Document (#31873)

Author
Lochore, S.
Title
How good are the free digital reference services? : a comparison of library-based and expert services
Source
Library review. 53(2004) no.1, S.24-29
Year
2004
Abstract
Reports on a small-scale experiment designed to assess the performance of the freely available digital reference services. Ten questions - five purely fact-finding, and five on the subject of political affairs - were submitted to three digital reference services (DRS), namely, AllExperts, Ask a Librarian, and UCLA E-Mail Reference Service. The findings show that DRS deliver generally accurate information although the time taken to do so varies both between services and within a particular service. The collaborative nature of such endeavours is also likely to continue as individual institutions seek to limit the expense they incur. Instructing users on how to find information independently has always been one of the hallmarks of academic reference services, and this has to be given priority in a digital environment.
Content
Vgl. auch unter: http://www.emeraldinsight.com/10.1108/00242530410514766.
Theme
Informationsdienstleistungen
Internet
Object
AllExperts
Ask a Librarian

Similar documents (content)

  1. McCrea, R.: Evaluation of two library-based and one expert reference service on the Web (2004) 0.21
    0.20659074 = sum of:
      0.20659074 = product of:
        0.8607948 = sum of:
          0.06533473 = weight(abstract_txt:mail in 5757) [ClassicSimilarity], result of:
            0.06533473 = score(doc=5757,freq=1.0), product of:
              0.11600109 = queryWeight, product of:
                6.0077353 = idf(docFreq=296, maxDocs=44421)
                0.019308623 = queryNorm
              0.56322515 = fieldWeight in 5757, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0077353 = idf(docFreq=296, maxDocs=44421)
                0.09375 = fieldNorm(doc=5757)
          0.075786956 = weight(abstract_txt:namely in 5757) [ClassicSimilarity], result of:
            0.075786956 = score(doc=5757,freq=1.0), product of:
              0.12806456 = queryWeight, product of:
                1.0507114 = boost
                6.312396 = idf(docFreq=218, maxDocs=44421)
                0.019308623 = queryNorm
              0.5917871 = fieldWeight in 5757, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.312396 = idf(docFreq=218, maxDocs=44421)
                0.09375 = fieldNorm(doc=5757)
          0.08171399 = weight(abstract_txt:service in 5757) [ClassicSimilarity], result of:
            0.08171399 = score(doc=5757,freq=2.0), product of:
              0.13465741 = queryWeight, product of:
                1.5236987 = boost
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.019308623 = queryNorm
              0.60682875 = fieldWeight in 5757, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.09375 = fieldNorm(doc=5757)
          0.13812988 = weight(abstract_txt:digital in 5757) [ClassicSimilarity], result of:
            0.13812988 = score(doc=5757,freq=2.0), product of:
              0.2407508 = queryWeight, product of:
                2.8812625 = boost
                4.3274655 = idf(docFreq=1593, maxDocs=44421)
                0.019308623 = queryNorm
              0.57374626 = fieldWeight in 5757, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.3274655 = idf(docFreq=1593, maxDocs=44421)
                0.09375 = fieldNorm(doc=5757)
          0.23229735 = weight(abstract_txt:reference in 5757) [ClassicSimilarity], result of:
            0.23229735 = score(doc=5757,freq=3.0), product of:
              0.3203896 = queryWeight, product of:
                3.7161493 = boost
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.019308623 = queryNorm
              0.72504646 = fieldWeight in 5757, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.09375 = fieldNorm(doc=5757)
          0.26753187 = weight(abstract_txt:services in 5757) [ClassicSimilarity], result of:
            0.26753187 = score(doc=5757,freq=4.0), product of:
              0.33987045 = queryWeight, product of:
                4.1927724 = boost
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.019308623 = queryNorm
              0.78715837 = fieldWeight in 5757, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.09375 = fieldNorm(doc=5757)
        0.24 = coord(6/25)
    
