Search (262 results, page 1 of 14)

  • × theme_ss:"Benutzerstudien"
  1. Robins, D.: Shifts of focus on various aspects of user information problems during interactive information retrieval (2000) 0.03 
    0.025964873 = product of:
  0.06923966 = sum of:
    0.027509877 = weight(_text_:retrieval in 4995) [ClassicSimilarity], result of:
      0.027509877 = score(doc=4995,freq=4.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.2835858 = fieldWeight in 4995, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=4995)
    0.010544236 = product of:
      0.021088472 = sum of:
        0.021088472 = weight(_text_:system in 4995) [ClassicSimilarity], result of:
          0.021088472 = score(doc=4995,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.20878783 = fieldWeight in 4995, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.046875 = fieldNorm(doc=4995)
      0.5 = coord(1/2)
    0.031185552 = product of:
      0.062371105 = sum of:
        0.062371105 = weight(_text_:etc in 4995) [ClassicSimilarity], result of:
          0.062371105 = score(doc=4995,freq=2.0), product of:
            0.17370372 = queryWeight, product of:
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.032069415 = queryNorm
            0.35906604 = fieldWeight in 4995, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.046875 = fieldNorm(doc=4995)
      0.5 = coord(1/2)
  0.375 = coord(3/8)
    Abstract
    The author presents the results of additional analyses of shifts of focus in IR interaction. Results indicate that users and search intermediaries work toward search goals in nonlinear fashion. Twenty interactions between 20 different users and one of four different search intermediaries were examined. Analysis of discourse between the two parties during interactive information retrieval (IR) shows changes in topic occurs, on average, every seven utterances. These twenty interactions included some 9,858 utterances and 1,439 foci. Utterances are defined as any uninterrupted sound, statement, gesture, etc., made by a participant in the discourse dyad. These utterances are segmented by the researcher according to their intentional focus, i.e., the topic on which the conversation between the user and search intermediary focus until the focus changes (i.e., shifts of focus). In all but two of the 20 interactions, the search intermediary initiated a majority of shifts of focus. Six focus categories were observed. These were foci dealing with: documents; evaluation of search results; search strategies; IR system; topic of the search; and information about the user
  2. Meadow, C.T.: Speculations on the measurement and use of user characteristics in information retrieval experimentation (1994) 0.02 
    0.02426225 = product of:
  0.06469933 = sum of:
    0.032094855 = weight(_text_:retrieval in 1795) [ClassicSimilarity], result of:
      0.032094855 = score(doc=1795,freq=4.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.33085006 = fieldWeight in 1795, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1795)
    0.017397102 = product of:
      0.034794204 = sum of:
        0.034794204 = weight(_text_:system in 1795) [ClassicSimilarity], result of:
          0.034794204 = score(doc=1795,freq=4.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.34448233 = fieldWeight in 1795, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1795)
      0.5 = coord(1/2)
    0.01520737 = product of:
      0.03041474 = sum of:
        0.03041474 = weight(_text_:22 in 1795) [ClassicSimilarity], result of:
          0.03041474 = score(doc=1795,freq=2.0), product of:
            0.112301625 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.032069415 = queryNorm
            0.2708308 = fieldWeight in 1795, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1795)
      0.5 = coord(1/2)
  0.375 = coord(3/8)
    Abstract
    Presents a recently composite view of several user studies in information retrieval. Contains personal conclusions and speculations based on these studies, rather than formal statistical results, which so often are not comparable from 1 experiment to another. Suggests a taxonomy of user characteristics for such studies, in order to make results comparable. Discusses methods and effects of user training, then manner of expression of a query or information need, conduct of a search, use of the system command language or its equivalent, analysis by the user of retrieved information, and user satisfaction with outcome. Concludes with suggestions for system design and experimental methodology
    Source
    Canadian journal of information and library science. 19(1994) no.4, S.1-22
  3. MacFarlane, A.; Al-Wabil, A.; Marshall, C.R.; Albrair, A.; Jones, S.A.; Zaphiris, P.: ¬The effect of dyslexia on information retrieval : a pilot study (2010) 0.02 
    0.021637395 = product of:
  0.05769972 = sum of:
    0.022924898 = weight(_text_:retrieval in 3624) [ClassicSimilarity], result of:
      0.022924898 = score(doc=3624,freq=4.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.23632148 = fieldWeight in 3624, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=3624)
    0.008786863 = product of:
      0.017573725 = sum of:
        0.017573725 = weight(_text_:system in 3624) [ClassicSimilarity], result of:
          0.017573725 = score(doc=3624,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.17398985 = fieldWeight in 3624, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3624)
      0.5 = coord(1/2)
    0.02598796 = product of:
      0.05197592 = sum of:
        0.05197592 = weight(_text_:etc in 3624) [ClassicSimilarity], result of:
