Search (183 results, page 1 of 10)

0.05851543 = product of:
  0.15604115 = sum of:
    0.052393764 = weight(_text_:use in 6526) [ClassicSimilarity], result of:
      0.052393764 = score(doc=6526,freq=12.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.41435105 = fieldWeight in 6526, product of:
          3.4641016 = tf(freq=12.0), with freq of:
            12.0 = termFreq=12.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=6526)
    0.02087234 = weight(_text_:of in 6526) [ClassicSimilarity], result of:
      0.02087234 = score(doc=6526,freq=28.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.32322758 = fieldWeight in 6526, product of:
          5.2915025 = tf(freq=28.0), with freq of:
            28.0 = termFreq=28.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=6526)
    0.082775034 = sum of:
      0.0110352645 = weight(_text_:on in 6526) [ClassicSimilarity], result of:
        0.0110352645 = score(doc=6526,freq=2.0), product of:
          0.090823986 = queryWeight, product of:
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.041294612 = queryNorm
          0.121501654 = fieldWeight in 6526, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.0390625 = fieldNorm(doc=6526)
      0.07173977 = weight(_text_:line in 6526) [ClassicSimilarity], result of:
        0.07173977 = score(doc=6526,freq=2.0), product of:
          0.23157367 = queryWeight, product of:
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.041294612 = queryNorm
          0.30979243 = fieldWeight in 6526, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.0390625 = fieldNorm(doc=6526)
  0.375 = coord(3/8)

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

0.053012043 = product of:
  0.21204817 = sum of:
    0.013388081 = weight(_text_:of in 4130) [ClassicSimilarity], result of:
      0.013388081 = score(doc=4130,freq=2.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.20732689 = fieldWeight in 4130, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.09375 = fieldNorm(doc=4130)
    0.19866009 = sum of:
      0.026484637 = weight(_text_:on in 4130) [ClassicSimilarity], result of:
        0.026484637 = score(doc=4130,freq=2.0), product of:
          0.090823986 = queryWeight, product of:
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.041294612 = queryNorm
          0.29160398 = fieldWeight in 4130, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.09375 = fieldNorm(doc=4130)
      0.17217545 = weight(_text_:line in 4130) [ClassicSimilarity], result of:
        0.17217545 = score(doc=4130,freq=2.0), product of:
          0.23157367 = queryWeight, product of:
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.041294612 = queryNorm
          0.74350184 = fieldWeight in 4130, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.09375 = fieldNorm(doc=4130)
  0.25 = coord(2/8)

0.051229827 = product of:
  0.13661288 = sum of:
    0.020873476 = weight(_text_:retrieval in 600) [ClassicSimilarity], result of:
      0.020873476 = score(doc=600,freq=2.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.16710453 = fieldWeight in 600, 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=600)
    0.019324033 = weight(_text_:of in 600) [ClassicSimilarity], result of:
      0.019324033 = score(doc=600,freq=24.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.2992506 = fieldWeight in 600, product of:
          4.8989797 = tf(freq=24.0), with freq of:
            24.0 = termFreq=24.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=600)
    0.09641537 = sum of:
      0.024675604 = weight(_text_:on in 600) [ClassicSimilarity], result of:
        0.024675604 = score(doc=600,freq=10.0), product of:
          0.090823986 = queryWeight, product of:
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.041294612 = queryNorm
          0.271686 = fieldWeight in 600, product of:
            3.1622777 = tf(freq=10.0), with freq of:
              10.0 = termFreq=10.0
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.0390625 = fieldNorm(doc=600)
      0.07173977 = weight(_text_:line in 600) [ClassicSimilarity], result of:
        0.07173977 = score(doc=600,freq=2.0), product of:
          0.23157367 = queryWeight, product of:
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.041294612 = queryNorm
          0.30979243 = fieldWeight in 600, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.0390625 = fieldNorm(doc=600)
  0.375 = coord(3/8)

Abstract

Recent studies show that humans engage in multitasking behaviors as they seek and search information retrieval (IR) systems for information on more than one topic at the same time. For example, a Web search session by a single user may consist of searching on single topics or multitasking. Findings are presented from four separate studies of the prevalence of multitasking information seeking and searching by Web, IR system, and library users. Incidence of multitasking identified in the four different studies included: (1) users of the Excite Web search engine who completed a survey form, (2) Excite Web search engine users filtered from an Excite transaction log from 20 December 1999, (3) mediated on-line databases searches, and (4) academic library users. Findings include: (1) multitasking information seeking and searching is a common human behavior, (2) users may conduct information seeking and searching on related or unrelated topics, (3) Web or IR multitasking search sessions are longer than single topic sessions, (4) mean number of topics per Web search ranged of 1 to more than 10 topics with a mean of 2.11 topic changes per search session, and (4) many Web search topic changes were from hobbies to shopping and vice versa. A more complex model of human seeking and searching levels that incorporates multitasking information behaviors is presented, and a theoretical framework for human information coordinating behavior (HICB) is proposed. Multitasking information seeking and searching is developing as major research area that draws together IR and information seeking studies toward a focus on IR within the context of human information behavior. Implications for models of information seeking and searching, IR/Web systems design, and further research are discussed.

