taxonomy of the system Web pages, user sessions in each usage group were transformed into a sequence of states. All the usage groups but one have third-order sequential dependency in state transitions. The sole exception has fourth-order sequential dependency. The transition rates as well as transition probabilities of the semi-Markov model provide a background for interpreting user behavior probabilistically, at various levels of detail. Finally, the differences in derived usage patterns between usage groups were tested statistically. The test results showed that different groups have distinct patterns of system use. Knowledge of the extent of sequential dependency is beneficial because it allows one to predict a user's next move in a search space based on the past moves that have been made. It can also be used to help customize the design of the user interface to the system to facilitate interaction. The group CL6 labeled "knowledgeable and sophisticated usage" and the group CL7 labeled "unsophisticated usage" both had third-order sequential dependency and had the same most-frequently occurring search pattern: screen display, record display, screen display, and record display. The group CL8 called "highly interactive use with good search results" had fourth-order sequential dependency, and its most frequently occurring pattern was the same as CL6 and CL7 with one more screen display action added. The group CL13, called "known-item searching" had third-order sequential dependency, and its most frequently occurring pattern was index access, search with retrievals, screen display, and record display. Group CL14 called "help intensive searching," and CL18 called "relatively unsuccessful" both had thirdorder sequential dependency, and for both groups the most frequently occurring pattern was index access, search without retrievals, index access, and again, search without retrievals.
    Source
    Journal of the American Society for Information Science and technology. 53(2002) no.7, S.536-548
  12. Thissen, F.: Verloren in digitalen Netzen : Nutzertests zur Optimierung der Bedienerfreundlichkei eines Online-Katalogs (2002) 0.00 
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    Abstract
    Im Rahmen einer Überarbeitung und Erweiterung des Internet-Auftritts der Stadtbibliothek Stuttgart wurde die Bedienerfreundlichkeit (usability) des Online-Katalogs (OPAC) der Bücherei wissenschaftlich getestet, um daraus Kriterien für eine mögliche Verbesserung herauszuarbeiten. Anfragen von Nutzern der Bibliothek und Beobachtungen der Bibliotheksmitarbeiterinnen hatten in der Vergangenheit deutlich gemacht, dass es offensichtlich nicht allen Nutzern problemlos möglich ist, den Katalog effektiv und angemessen zu nutzen. Da es sich beim webbasierten Online-Katalog um das Kernstück der Website der Bibliothek handelt, hatte seine Optimierung größte Priorität. Das Ziel sollte sein, einen Katalog anzubieten, der von sämtlichen potentiellen Nutzern mit den unterschiedlichsten Vorkenntnissen mit möglichst geringem Aufwand und einem optimalen Suchergebnis bedient werden kann.
  13. Smrzka, B.: ¬Der Web-OPAC der Büchereien Wien : Usability Untersuchung (2003) 0.00 
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  14. Miller, D.H.: User perception and the online catalogue : public library OPAC users "think aloud" (2004) 0.00 
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    Content
    1. Introduction Significant research in the design and use of online public access catalogues (OPACs) has been conducted by professionals in library and information science (Borgman, 1996; Carlyle, 2001, Carlyle & Timmons, 2002; Hancock, 1987). However, only limited research has addressed actual library user interaction with and perceptions of online catalogue displays and bibliographic elements (Abrera, 1986; Luk, 1996; Markey, 1983). Retrieval systems, specifically online library catalogues, should consider user perceptions and expectations as an important aspect of design and implementation for improved catalogue efficiency (Hert, 1996). Therefore, it is necessary to examine the online catalogue from a user perspective to determine if it is currently succeeding in meeting the bibliographic needs of users in terms of description, display, navigation, and to provide principles for design of future OPACs. A study seeking to understand better how public library users interact with general OPAC displays and the more specific displays of bibliographic information was conducted in 2003. Research questions focused an 1) user perceptions of the OPAC, 2) the elements in a bibliographic display standing out as most important in selection and identification, and 3) user feedback an the process of using the OPAC. The purpose of this paper is to highlight the larger study findings having implications for future research and online catalogue design.
    Source
    Knowledge organization and the global information society: Proceedings of the 8th International ISKO Conference 13-16 July 2004, London, UK. Ed.: I.C. McIlwaine
  15. De Rosa, C.; Cantrell, J.; Cellentani, D.; Hawk, J.; Jenkins, L.; Wilson, A.: Perceptions of libraries and information resources : A Report to the OCLC Membership (2005) 0.00 
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    Abstract
    Summarizes findings of an international study on information-seeking habits and preferences: With extensive input from hundreds of librarians and OCLC staff, the OCLC Market Research team developed a project and commissioned Harris Interactive Inc. to survey a representative sample of information consumers. In June of 2005, we collected over 3,300 responses from information consumers in Australia, Canada, India, Singapore, the United Kingdom and the United States. The Perceptions report provides the findings and responses from the online survey in an effort to learn more about: * Library use * Awareness and use of library electronic resources * Free vs. for-fee information * The "Library" brand The findings indicate that information consumers view libraries as places to borrow print books, but they are unaware of the rich electronic content they can access through libraries. Even though information consumers make limited use of these resources, they continue to trust libraries as reliable sources of information.
  16. Hildreth, C.R.: Accounting for users' inflated assessments of on-line catalogue search performance and usefulness : an experimental study (2001) 0.00 
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    Source
    Information Research. 6(2001), no.2
  17. Moulaison, H.L.: OPAC queries at a medium-sized academic library : a transaction log analysis (2008) 0.00 
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    Date
    10. 9.2000 17:38:22
  18. Slone, D.J.: Encounters with the OPAC : On-line searching in public libraries (2000) 0.00 
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    Abstract
    This article reports on a qualitative study exploring: (1) strategies and behaviors of public library users during interaction with an OPAC; and (2) users' confidence in finding needed information on-line. Questionnaires, interviews, and observations were employed to gather data from 32 public library users. the results found search behaviors, confidence, and other feelings varied, based on 3 types of searches: unknown-item searches; area searches; and known-item searches. Term generation was the most important factor in unknown-item search strategies. Speed and convenience palyed a role in area searches, and simplicity characterized known-item searches. Of the 3 types, unknown-item searchers experienced the most frustration and doubt; known-item searchers the most disappointment; and area searchers the most confidence and contentment. Knowledge of these differences may prove helpful for librarians and interface designers
    Source
    Journal of the American Society for Information Science. 51(2000) no.8, S.757-773
  19. Kilgour, F.G.: Known-item online searches employed by scholars using surnames plus first, or last, or first and last title words (2001) 0.00 
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    Source
    Journal of the American Society for Information Science and technology. 52(2001) no.14, S.1203-1209
  20. Novotny, E,: I don't think I click : a protocol analysis study of use of a library online catalog in the Internet age (2004) 0.00 
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    Abstract
    There's something magical about interface design. The research done to determine user behavior that leads to design decisions is positively fascinating. This time round we have a group at Penn State testing the proficiency of users on their brand new OPAC. The users were divided into two groups, "experienced" and "first-time". Results confirm other studies in this area, namely, that when confronting an OPAC, users both experienced and not, assume they're in front of something similar to Google. They go for keywords by default, expect results ranked by relevancy (as opposed to chronology), make no use of Boolean Operators, have no idea of what information is actually indexed, and lack the curiosity or time to "learn the system". "We can either abandon this population," the author stresses, "or design systems that do not require expert knowledge to be used effectively.

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