          0.05197592 = score(doc=3624,freq=2.0), product of:
            0.17370372 = queryWeight, product of:
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.032069415 = queryNorm
            0.2992217 = fieldWeight in 3624, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3624)
      0.5 = coord(1/2)
  0.375 = coord(3/8)
    Abstract
    Purpose - The purpose of this paper is to resolve a gap in the knowledge of how people with dyslexia interact with information retrieval (IR) systems, specifically an understanding of their information-searching behaviour. Design/methodology/approach - The dyslexia cognitive profile is used to design a logging system, recording the difference between two sets of participants: dyslexic and control users. A standard Okapi interface is used - together with two standard TREC topics - in order to record the information searching behaviour of these users. Findings - Using the log data, the differences in information-searching behaviour of control and dyslexic users, i.e. in the way the two groups interact with Okapi, are established and it also established that qualitative information collected (such as experience etc.) may not be able to account for these differences. Evidence from query variables was unable to distinguish between groups, but differences on topic for the same variables were recorded. Users who view more documents tended to judge more documents as being relevant, in terms of either the user group or topic. Session data indicated that there may be an important difference between the number of iterations used in a search between the user groups, as there may be little effect from the topic on this variable. Originality/value - This is the first study of the effect of dyslexia on information search behaviour, and it provides some evidence to take the field forward.
  4. Zhang, X.; Chignell, M.: Assessment of the effects of user characteristics on mental models of information retrieval systems (2001) 0.02 
    0.02027187 = product of:
  0.08108748 = sum of:
    0.033692583 = weight(_text_:retrieval in 5753) [ClassicSimilarity], result of:
      0.033692583 = score(doc=5753,freq=6.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.34732026 = fieldWeight in 5753, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=5753)
    0.047394894 = sum of:
      0.021088472 = weight(_text_:system in 5753) [ClassicSimilarity], result of:
        0.021088472 = score(doc=5753,freq=2.0), product of:
          0.10100432 = queryWeight, product of:
            3.1495528 = idf(docFreq=5152, maxDocs=44218)
            0.032069415 = queryNorm
          0.20878783 = fieldWeight in 5753, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.1495528 = idf(docFreq=5152, maxDocs=44218)
            0.046875 = fieldNorm(doc=5753)
      0.02630642 = weight(_text_:29 in 5753) [ClassicSimilarity], result of:
        0.02630642 = score(doc=5753,freq=2.0), product of:
          0.11281017 = queryWeight, product of:
            3.5176873 = idf(docFreq=3565, maxDocs=44218)
            0.032069415 = queryNorm
          0.23319192 = fieldWeight in 5753, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5176873 = idf(docFreq=3565, maxDocs=44218)
            0.046875 = fieldNorm(doc=5753)
  0.25 = coord(2/8)
    Abstract
    This article reports the results of a study that investigated effects of four user characteristics on users' mental models of information retrieval systems: educational and professional status, first language, academic background, and computer experience. The repertory grid technique was used in the study. Using this method, important components of information retrieval systems were represented by nine concepts, based on four IR experts' judgments. Users' mental models were represented by factor scores that were derived from users' matrices of concept ratings on different attributes of the concepts. The study found that educational and professional status, academic background, and computer experience had significant effects in differentiating users on their factor scores. First language had a borderline effect, but the effect was not significant enough at a = 0.05 level. Specific different views regarding IR systems among different groups of users are described and discussed. Implications of the study for information science and IR system designs are suggested
    Date
    29. 9.2001 14:00:33
  5. Broadbent, D.E.; Broadbent, M.H.P.: ¬The allocation of descriptor terms by individuals in a simulated retrieval system (1978) 0.02 
    0.019997772 = product of:
  0.07999109 = sum of:
    0.051873125 = weight(_text_:retrieval in 8695) [ClassicSimilarity], result of:
      0.051873125 = score(doc=8695,freq=2.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.5347345 = fieldWeight in 8695, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.125 = fieldNorm(doc=8695)
    0.028117962 = product of:
      0.056235924 = sum of:
        0.056235924 = weight(_text_:system in 8695) [ClassicSimilarity], result of:
          0.056235924 = score(doc=8695,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.5567675 = fieldWeight in 8695, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.125 = fieldNorm(doc=8695)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
  6. Yitzhaki, M.; Hammershlag, G.: Accessibility and use of information sources among computer scientists and software engineers in Israel : academy versus industry (2004) 0.02 
    0.017219307 = product of:
  0.06887723 = sum of:
    0.010961009 = product of:
      0.021922018 = sum of:
        0.021922018 = weight(_text_:29 in 2388) [ClassicSimilarity], result of:
          0.021922018 = score(doc=2388,freq=2.0), product of:
            0.11281017 = queryWeight, product of:
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.032069415 = queryNorm
            0.19432661 = fieldWeight in 2388, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2388)
      0.5 = coord(1/2)
    0.05791622 = product of:
      0.11583244 = sum of:
        0.11583244 = weight(_text_:handbooks in 2388) [ClassicSimilarity], result of:
          0.11583244 = score(doc=2388,freq=2.0), product of:
            0.2593123 = queryWeight, product of:
              8.085969 = idf(docFreq=36, maxDocs=44218)
              0.032069415 = queryNorm
            0.4466909 = fieldWeight in 2388, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              8.085969 = idf(docFreq=36, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2388)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    Abstract
    Hypothesizing that workplace significantly affects information-seeking patterns, this study compared accessibility and use of information sources among 233 Israeli computer scientists and software engineers, employed in industry and academy, using a mail questionnaire, which yielded a usable reply rate of 33%. The two groups were found to differ significantly in age, education, seniority, and type of research they performed (basic vs. applied). Printed textbooks, professional journals, and oral discussions with colleagues or experts in the organization were common to both groups, topping almost all lists of accessibility and use. For most information sources, however, the two groups differed significantly and consistently. Printed professional journals as weIl as printed and electronic conference or meeting papers were consistently more accessible and more often used by the academy group, while the industry group reported greater access to and more frequent use of electronic textbooks and trade or promotional literature. In regard to handbooks and standards, in-house technical reports (printed), government technical reports (Internet), librarians and technical specialists (Internet), and oral discussions with supervisors, no significant differences in accessibility were found, but their use by the industry group was much higher. In both groups, accessibility was only partly related to use, and more so among the academy than the industry group.
    Date
    3. 7.2004 15:28:29
  7. Sapa, R.: Zachowania informacy jne uzytkownika OPAC w Bibliotece Jagiellonskiej (1997) 0.01 
    0.014745606 = product of:
  0.058982424 = sum of:
    0.044923443 = weight(_text_:retrieval in 3207) [ClassicSimilarity], result of:
      0.044923443 = score(doc=3207,freq=6.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.46309367 = fieldWeight in 3207, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0625 = fieldNorm(doc=3207)
    0.014058981 = product of:
      0.028117962 = sum of:
        0.028117962 = weight(_text_:system in 3207) [ClassicSimilarity], result of:
          0.028117962 = score(doc=3207,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.27838376 = fieldWeight in 3207, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0625 = fieldNorm(doc=3207)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    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
  8. Wilbur, W.J.: ¬A comparison of group and individual performance among subject experts and untrained workers at the document retrieval task (1998) 0.01 
    0.014422648 = product of:
  0.05769059 = sum of:
    0.04538898 = weight(_text_:retrieval in 3263) [ClassicSimilarity], result of:
      0.04538898 = score(doc=3263,freq=8.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.46789268 = fieldWeight in 3263, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0546875 = fieldNorm(doc=3263)
    0.012301609 = product of:
      0.024603218 = sum of:
        0.024603218 = weight(_text_:system in 3263) [ClassicSimilarity], result of:
          0.024603218 = score(doc=3263,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.2435858 = fieldWeight in 3263, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0546875 = fieldNorm(doc=3263)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    Abstract
    Reports on a study that contrdicts the hypothesis that building detailed subject knowledge into search system improves retrieval. A group with a background in molecular biology performed the same judgements when considering document retrieval as another group without subject knowledge. The untrained panel performed better than any of the members of the trained panel and almost at the level of the trained panel as a whole. Explains the method which uses the probability ranking principle to measure retrieval
  9. Wang, P.; Soergel, D.: Beyond topical relevance : document selection behaviour of real users of IR systems (1993) 0.01 
    0.014140559 = product of:
  0.056562237 = sum of:
    0.036679838 = weight(_text_:retrieval in 7960) [ClassicSimilarity], result of:
      0.036679838 = score(doc=7960,freq=4.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.37811437 = fieldWeight in 7960, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0625 = fieldNorm(doc=7960)
    0.019882401 = product of:
      0.039764803 = sum of:
        0.039764803 = weight(_text_:system in 7960) [ClassicSimilarity], result of:
          0.039764803 = score(doc=7960,freq=4.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.3936941 = fieldWeight in 7960, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0625 = fieldNorm(doc=7960)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    Abstract