Source

Journal of the American Society for Information Science and technology. 53(2002) no.8, S.639-652

0.050119717 = product of:
  0.20047887 = sum of:
    0.018933605 = weight(_text_:of in 4605) [ClassicSimilarity], result of:
      0.018933605 = score(doc=4605,freq=16.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.2932045 = fieldWeight in 4605, product of:
          4.0 = tf(freq=16.0), with freq of:
            16.0 = termFreq=16.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=4605)
    0.18154526 = sum of:
      0.032436922 = weight(_text_:on in 4605) [ClassicSimilarity], result of:
        0.032436922 = score(doc=4605,freq=12.0), product of:
          0.090823986 = queryWeight, product of:
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.041294612 = queryNorm
          0.35714048 = fieldWeight in 4605, product of:
            3.4641016 = tf(freq=12.0), with freq of:
              12.0 = termFreq=12.0
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.046875 = fieldNorm(doc=4605)
      0.14910834 = weight(_text_:line in 4605) [ClassicSimilarity], result of:
        0.14910834 = score(doc=4605,freq=6.0), product of:
          0.23157367 = queryWeight, product of:
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.041294612 = queryNorm
          0.6438916 = fieldWeight in 4605, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.046875 = fieldNorm(doc=4605)
  0.25 = coord(2/8)

Abstract

This study sought to investigate the effects of cognitive style (field dependent and field independent) and on-line database search experience (novice and experienced) on the WWW search performance of undergraduate college students (n=48). It also attempted to find user factors that could be used to predict search efficiency. search performance, the dependent variable was defined in 2 ways: (1) time required for retrieving a relevant information item, and (2) the number of nodes traversed for retrieving a relevant information item. the search tasks required were carried out on a University Web site, and included a factual task and a topical search task of interest to the participant. Results indicated that while cognitive style (FD/FI) significantly influenced the search performance of novice searchers, the influence was greatly reduced in those searchers who had on-line database search experience. Based on the findings, suggestions for possible changes to the design of the current Web interface and to user training programs are provided

Source

Journal of the American Society for Information Science. 51(2000) no.6, S.558-566

0.047788814 = product of:
  0.09557763 = sum of:
    0.04174695 = weight(_text_:retrieval in 5163) [ClassicSimilarity], result of:
      0.04174695 = score(doc=5163,freq=8.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.33420905 = fieldWeight in 5163, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5163)
    0.030249555 = weight(_text_:use in 5163) [ClassicSimilarity], result of:
      0.030249555 = score(doc=5163,freq=4.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.23922569 = fieldWeight in 5163, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5163)
    0.015778005 = weight(_text_:of in 5163) [ClassicSimilarity], result of:
      0.015778005 = score(doc=5163,freq=16.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.24433708 = fieldWeight in 5163, product of:
          4.0 = tf(freq=16.0), with freq of:
            16.0 = termFreq=16.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5163)
    0.007803111 = product of:
      0.015606222 = sum of:
        0.015606222 = weight(_text_:on in 5163) [ClassicSimilarity], result of:
          0.015606222 = score(doc=5163,freq=4.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.1718293 = fieldWeight in 5163, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5163)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

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

0.047642168 = product of:
  0.095284335 = sum of:
    0.036153924 = weight(_text_:retrieval in 443) [ClassicSimilarity], result of:
      0.036153924 = score(doc=443,freq=6.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = 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)
    0.030249555 = weight(_text_:use in 443) [ClassicSimilarity], result of:
      0.030249555 = score(doc=443,freq=4.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.23922569 = fieldWeight in 443, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=443)
    0.019324033 = weight(_text_:of in 443) [ClassicSimilarity], result of:
      0.019324033 = score(doc=443,freq=24.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.2992506 = fieldWeight in 443, product of:
          4.8989797 = tf(freq=24.0), with freq of:
            24.0 = termFreq=24.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=443)
    0.00955682 = product of:
      0.01911364 = sum of:
        0.01911364 = weight(_text_:on in 443) [ClassicSimilarity], result of:
          0.01911364 = score(doc=443,freq=6.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.21044704 = fieldWeight in 443, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=443)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

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.

