Document (#493)

Author
Cherry, J.M.
Title
Improving subject access in OPACs : an exploratory study of conversion of user queries
Source
Journal of academic librarianship. 18(1992), S.95-99
Year
1992
Abstract
In a study at the University of Toronto libraries, observers recorded protocols for 100 OPAC search sessions. This article reports on the analysis of these protocols, and examines zero-hit subject searches in particular to explore the the effectiveness of various conversions of users' queries to improve recall. Although the number of zero-hit subject searches analyzes was small, this exploratory study yielded some findings that merit consideration in efforts to improve subject access in OPACs.
Theme
OPAC
Benutzerstudien
Location
CAN

Similar documents (author)

  1. Cherry, J.M.: OPACs in twelve Canadian academic libraries : an evaluation of functional capabilities and interface features (1994) 5.87
    5.871439 = sum of:
      5.871439 = weight(author_txt:cherry in 2774) [ClassicSimilarity], result of:
        5.871439 = fieldWeight in 2774, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.394302 = idf(docFreq=9, maxDocs=44218)
          0.625 = fieldNorm(doc=2774)
    
  2. Cherry, J.M.: Bibliographic displays in OPACs and Web catalogs : how well do they comply with display guidelines (1998) 5.87
    5.871439 = sum of:
      5.871439 = weight(author_txt:cherry in 3378) [ClassicSimilarity], result of:
        5.871439 = fieldWeight in 3378, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.394302 = idf(docFreq=9, maxDocs=44218)
          0.625 = fieldNorm(doc=3378)
    
  3. Cherry, J.M.; Clinton, M.: ¬An experimental investigation of two types of instruction for OPAC users (1991) 4.70
    4.697151 = sum of:
      4.697151 = weight(author_txt:cherry in 3098) [ClassicSimilarity], result of:
        4.697151 = fieldWeight in 3098, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.394302 = idf(docFreq=9, maxDocs=44218)
          0.5 = fieldNorm(doc=3098)
    
  4. Cherry, J.M.; Clinton, M.: OPACs at five Ontario universities : a profile of users and user satisfaction (1992) 4.70
    4.697151 = sum of:
      4.697151 = weight(author_txt:cherry in 3631) [ClassicSimilarity], result of:
        4.697151 = fieldWeight in 3631, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.394302 = idf(docFreq=9, maxDocs=44218)
          0.5 = fieldNorm(doc=3631)
    
  5. Kopak, R.W.; Cherry, J.M.: Bibliographic displays and Web catalogues : user evaluations of three prototype displays (1998) 4.70
    4.697151 = sum of:
      4.697151 = weight(author_txt:cherry in 3379) [ClassicSimilarity], result of:
        4.697151 = fieldWeight in 3379, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.394302 = idf(docFreq=9, maxDocs=44218)
          0.5 = fieldNorm(doc=3379)
    

Similar documents (content)

  1. Beheshti, J.: ¬The evolving OPAC (1997) 0.16
    0.15934502 = sum of:
      0.15934502 = product of:
        0.66393757 = sum of:
          0.0731447 = weight(abstract_txt:opac in 5612) [ClassicSimilarity], result of:
            0.0731447 = score(doc=5612,freq=2.0), product of:
              0.09966108 = queryWeight, product of:
                1.037166 = boost
                5.53568 = idf(docFreq=473, maxDocs=44218)
                0.017358268 = queryNorm
              0.7339344 = fieldWeight in 5612, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.53568 = idf(docFreq=473, maxDocs=44218)
                0.09375 = fieldNorm(doc=5612)
          0.0812039 = weight(abstract_txt:queries in 5612) [ClassicSimilarity], result of:
            0.0812039 = score(doc=5612,freq=1.0), product of:
              0.16961919 = queryWeight, product of:
                1.9135418 = boost
                5.106586 = idf(docFreq=727, maxDocs=44218)
                0.017358268 = queryNorm
              0.47874242 = fieldWeight in 5612, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.106586 = idf(docFreq=727, maxDocs=44218)
                0.09375 = fieldNorm(doc=5612)
          0.036711626 = weight(abstract_txt:study in 5612) [ClassicSimilarity], result of:
            0.036711626 = score(doc=5612,freq=1.0), product of:
              0.11437292 = queryWeight, product of:
                1.9244547 = boost
                3.423806 = idf(docFreq=3916, maxDocs=44218)
                0.017358268 = queryNorm
              0.3209818 = fieldWeight in 5612, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.423806 = idf(docFreq=3916, maxDocs=44218)
                0.09375 = fieldNorm(doc=5612)
          0.08711665 = weight(abstract_txt:searches in 5612) [ClassicSimilarity], result of:
            0.08711665 = score(doc=5612,freq=1.0), product of:
              0.17775609 = queryWeight, product of:
                1.958902 = boost
                5.227637 = idf(docFreq=644, maxDocs=44218)
                0.017358268 = queryNorm
              0.49009097 = fieldWeight in 5612, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.227637 = idf(docFreq=644, maxDocs=44218)
                0.09375 = fieldNorm(doc=5612)
          0.17610358 = weight(abstract_txt:opacs in 5612) [ClassicSimilarity], result of:
            0.17610358 = score(doc=5612,freq=2.0), product of:
              0.22555847 = queryWeight, product of:
                2.2066326 = boost
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.017358268 = queryNorm
              0.7807447 = fieldWeight in 5612, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.09375 = fieldNorm(doc=5612)
          0.20965716 = weight(abstract_txt:protocols in 5612) [ClassicSimilarity], result of:
            0.20965716 = score(doc=5612,freq=1.0), product of:
              0.31922495 = queryWeight, product of:
                2.6251183 = boost
                7.0055394 = idf(docFreq=108, maxDocs=44218)
                0.017358268 = queryNorm
              0.65676934 = fieldWeight in 5612, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.0055394 = idf(docFreq=108, maxDocs=44218)
                0.09375 = fieldNorm(doc=5612)
        0.24 = coord(6/25)
    