    Reports on part of a study of real users' behaviour in selecting documents from a list of citations resulting from a search of an information retrieval system. Document selection involves value judgements and decision making. Understanding how users evaluate documents and make decisions provides a basis for designing intelligent information retrieval system that can do a better job of predicting usefulness
  10. Berger, F.C.; Hofstede, A.H.M. ter; Van der Weide, T.P.: Supporting query by navigation (1996) 0.01 
    0.013628845 = product of:
  0.05451538 = sum of:
    0.03930801 = weight(_text_:retrieval in 6966) [ClassicSimilarity], result of:
      0.03930801 = score(doc=6966,freq=6.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.40520695 = fieldWeight in 6966, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0546875 = fieldNorm(doc=6966)
    0.01520737 = product of:
      0.03041474 = sum of:
        0.03041474 = weight(_text_:22 in 6966) [ClassicSimilarity], result of:
          0.03041474 = score(doc=6966,freq=2.0), product of:
            0.112301625 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.032069415 = queryNorm
            0.2708308 = fieldWeight in 6966, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=6966)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    Abstract
    Describes the technique used to study hypertext systems from a very general point of view, focus on monitoring searchers' behaviour, predict the estimation of the ultimate goals of the searchers, and estimate the searchers' determination to find these goals. The components are combined via a Markov chain approach so as to study information retrieval in general and hypertext (hypermedia) in particular. Demonstrates how these estimations can be used to assist searchers during their searching process and presents the derivation of a relevance function for documents, based on these estimations
    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
  11. Sullenger, P.: ¬A serials transaction log analysis (1997) 0.01 
    0.01358568 = product of:
  0.05434272 = sum of:
    0.032420702 = weight(_text_:retrieval in 1627) [ClassicSimilarity], result of:
      0.032420702 = score(doc=1627,freq=2.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.33420905 = fieldWeight in 1627, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.078125 = fieldNorm(doc=1627)
    0.021922018 = product of:
      0.043844037 = sum of:
        0.043844037 = weight(_text_:29 in 1627) [ClassicSimilarity], result of:
          0.043844037 = score(doc=1627,freq=2.0), product of:
            0.11281017 = queryWeight, product of:
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.032069415 = queryNorm
            0.38865322 = fieldWeight in 1627, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.078125 = fieldNorm(doc=1627)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    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
  12. Shiri, A.A.; Revie, C.: Query expansion behavior within a thesaurus-enhanced search environment : a user-centered evaluation (2006) 0.01 
    0.013447358 = product of:
  0.035859622 = sum of:
    0.016210351 = weight(_text_:retrieval in 56) [ClassicSimilarity], result of:
      0.016210351 = score(doc=56,freq=2.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.16710453 = fieldWeight in 56, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=56)
    0.008786863 = product of:
      0.017573725 = sum of:
        0.017573725 = weight(_text_:system in 56) [ClassicSimilarity], result of:
          0.017573725 = score(doc=56,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.17398985 = fieldWeight in 56, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0390625 = fieldNorm(doc=56)
      0.5 = coord(1/2)
    0.010862407 = product of:
      0.021724815 = sum of:
        0.021724815 = weight(_text_:22 in 56) [ClassicSimilarity], result of:
          0.021724815 = score(doc=56,freq=2.0), product of:
            0.112301625 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.032069415 = queryNorm
            0.19345059 = fieldWeight in 56, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0390625 = fieldNorm(doc=56)
      0.5 = coord(1/2)
  0.375 = coord(3/8)
    Abstract
    The study reported here investigated the query expansion behavior of end-users interacting with a thesaurus-enhanced search system on the Web. Two groups, namely academic staff and postgraduate students, were recruited into this study. Data were collected from 90 searches performed by 30 users using the OVID interface to the CAB abstracts database. Data-gathering techniques included questionnaires, screen capturing software, and interviews. The results presented here relate to issues of search-topic and search-term characteristics, number and types of expanded queries, usefulness of thesaurus terms, and behavioral differences between academic staff and postgraduate students in their interaction. The key conclusions drawn were that (a) academic staff chose more narrow and synonymous terms than did postgraduate students, who generally selected broader and related terms; (b) topic complexity affected users' interaction with the thesaurus in that complex topics required more query expansion and search term selection; (c) users' prior topic-search experience appeared to have a significant effect on their selection and evaluation of thesaurus terms; (d) in 50% of the searches where additional terms were suggested from the thesaurus, users stated that they had not been aware of the terms at the beginning of the search; this observation was particularly noticeable in the case of postgraduate students.