Source

Journal of the American Society for Information Science and Technology. 58(2007) no.8, S.1123-1130

0.04712932 = product of:
  0.09425864 = sum of:
    0.025667597 = weight(_text_:use in 1823) [ClassicSimilarity], result of:
      0.025667597 = score(doc=1823,freq=2.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.20298971 = fieldWeight in 1823, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.046875 = fieldNorm(doc=1823)
    0.024135707 = weight(_text_:of in 1823) [ClassicSimilarity], result of:
      0.024135707 = score(doc=1823,freq=26.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.37376386 = fieldWeight in 1823, product of:
          5.0990195 = tf(freq=26.0), with freq of:
            26.0 = termFreq=26.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=1823)
    0.006621159 = product of:
      0.013242318 = sum of:
        0.013242318 = weight(_text_:on in 1823) [ClassicSimilarity], result of:
          0.013242318 = score(doc=1823,freq=2.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.14580199 = fieldWeight in 1823, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.046875 = fieldNorm(doc=1823)
      0.5 = coord(1/2)
    0.037834182 = product of:
      0.075668365 = sum of:
        0.075668365 = weight(_text_:computers in 1823) [ClassicSimilarity], result of:
          0.075668365 = score(doc=1823,freq=2.0), product of:
            0.21710795 = queryWeight, product of:
              5.257537 = idf(docFreq=625, maxDocs=44218)
              0.041294612 = queryNorm
            0.34852874 = fieldWeight in 1823, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.257537 = idf(docFreq=625, maxDocs=44218)
              0.046875 = fieldNorm(doc=1823)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

This study reports an analysis of American Chemical Society electronic journal downloads at Cornell University by individual IP addresses. While the majority of users (IPs) limited themselves to a small number of both journals and article downloads, a small minority of heavy users had a large effect an total journal downloads. There was a very strong relationship between the number of article downloads and the number of users, implying that a user-population can be estimated by just knowing the total use of a journal. Aggregate users (i.e. Library Proxy Server and public library computers) can be regarded as a sample of the entire user population. Analysis of article downloads by format (PDF versus HTML) suggests that individuals are using the system like a networked photocopier, for the purposes of creating print-on-demand copies of articles.

Source

Journal of the American Society for Information Science and technology. 54(2003) no.11, S.1062-1068

0.04626683 = product of:
  0.09253366 = sum of:
    0.020873476 = weight(_text_:retrieval in 4331) [ClassicSimilarity], result of:
      0.020873476 = score(doc=4331,freq=2.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.16710453 = fieldWeight in 4331, 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=4331)
    0.04277933 = weight(_text_:use in 4331) [ClassicSimilarity], result of:
      0.04277933 = score(doc=4331,freq=8.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.3383162 = fieldWeight in 4331, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4331)
    0.019324033 = weight(_text_:of in 4331) [ClassicSimilarity], result of:
      0.019324033 = score(doc=4331,freq=24.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.2992506 = fieldWeight in 4331, product of:
          4.8989797 = tf(freq=24.0), with freq of:
            24.0 = termFreq=24.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4331)
    0.00955682 = product of:
      0.01911364 = sum of:
        0.01911364 = weight(_text_:on in 4331) [ClassicSimilarity], result of:
          0.01911364 = score(doc=4331,freq=6.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.21044704 = fieldWeight in 4331, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4331)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

Purpose - This paper seeks to report an investigation into the ways in which end-users perceive a thesaurus-enhanced search interface, in particular thesaurus and search interface usability. Design/methodology/approach - Thirty academic users, split between staff and postgraduate students, carrying out real search requests were observed during this study. Users were asked to comment on a range of thesaurus and interface characteristics including: ease of use, ease of learning, ease of browsing and navigation, problems and difficulties encountered while interacting with the system, and the effect of browsing on search term selection. Findings - The results suggest that interface usability is a factor affecting thesaurus browsing/navigation and other information-searching behaviours. Academic staff viewed the function of a thesaurus as being useful for narrowing down a search and providing alternative search terms, while postgraduates stressed the role of the thesaurus for broadening searches and providing new terms. Originality/value - The paper provides an insight into the ways in which end-users make use of and interact with a thesaurus-enhanced search interface. This area is new since previous research has particularly focused on how professional searchers and librarians make use of thesauri and thesaurus-enhanced search interfaces. The research reported here suggests that end-users with varying levels of domain knowledge are able to use thesauri that are integrated into search interfaces. It also provides design implications for search interface developers as well as information professionals who are involved in teaching online searching.