  2. Lewis, D.W.: Making academic reference service work (1994) 0.16
    0.15660463 = sum of:
      0.15660463 = product of:
        0.7830231 = sum of:
          0.11602917 = weight(abstract_txt:priority in 8322) [ClassicSimilarity], result of:
            0.11602917 = score(doc=8322,freq=1.0), product of:
              0.19210188 = queryWeight, product of:
                1.2868702 = boost
                7.731176 = idf(docFreq=52, maxDocs=44421)
                0.019308623 = queryNorm
              0.6039981 = fieldWeight in 8322, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.731176 = idf(docFreq=52, maxDocs=44421)
                0.078125 = fieldNorm(doc=8322)
          0.08339899 = weight(abstract_txt:service in 8322) [ClassicSimilarity], result of:
            0.08339899 = score(doc=8322,freq=3.0), product of:
              0.13465741 = queryWeight, product of:
                1.5236987 = boost
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.019308623 = queryNorm
              0.61934197 = fieldWeight in 8322, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.078125 = fieldNorm(doc=8322)
          0.09065792 = weight(abstract_txt:five in 8322) [ClassicSimilarity], result of:
            0.09065792 = score(doc=8322,freq=1.0), product of:
              0.2053213 = queryWeight, product of:
                1.8814858 = boost
                5.6517344 = idf(docFreq=423, maxDocs=44421)
                0.019308623 = queryNorm
              0.44154173 = fieldWeight in 8322, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6517344 = idf(docFreq=423, maxDocs=44421)
                0.078125 = fieldNorm(doc=8322)
          0.33529237 = weight(abstract_txt:reference in 8322) [ClassicSimilarity], result of:
            0.33529237 = score(doc=8322,freq=9.0), product of:
              0.3203896 = queryWeight, product of:
                3.7161493 = boost
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.019308623 = queryNorm
              1.0465145 = fieldWeight in 8322, product of:
                3.0 = tf(freq=9.0), with freq of:
                  9.0 = termFreq=9.0
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.078125 = fieldNorm(doc=8322)
          0.15764466 = weight(abstract_txt:services in 8322) [ClassicSimilarity], result of:
            0.15764466 = score(doc=8322,freq=2.0), product of:
              0.33987045 = queryWeight, product of:
                4.1927724 = boost
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.019308623 = queryNorm
              0.4638375 = fieldWeight in 8322, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.078125 = fieldNorm(doc=8322)
        0.2 = coord(5/25)
    
  3. Lewis, K.M.; DeGroote, S.L.: Digital reference access points : an analysis of usage (2008) 0.16
    0.15633337 = sum of:
      0.15633337 = product of:
        0.65138906 = sum of:
          0.061598178 = weight(abstract_txt:mail in 1551) [ClassicSimilarity], result of:
            0.061598178 = score(doc=1551,freq=2.0), product of:
              0.11600109 = queryWeight, product of:
                6.0077353 = idf(docFreq=296, maxDocs=44421)
                0.019308623 = queryNorm
              0.5310138 = fieldWeight in 1551, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.0077353 = idf(docFreq=296, maxDocs=44421)
                0.0625 = fieldNorm(doc=1551)
          0.09747951 = weight(abstract_txt:submitted in 1551) [ClassicSimilarity], result of:
            0.09747951 = score(doc=1551,freq=2.0), product of:
              0.15752847 = queryWeight, product of:
                1.1653289 = boost
                7.000987 = idf(docFreq=109, maxDocs=44421)
                0.019308623 = queryNorm
              0.61880565 = fieldWeight in 1551, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.000987 = idf(docFreq=109, maxDocs=44421)
                0.0625 = fieldNorm(doc=1551)
          0.038520344 = weight(abstract_txt:service in 1551) [ClassicSimilarity], result of:
            0.038520344 = score(doc=1551,freq=1.0), product of:
              0.13465741 = queryWeight, product of:
                1.5236987 = boost
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.019308623 = queryNorm
              0.28606182 = fieldWeight in 1551, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.0625 = fieldNorm(doc=1551)
          0.14560167 = weight(abstract_txt:digital in 1551) [ClassicSimilarity], result of:
            0.14560167 = score(doc=1551,freq=5.0), product of:
              0.2407508 = queryWeight, product of:
                2.8812625 = boost
                4.3274655 = idf(docFreq=1593, maxDocs=44421)
                0.019308623 = queryNorm
              0.6047817 = fieldWeight in 1551, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.3274655 = idf(docFreq=1593, maxDocs=44421)
                0.0625 = fieldNorm(doc=1551)
          0.21901205 = weight(abstract_txt:reference in 1551) [ClassicSimilarity], result of:
            0.21901205 = score(doc=1551,freq=6.0), product of:
              0.3203896 = queryWeight, product of:
                3.7161493 = boost
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.019308623 = queryNorm
              0.6835804 = fieldWeight in 1551, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.0625 = fieldNorm(doc=1551)
          0.08917729 = weight(abstract_txt:services in 1551) [ClassicSimilarity], result of:
            0.08917729 = score(doc=1551,freq=1.0), product of:
              0.33987045 = queryWeight, product of:
                4.1927724 = boost
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.019308623 = queryNorm
              0.2623861 = fieldWeight in 1551, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.0625 = fieldNorm(doc=1551)
        0.24 = coord(6/25)
    