    Date
    22. 7.2006 16:32:43
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  13. Marchionini, G.; Meadow, C.T.; Dwiggins, S.; Lin, X.; Jiabin, W.; Yuan, W.: ¬A study of user interaction with information retrieval interfaces : progress report (1991) 0.01 
    0.012372989 = product of:
  0.049491957 = sum of:
    0.032094855 = weight(_text_:retrieval in 4350) [ClassicSimilarity], result of:
      0.032094855 = score(doc=4350,freq=4.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.33085006 = fieldWeight in 4350, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0546875 = fieldNorm(doc=4350)
    0.017397102 = product of:
      0.034794204 = sum of:
        0.034794204 = weight(_text_:system in 4350) [ClassicSimilarity], result of:
          0.034794204 = score(doc=4350,freq=4.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.34448233 = fieldWeight in 4350, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0546875 = fieldNorm(doc=4350)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    Abstract
    Reports progress and future plans for a project to study the interactions of users with information retrieval interfaces. Tests are run with professional data base searchers and with end users who are members of a profession but have little or no searching experience. Interfaces tested include a command language search system used to search DIALOG bibliographic data bases, a non-procedural system that produces DIALOG commands, and several full text systems, including one using hypertext. The intent is to determine which kinds of users perform best with each type of interface. The project is being conducted jointly bay the University of Toronto and the University of Maryland
  14. Larson, R.R.: Evaluation of advanced retrieval techniques in an experimental online catalog (1992) 0.01 
    0.01236227 = product of:
  0.04944908 = sum of:
    0.038904842 = weight(_text_:retrieval in 481) [ClassicSimilarity], result of:
      0.038904842 = score(doc=481,freq=8.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.40105087 = fieldWeight in 481, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=481)
    0.010544236 = product of:
      0.021088472 = sum of:
        0.021088472 = weight(_text_:system in 481) [ClassicSimilarity], result of:
          0.021088472 = score(doc=481,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.20878783 = fieldWeight in 481, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.046875 = fieldNorm(doc=481)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    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.
  15. Hert, C.A.: User goals on an online public access catalog (1996) 0.01 
    0.01236227 = product of:
  0.04944908 = sum of:
    0.038904842 = weight(_text_:retrieval in 4381) [ClassicSimilarity], result of:
      0.038904842 = score(doc=4381,freq=8.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.40105087 = fieldWeight in 4381, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=4381)
    0.010544236 = product of:
      0.021088472 = sum of:
        0.021088472 = weight(_text_:system in 4381) [ClassicSimilarity], result of:
          0.021088472 = score(doc=4381,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.20878783 = fieldWeight in 4381, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.046875 = fieldNorm(doc=4381)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    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
  16. Pasanen-Tuomainen, I.: Analysis of subject searching in the TENTTU books database (1992) 0.01 
    0.012151096 = product of:
  0.048604384 = sum of:
    0.033692583 = weight(_text_:retrieval in 4252) [ClassicSimilarity], result of:
      0.033692583 = score(doc=4252,freq=6.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.34732026 = fieldWeight in 4252, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=4252)
    0.014911801 = product of:
      0.029823601 = sum of:
        0.029823601 = weight(_text_:system in 4252) [ClassicSimilarity], result of:
          0.029823601 = score(doc=4252,freq=4.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.29527056 = fieldWeight in 4252, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.046875 = fieldNorm(doc=4252)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    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
  17. Yerbury, H.; Parker, J.: Novice searchers' use of familiar structures in searching bibliographic information retrieval systems (1998) 0.01 
    0.012151096 = product of:
  0.048604384 = sum of:
    0.033692583 = weight(_text_:retrieval in 2874) [ClassicSimilarity], result of:
      0.033692583 = score(doc=2874,freq=6.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.34732026 = fieldWeight in 2874, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=2874)
    0.014911801 = product of:
      0.029823601 = sum of:
        0.029823601 = weight(_text_:system in 2874) [ClassicSimilarity], result of:
          0.029823601 = score(doc=2874,freq=4.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.29527056 = fieldWeight in 2874, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.046875 = fieldNorm(doc=2874)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    Abstract