Source

Journal of documentation. 61(2005) no.5, S.640-656

Theme

Semantisches Umfeld in Indexierung u. Retrieval

0.04414038 = product of:
  0.08828076 = sum of:
    0.020873476 = weight(_text_:retrieval in 198) [ClassicSimilarity], result of:
      0.020873476 = score(doc=198,freq=2.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.16710453 = fieldWeight in 198, 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=198)
    0.037047986 = weight(_text_:use in 198) [ClassicSimilarity], result of:
      0.037047986 = score(doc=198,freq=6.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.29299045 = fieldWeight in 198, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=198)
    0.019324033 = weight(_text_:of in 198) [ClassicSimilarity], result of:
      0.019324033 = score(doc=198,freq=24.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.2992506 = fieldWeight in 198, product of:
          4.8989797 = tf(freq=24.0), with freq of:
            24.0 = termFreq=24.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=198)
    0.0110352645 = product of:
      0.022070529 = sum of:
        0.022070529 = weight(_text_:on in 198) [ClassicSimilarity], result of:
          0.022070529 = score(doc=198,freq=8.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.24300331 = fieldWeight in 198, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=198)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

Conventional wisdom holds that queries to information retrieval systems will yield more relevant results if they contain multiple topic-related terms and use Boolean and phrase operators to enhance interpretation. Although studies have shown that the users of Web-based search engines typically enter short, term-based queries and rarely use search operators, little information exists concerning the effects of term and operator usage on the relevancy of search results. In this study, search engine users formulated queries on eight search topics. Each query was submitted to the user-specified search engine, and relevancy ratings for the retrieved pages were assigned. Expert-formulated queries were also submitted and provided a basis for comparing relevancy ratings across search engines. Data analysis based on our research model of the term and operator factors affecting relevancy was then conducted. The results show that the difference in the number of terms between expert and nonexpert searches, the percentage of matching terms between those searches, and the erroneous use of nonsupported operators in nonexpert searches explain most of the variation in the relevancy of search results. These findings highlight the need for designing search engine interfaces that provide greater support in the areas of term selection and operator usage

Source

Journal of the American Society for Information Science and technology. 53(2002) no.2, S.95-108

0.041463543 = product of:
  0.082927085 = sum of:
    0.029519552 = weight(_text_:retrieval in 1081) [ClassicSimilarity], result of:
      0.029519552 = score(doc=1081,freq=4.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.23632148 = fieldWeight in 1081, 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=1081)
    0.030249555 = weight(_text_:use in 1081) [ClassicSimilarity], result of:
      0.030249555 = score(doc=1081,freq=4.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.23922569 = fieldWeight in 1081, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=1081)
    0.017640345 = weight(_text_:of in 1081) [ClassicSimilarity], result of:
      0.017640345 = score(doc=1081,freq=20.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.27317715 = fieldWeight in 1081, product of:
          4.472136 = tf(freq=20.0), with freq of:
            20.0 = termFreq=20.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=1081)
    0.0055176322 = product of:
      0.0110352645 = sum of:
        0.0110352645 = weight(_text_:on in 1081) [ClassicSimilarity], result of:
          0.0110352645 = score(doc=1081,freq=2.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.121501654 = fieldWeight in 1081, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1081)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

The aim of the work described in this paper is to evaluate the influencing effects of query-biased summaries in web searching. For this purpose, a summarisation system has been developed, and a summary tailored to the user's query is generated automatically for each document retrieved. The system aims to provide both a better means of assessing document relevance than titles or abstracts typical of many web search result lists. Through visiting each result page at retrieval-time, the system provides the user with an idea of the current page content and thus deals with the dynamic nature of the web. To examine the effectiveness of this approach, a task-oriented, comparative evaluation between four different web retrieval systems was performed; two that use query-biased summarisation, and two that use the standard ranked titles/abstracts approach. The results from the evaluation indicate that query-biased summarisation techniques appear to be more useful and effective in helping users gauge document relevance than the traditional ranked titles/abstracts approach. The same methodology was used to compare the effectiveness of two of the web's major search engines; AltaVista and Google.

0.041165598 = product of:
  0.082331195 = sum of:
    0.029519552 = weight(_text_:retrieval in 1051) [ClassicSimilarity], result of:
      0.029519552 = score(doc=1051,freq=4.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.23632148 = fieldWeight in 1051, 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=1051)
    0.030249555 = weight(_text_:use in 1051) [ClassicSimilarity], result of:
      0.030249555 = score(doc=1051,freq=4.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.23922569 = fieldWeight in 1051, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=1051)
    0.014758972 = weight(_text_:of in 1051) [ClassicSimilarity], result of:
      0.014758972 = score(doc=1051,freq=14.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.22855641 = fieldWeight in 1051, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=1051)
    0.007803111 = product of:
      0.015606222 = sum of:
        0.015606222 = weight(_text_:on in 1051) [ClassicSimilarity], result of:
          0.015606222 = score(doc=1051,freq=4.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.1718293 = fieldWeight in 1051, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1051)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