  4. Janes, J.; Hill, C.; Rolfe, A.: Ask-an-expert services analysis (2001) 0.14
    0.14000775 = sum of:
      0.14000775 = product of:
        0.70003873 = sum of:
          0.0484551 = weight(abstract_txt:continue in 847) [ClassicSimilarity], result of:
            0.0484551 = score(doc=847,freq=1.0), product of:
              0.124543145 = queryWeight, product of:
                1.0361649 = boost
                6.225004 = idf(docFreq=238, maxDocs=44421)
                0.019308623 = queryNorm
              0.38906276 = fieldWeight in 847, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.225004 = idf(docFreq=238, maxDocs=44421)
                0.0625 = fieldNorm(doc=847)
          0.038520344 = weight(abstract_txt:service in 847) [ClassicSimilarity], result of:
            0.038520344 = score(doc=847,freq=1.0), product of:
              0.13465741 = queryWeight, product of:
                1.5236987 = boost
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.019308623 = queryNorm
              0.28606182 = fieldWeight in 847, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.0625 = fieldNorm(doc=847)
          0.14560167 = weight(abstract_txt:digital in 847) [ClassicSimilarity], result of:
            0.14560167 = score(doc=847,freq=5.0), product of:
              0.2407508 = queryWeight, product of:
                2.8812625 = boost
                4.3274655 = idf(docFreq=1593, maxDocs=44421)
                0.019308623 = queryNorm
              0.6047817 = fieldWeight in 847, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.3274655 = idf(docFreq=1593, maxDocs=44421)
                0.0625 = fieldNorm(doc=847)
          0.19992974 = weight(abstract_txt:reference in 847) [ClassicSimilarity], result of:
            0.19992974 = score(doc=847,freq=5.0), product of:
              0.3203896 = queryWeight, product of:
                3.7161493 = boost
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.019308623 = queryNorm
              0.6240207 = fieldWeight in 847, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.0625 = fieldNorm(doc=847)
          0.26753187 = weight(abstract_txt:services in 847) [ClassicSimilarity], result of:
            0.26753187 = score(doc=847,freq=9.0), product of:
              0.33987045 = queryWeight, product of:
                4.1927724 = boost
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.019308623 = queryNorm
              0.78715837 = fieldWeight in 847, product of:
                3.0 = tf(freq=9.0), with freq of:
                  9.0 = termFreq=9.0
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.0625 = fieldNorm(doc=847)
        0.2 = coord(5/25)
    
  5. Watstein, S.: Reference service in a digital age (1998) 0.13
    0.13170801 = sum of:
      0.13170801 = product of:
        0.8231751 = sum of:
          0.07704069 = weight(abstract_txt:service in 5615) [ClassicSimilarity], result of:
            0.07704069 = score(doc=5615,freq=1.0), product of:
              0.13465741 = queryWeight, product of:
                1.5236987 = boost
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.019308623 = queryNorm
              0.57212365 = fieldWeight in 5615, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.576989 = idf(docFreq=1241, maxDocs=44421)
                0.125 = fieldNorm(doc=5615)
          0.18417317 = weight(abstract_txt:digital in 5615) [ClassicSimilarity], result of:
            0.18417317 = score(doc=5615,freq=2.0), product of:
              0.2407508 = queryWeight, product of:
                2.8812625 = boost
                4.3274655 = idf(docFreq=1593, maxDocs=44421)
                0.019308623 = queryNorm
              0.76499504 = fieldWeight in 5615, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.3274655 = idf(docFreq=1593, maxDocs=44421)
                0.125 = fieldNorm(doc=5615)
          0.30972978 = weight(abstract_txt:reference in 5615) [ClassicSimilarity], result of:
            0.30972978 = score(doc=5615,freq=3.0), product of:
              0.3203896 = queryWeight, product of:
                3.7161493 = boost
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.019308623 = queryNorm
              0.9667286 = fieldWeight in 5615, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.4651284 = idf(docFreq=1388, maxDocs=44421)
                0.125 = fieldNorm(doc=5615)
          0.25223145 = weight(abstract_txt:services in 5615) [ClassicSimilarity], result of:
            0.25223145 = score(doc=5615,freq=2.0), product of:
              0.33987045 = queryWeight, product of:
                4.1927724 = boost
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.019308623 = queryNorm
              0.74214 = fieldWeight in 5615, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.198178 = idf(docFreq=1813, maxDocs=44421)
                0.125 = fieldNorm(doc=5615)
        0.16 = coord(4/25)