    Reports results of a study of the use of metaphors as problem solving mechanisms by novice searchers of bibliographic databases. Metaphors provide a framework or 'familiar structure' of credible associations within which relationships in other domains may be considered. 28 students taking an undergraduate course in information retrieval at Sydney University of Technology, were recorded as they 'talked through' a search on a bibliographic retrieval system. The transcripts were analyzed using conventional methods and the NUDIST software package for qualitative research. A range of metaphors was apparent from the language use by students in the search process. Those which predominated were: a journey; human interaction; a building or matching process; a problem solving process, and a search for a quantity. Many of the studentes experiencing the interaction as a problem solving process or a search for quantity perceived the outcomes as successful. Concludes that when memory for operating methods and procedures is incomplete an unconscious approach through the use of a conceptual system which is consonant with the task at hand may also lead to success in bibliographic searching
  18. Koshman, S.: Testing user interaction with a prototype visualization-based information retrieval system (2005) 0.01 
    0.011931295 = product of:
  0.04772518 = sum of:
    0.028077152 = weight(_text_:retrieval in 3562) [ClassicSimilarity], result of:
      0.028077152 = score(doc=3562,freq=6.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.28943354 = fieldWeight in 3562, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=3562)
    0.019648025 = product of:
      0.03929605 = sum of:
        0.03929605 = weight(_text_:system in 3562) [ClassicSimilarity], result of:
          0.03929605 = score(doc=3562,freq=10.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.38905317 = fieldWeight in 3562, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3562)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    Abstract
    The VIBE (Visual Information Browsing Environment) prototype system, which was developed at Molde College in Norway in conjunction with researchers at the University of Pittsburgh, allows users to evaluate documents from a retrieved set that is graphically represented as geometric icons within one screen display. While the formal modeling behind VIBE and other information visualization retrieval systems is weIl known, user interaction with the system is not. This investigation tested the designer assumption that VIBE is a tool for a smart (expert) user and asked: What are the effects of the different levels of user expertise upon VIBE usability? Three user groups including novices, online searching experts, and VIBE system experts totaling 31 participants were tested over two sessions with VIBE. Participants selected appropriate features to complete tasks, but did not always solve the tasks correctly. Task timings improved over repeated use with VIBE and the nontypical visually oriented tasks were resolved more successfully than others. Statistically significant differences were not found among all parameters examined between novices and online experts. The VIBE system experts provided the predicted baseline for this study and the VIBE designer assumption was shown to be correct. The study's results point toward further exploration of cognitive preattentive processing, which may help to understand better the novice/expert paradigm when testing a visualized interface design for information retrieval.
  19. Markey, K.: Twenty-five years of end-user searching : part 2: future research directions (2007) 0.01 
    0.011412719 = product of:
  0.045650877 = sum of:
    0.028077152 = weight(_text_:retrieval in 443) [ClassicSimilarity], result of:
      0.028077152 = score(doc=443,freq=6.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.28943354 = fieldWeight in 443, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=443)
    0.017573725 = product of:
      0.03514745 = sum of:
        0.03514745 = weight(_text_:system in 443) [ClassicSimilarity], result of:
          0.03514745 = score(doc=443,freq=8.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.3479797 = fieldWeight in 443, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0390625 = fieldNorm(doc=443)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    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.
  20. 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 
    0.011258578 = product of:
  0.04503431 = sum of:
    0.036247447 = weight(_text_:retrieval in 4385) [ClassicSimilarity], result of:
      0.036247447 = score(doc=4385,freq=10.0), product of:
        0.09700725 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.032069415 = queryNorm
        0.37365708 = fieldWeight in 4385, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4385)
    0.008786863 = product of:
      0.017573725 = sum of:
        0.017573725 = weight(_text_:system in 4385) [ClassicSimilarity], result of:
          0.017573725 = score(doc=4385,freq=2.0), product of:
            0.10100432 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.032069415 = queryNorm
            0.17398985 = fieldWeight in 4385, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4385)
      0.5 = coord(1/2)
  0.25 = coord(2/8)
    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

Authors

Years

Languages

Types

  • a 252
  • el 4
  • r 4
  • m 2
  • b 1
  • s 1
  • More… Less…

Themes