This paper presents a detailed analysis of the structure and components of queries written by experimental participants in a study that manipulated two factors found to affect end-user information retrieval performance: training in Boolean logic and the type of search interface. As reported previously, we found that both Boolean training and the use of an assisted interface improved the participants' ability to find correct responses to information requests. Here, we examine the impact of these training and interface manipulations on the Boolean operators and search terms that comprise the submitted queries. Our analysis shows that both Boolean training and the use of an assisted interface improved the participants' ability to correctly utilize various operators. An unexpected finding is that this training also had a positive impact on term selection. The terms and, to a lesser extent, the operators comprising a query were important factors affecting the participants' performance in query tasks. Our findings demonstrate that even small training interventions can improve the users' search performance and highlight the need for additional information retrieval research into how search interfaces can provide superior support to today's untrained users of the Web.

0.040799852 = product of:
  0.16319941 = sum of:
    0.014968331 = weight(_text_:of in 4810) [ClassicSimilarity], result of:
      0.014968331 = score(doc=4810,freq=10.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.23179851 = fieldWeight in 4810, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=4810)
    0.14823107 = sum of:
      0.026484637 = weight(_text_:on in 4810) [ClassicSimilarity], result of:
        0.026484637 = score(doc=4810,freq=8.0), product of:
          0.090823986 = queryWeight, product of:
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.041294612 = queryNorm
          0.29160398 = fieldWeight in 4810, product of:
            2.828427 = tf(freq=8.0), with freq of:
              8.0 = termFreq=8.0
            2.199415 = idf(docFreq=13325, maxDocs=44218)
            0.046875 = fieldNorm(doc=4810)
      0.12174644 = weight(_text_:line in 4810) [ClassicSimilarity], result of:
        0.12174644 = score(doc=4810,freq=4.0), product of:
          0.23157367 = queryWeight, product of:
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.041294612 = queryNorm
          0.52573526 = fieldWeight in 4810, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            5.6078424 = idf(docFreq=440, maxDocs=44218)
            0.046875 = fieldNorm(doc=4810)
  0.25 = coord(2/8)

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

0.040736318 = product of:
  0.081472635 = sum of:
    0.025048172 = weight(_text_:retrieval in 611) [ClassicSimilarity], result of:
      0.025048172 = score(doc=611,freq=2.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.20052543 = fieldWeight in 611, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=611)
    0.025667597 = weight(_text_:use in 611) [ClassicSimilarity], result of:
      0.025667597 = score(doc=611,freq=2.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.20298971 = fieldWeight in 611, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.046875 = fieldNorm(doc=611)
    0.024135707 = weight(_text_:of in 611) [ClassicSimilarity], result of:
      0.024135707 = score(doc=611,freq=26.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.37376386 = fieldWeight in 611, product of:
          5.0990195 = tf(freq=26.0), with freq of:
            26.0 = termFreq=26.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=611)
    0.006621159 = product of:
      0.013242318 = sum of:
        0.013242318 = weight(_text_:on in 611) [ClassicSimilarity], result of:
          0.013242318 = score(doc=611,freq=2.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.14580199 = fieldWeight in 611, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.046875 = fieldNorm(doc=611)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

Purpose - Apart from information retrieval there is virtually no other area of information science that has occasioned as much research effort and writing as "user studies". Within user studies the investigation of "information needs" has been the subject of much debate and no little confusion. The aim of this paper is to attempt to reduce this confusion by devoting attention to the definition of some concepts and by proposing the basis for a theory of the motivations for information-seeking behaviour. Design/methodology/approach - The paper describes the issues of user studies and information needs within the context of information science. Findings - The paper finds that the problem seems to lie, not so much with the lack of a single definition, as with a failure to use a definition appropriate to the level, and purpose of the investigation. Originality/value - The analysis may be used as a springboard to research based upon a wider, holistic view of the information user.

Footnote

Original in: Journal of documentation. 37(1981), S.3-15.

Source

Journal of documentation. 62(2006) no.6, S.658-670

0.04066919 = product of:
  0.08133838 = sum of:
    0.029519552 = weight(_text_:retrieval in 967) [ClassicSimilarity], result of:
      0.029519552 = score(doc=967,freq=4.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.23632148 = fieldWeight in 967, 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=967)
    0.021389665 = weight(_text_:use in 967) [ClassicSimilarity], result of:
      0.021389665 = score(doc=967,freq=2.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.1691581 = fieldWeight in 967, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=967)
    0.02087234 = weight(_text_:of in 967) [ClassicSimilarity], result of:
      0.02087234 = score(doc=967,freq=28.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.32322758 = fieldWeight in 967, product of:
          5.2915025 = tf(freq=28.0), with freq of:
            28.0 = termFreq=28.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=967)
    0.00955682 = product of:
      0.01911364 = sum of:
        0.01911364 = weight(_text_:on in 967) [ClassicSimilarity], result of:
          0.01911364 = score(doc=967,freq=6.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.21044704 = fieldWeight in 967, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=967)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

A user's single session with a Web search engine or information retrieval (IR) system may consist of seeking information on single or multiple topics, and switch between tasks or multitasking information behavior. Most Web search sessions consist of two queries of approximately two words. However, some Web search sessions consist of three or more queries. We present findings from two studies. First, a study of two-query search sessions on the AltaVista Web search engine, and second, a study of three or more query search sessions on the AltaVista Web search engine. We examine the degree of multitasking search and information task switching during these two sets of AltaVista Web search sessions. A sample of two-query and three or more query sessions were filtered from AltaVista transaction logs from 2002 and qualitatively analyzed. Sessions ranged in duration from less than a minute to a few hours. Findings include: (1) 81% of two-query sessions included multiple topics, (2) 91.3% of three or more query sessions included multiple topics, (3) there are a broad variety of topics in multitasking search sessions, and (4) three or more query sessions sometimes contained frequent topic changes. Multitasking is found to be a growing element in Web searching. This paper proposes an approach to interactive information retrieval (IR) contextually within a multitasking framework. The implications of our findings for Web design and further research are discussed.

0.04032982 = product of:
  0.08065964 = sum of:
    0.020873476 = weight(_text_:retrieval in 5909) [ClassicSimilarity], result of:
      0.020873476 = score(doc=5909,freq=2.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.16710453 = fieldWeight in 5909, 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=5909)
    0.030249555 = weight(_text_:use in 5909) [ClassicSimilarity], result of:
      0.030249555 = score(doc=5909,freq=4.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.23922569 = fieldWeight in 5909, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5909)
    0.01850135 = weight(_text_:of in 5909) [ClassicSimilarity], result of:
      0.01850135 = score(doc=5909,freq=22.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.28651062 = fieldWeight in 5909, product of:
          4.690416 = tf(freq=22.0), with freq of:
            22.0 = termFreq=22.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5909)
    0.0110352645 = product of:
      0.022070529 = sum of:
        0.022070529 = weight(_text_:on in 5909) [ClassicSimilarity], result of:
          0.022070529 = score(doc=5909,freq=8.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.24300331 = fieldWeight in 5909, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5909)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

This article focuses on the relevance judgments made by health information users who use the Web. Health information users were conceptualized as motivated information users concerned about how an environmental issue affects their health. Users identified their own environmental health interests and conducted a Web search of a particular environmental health Web site. Users were asked to identify (by highlighting with a mouse) the criteria they use to assess relevance in both Web search engine surrogates and full-text Web documents. Content analysis of document criteria highlighted by users identified the criteria these users relied on most often. Key criteria identified included (in order of frequency of appearance) research, topic, scope, data, influence, affiliation, Web characteristics, and authority/ person. A power-law distribution of criteria was observed (a few criteria represented most of the highlighted regions, with a long tail of occasionally used criteria). Implications of this work are that information retrieval (IR) systems should be tailored in terms of users' tendencies to rely on certain document criteria, and that relevance research should combine methods to gather richer, contextualized data. Metadata for IR systems, such as that used in search engine surrogates, could be improved by taking into account actual usage of relevance criteria. Such metadata should be user-centered (based on data from users, as in this study) and contextappropriate (fit to users' situations and tasks).

Source

Journal of the American Society for Information Science and Technology. 57(2006) no.10, S.1368-1382

0.039781604 = product of:
  0.07956321 = sum of:
    0.025048172 = weight(_text_:retrieval in 2246) [ClassicSimilarity], result of:
      0.025048172 = score(doc=2246,freq=2.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.20052543 = fieldWeight in 2246, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=2246)
    0.036299463 = weight(_text_:use in 2246) [ClassicSimilarity], result of:
      0.036299463 = score(doc=2246,freq=4.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.2870708 = fieldWeight in 2246, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.046875 = fieldNorm(doc=2246)
    0.011594418 = weight(_text_:of in 2246) [ClassicSimilarity], result of:
      0.011594418 = score(doc=2246,freq=6.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.17955035 = fieldWeight in 2246, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=2246)
    0.006621159 = product of:
      0.013242318 = sum of:
        0.013242318 = weight(_text_:on in 2246) [ClassicSimilarity], result of:
          0.013242318 = score(doc=2246,freq=2.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.14580199 = fieldWeight in 2246, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.046875 = fieldNorm(doc=2246)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

As more people gain at-home access to the Internet, information seeking an the Web has become embedded in everyday life. The objective of this study was to characterize the home as an information use environment and to identify a range of information seeking and Websearch behaviors at home. Twelve Northern California residents were recruited, and the data were collected through semi-structured at-home interviews based an a self-reported Search Activities Diary that subjects kept over a 3-5 day period. The data were analyzed an four levels: home environment, information seeking goals, information retrieval interaction, and search query. Eindings indicated that the home, indeed, provided a distinct information use environment beyond physical setting alone in which the subjects used the Web for diverse purposes and interests. Based an the findings, the relationships among home environment, Web context, and interaction situation were identified with respect to user goals and information-seeking behaviors.

Source

Journal of the American Society for Information Science and Technology. 55(2004) no.8, S.743-753

0.03839685 = product of:
  0.0767937 = sum of:
    0.030249555 = weight(_text_:use in 6117) [ClassicSimilarity], result of:
      0.030249555 = score(doc=6117,freq=4.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.23922569 = fieldWeight in 6117, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.0390625 = fieldNorm(doc=6117)
    0.023000197 = weight(_text_:of in 6117) [ClassicSimilarity], result of:
      0.023000197 = score(doc=6117,freq=34.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.35617945 = fieldWeight in 6117, product of:
          5.8309517 = tf(freq=34.0), with freq of:
            34.0 = termFreq=34.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=6117)
    0.00955682 = product of:
      0.01911364 = sum of:
        0.01911364 = weight(_text_:on in 6117) [ClassicSimilarity], result of:
          0.01911364 = score(doc=6117,freq=6.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.21044704 = fieldWeight in 6117, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.0390625 = fieldNorm(doc=6117)
      0.5 = coord(1/2)
    0.013987125 = product of:
      0.02797425 = sum of:
        0.02797425 = weight(_text_:22 in 6117) [ClassicSimilarity], result of:
          0.02797425 = score(doc=6117,freq=2.0), product of:
            0.1446067 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.041294612 = queryNorm
            0.19345059 = fieldWeight in 6117, 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=6117)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

Several previous studies have measured differences in the information search success of novices and experts. However, the definitions of novices and experts have varied greatly between the studies, and so have the measures used for search success. Instead of dividing the searchers into different groups based on their expertise, we chose to model search success with task completion speed, TCS. Towards this goal, 22 participants performed three fact-finding tasks and two broader tasks in an observational user study. In our model, there were two variables related to the Web experience of the participants. Other variables included, for example, the speed of query iteration, the length of the queries, the proportion of precise queries, and the speed of evaluating result documents. Our results showed that the variables related to Web experience had expected effects on TCS. The increase in the years of Web use was related to improvement in TCS in the broader tasks, whereas the less frequent Web use was related to a decrease in TCS in the fact-finding tasks. Other variables having significant effects on TCS in either of the task types were the speed of composing queries, the average number of query terms per query, the proportion of precise queries, and the participants' own evaluation of their search skills. In addition to the statistical models, we present several qualitative findings of the participants' search strategies. These results give valuable insight into the successful strategies in Web search beyond the previous knowledge of the expert-novice differences.

Source

Journal of the American Society for Information Science and Technology. 57(2006) no.12, S.1678-1693

0.037486188 = product of:
  0.09996317 = sum of:
    0.035423465 = weight(_text_:retrieval in 897) [ClassicSimilarity], result of:
      0.035423465 = score(doc=897,freq=4.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.2835858 = fieldWeight in 897, 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=897)
    0.044457585 = weight(_text_:use in 897) [ClassicSimilarity], result of:
      0.044457585 = score(doc=897,freq=6.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.35158852 = fieldWeight in 897, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.046875 = fieldNorm(doc=897)
    0.02008212 = weight(_text_:of in 897) [ClassicSimilarity], result of:
      0.02008212 = score(doc=897,freq=18.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.3109903 = fieldWeight in 897, product of:
          4.2426405 = tf(freq=18.0), with freq of:
            18.0 = termFreq=18.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=897)
  0.375 = coord(3/8)

Abstract

Finding information an the Web can be a much more complex search process than previously experienced an many pre-Web information retrieval systems given that finding content online does not have to happen via a search algorithm typed into a search field. Rather, the Web allows for a myriad of search strategies. Although there are numerous studies of Web search techniques, these studies often limit their focus to just one part of the search process and are not based an the behavior of the general user population, nor do they include information about the users. To remedy these shortcomings, this project looks at how peopie find information online in the context of their other media use, their general Internet use patterns, in addition to using information about their demographic background and social support networks. This article describes the methodology in detail, and suggests that a mix of survey instruments and in-person observations can yield the type of rich data set that is necessary to understand in depth the differences in people's information retrieval behavior online.

Source

Journal of the American Society for Information Science and technology. 53(2002) no.14, S.1239-1244

0.037021082 = product of:
  0.074042164 = sum of:
    0.036299463 = weight(_text_:use in 197) [ClassicSimilarity], result of:
      0.036299463 = score(doc=197,freq=4.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.2870708 = fieldWeight in 197, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.046875 = fieldNorm(doc=197)
    0.011594418 = weight(_text_:of in 197) [ClassicSimilarity], result of:
      0.011594418 = score(doc=197,freq=6.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.17955035 = fieldWeight in 197, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=197)
    0.009363732 = product of:
      0.018727465 = sum of:
        0.018727465 = weight(_text_:on in 197) [ClassicSimilarity], result of:
          0.018727465 = score(doc=197,freq=4.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.20619515 = fieldWeight in 197, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.046875 = fieldNorm(doc=197)
      0.5 = coord(1/2)
    0.016784549 = product of:
      0.033569098 = sum of:
        0.033569098 = weight(_text_:22 in 197) [ClassicSimilarity], result of:
          0.033569098 = score(doc=197,freq=2.0), product of:
            0.1446067 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.041294612 = queryNorm
            0.23214069 = fieldWeight in 197, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=197)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

Four focus groups were held with young Web users (10 to 13 years of age) to explore design criteria for Web portals. The focus group participants commented upon four existing portals designed with young users in mind: Ask Jeeves for Kids, KidsClick, Lycos Zone, and Yahooligans! This article reports their first impressions on using these portals, their likes and dislikes, and their suggestions for improvements. Design criteria for children's Web portals are elaborated based upon these comments under four headings: portal goals, visual design, information architecture, and personalization. An ideal portal should cater for both educational and entertainment needs, use attractive screen designs based especially on effective use of color, graphics, and animation, provide both keyword search facilities and browsable subject categories, and allow individual user personalization in areas such as color and graphics

Date

2. 6.2005 10:34:22

Source

Journal of the American Society for Information Science and technology. 53(2002) no.2, S.79-94

0.036866955 = product of:
  0.07373391 = sum of:
    0.025048172 = weight(_text_:retrieval in 2234) [ClassicSimilarity], result of:
      0.025048172 = score(doc=2234,freq=2.0), product of:
        0.124912694 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.041294612 = queryNorm
        0.20052543 = fieldWeight in 2234, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=2234)
    0.025667597 = weight(_text_:use in 2234) [ClassicSimilarity], result of:
      0.025667597 = score(doc=2234,freq=2.0), product of:
        0.12644777 = queryWeight, product of:
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.041294612 = queryNorm
        0.20298971 = fieldWeight in 2234, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.0620887 = idf(docFreq=5623, maxDocs=44218)
          0.046875 = fieldNorm(doc=2234)
    0.016396983 = weight(_text_:of in 2234) [ClassicSimilarity], result of:
      0.016396983 = score(doc=2234,freq=12.0), product of:
        0.06457475 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.041294612 = queryNorm
        0.25392252 = fieldWeight in 2234, product of:
          3.4641016 = tf(freq=12.0), with freq of:
            12.0 = termFreq=12.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=2234)
    0.006621159 = product of:
      0.013242318 = sum of:
        0.013242318 = weight(_text_:on in 2234) [ClassicSimilarity], result of:
          0.013242318 = score(doc=2234,freq=2.0), product of:
            0.090823986 = queryWeight, product of:
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.041294612 = queryNorm
            0.14580199 = fieldWeight in 2234, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.199415 = idf(docFreq=13325, maxDocs=44218)
              0.046875 = fieldNorm(doc=2234)
      0.5 = coord(1/2)
  0.5 = coord(4/8)

Abstract

This study explores the navigation behaviour of all users of a large web service, Renardus, using web log analysis. Renardus provides integrated searching and browsing access to quality-controlled web resources from major individual subject gateway services. The main navigation feature is subject browsing through the Dewey Decimal Classification (DDC) based on mapping of classes of resources from the distributed gateways to the DDC structure. Among the more surprising results are the hugely dominant share of browsing activities, the good use of browsing support features like the graphical fish-eye overviews, rather long and varied navigation sequences, as well as extensive hierarchical directory-style browsing through the large DDC system.

Theme

Klassifikationssysteme im Online-Retrieval