  2. Lee, Y.-R.: ¬A study on the conditions of using OPAC access points and subject searching by users (1997) 0.15
    0.1509628 = sum of:
      0.1509628 = product of:
        0.6290117 = sum of:
          0.06181043 = weight(abstract_txt:explore in 933) [ClassicSimilarity], result of:
            0.06181043 = score(doc=933,freq=1.0), product of:
              0.09264651 = queryWeight, product of:
                5.337313 = idf(docFreq=577, maxDocs=44218)
                0.017358268 = queryNorm
              0.66716415 = fieldWeight in 933, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.337313 = idf(docFreq=577, maxDocs=44218)
                0.125 = fieldNorm(doc=933)
          0.06896148 = weight(abstract_txt:opac in 933) [ClassicSimilarity], result of:
            0.06896148 = score(doc=933,freq=1.0), product of:
              0.09966108 = queryWeight, product of:
                1.037166 = boost
                5.53568 = idf(docFreq=473, maxDocs=44218)
                0.017358268 = queryNorm
              0.69196 = fieldWeight in 933, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.53568 = idf(docFreq=473, maxDocs=44218)
                0.125 = fieldNorm(doc=933)
          0.055958565 = weight(abstract_txt:access in 933) [ClassicSimilarity], result of:
            0.055958565 = score(doc=933,freq=2.0), product of:
              0.08670263 = queryWeight, product of:
                1.3680961 = boost
                3.6509786 = idf(docFreq=3120, maxDocs=44218)
                0.017358268 = queryNorm
              0.6454079 = fieldWeight in 933, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.6509786 = idf(docFreq=3120, maxDocs=44218)
                0.125 = fieldNorm(doc=933)
          0.10827187 = weight(abstract_txt:queries in 933) [ClassicSimilarity], result of:
            0.10827187 = score(doc=933,freq=1.0), product of:
              0.16961919 = queryWeight, product of:
                1.9135418 = boost
                5.106586 = idf(docFreq=727, maxDocs=44218)
                0.017358268 = queryNorm
              0.63832325 = fieldWeight in 933, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.106586 = idf(docFreq=727, maxDocs=44218)
                0.125 = fieldNorm(doc=933)
          0.16603203 = weight(abstract_txt:opacs in 933) [ClassicSimilarity], result of:
            0.16603203 = score(doc=933,freq=1.0), product of:
              0.22555847 = queryWeight, product of:
                2.2066326 = boost
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.017358268 = queryNorm
              0.7360931 = fieldWeight in 933, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.125 = fieldNorm(doc=933)
          0.16797735 = weight(abstract_txt:subject in 933) [ClassicSimilarity], result of:
            0.16797735 = score(doc=933,freq=3.0), product of:
              0.1985796 = queryWeight, product of:
                2.928079 = boost
                3.9070187 = idf(docFreq=2415, maxDocs=44218)
                0.017358268 = queryNorm
              0.84589434 = fieldWeight in 933, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.9070187 = idf(docFreq=2415, maxDocs=44218)
                0.125 = fieldNorm(doc=933)
        0.24 = coord(6/25)
    
  3. Witt, M.: Survey on the use of the catalogue at the médiathèque of the cité des sciences et de l'industrie (CSI) (1993) 0.14
    0.14156407 = sum of:
      0.14156407 = product of:
        0.5898503 = sum of:
          0.083037116 = weight(abstract_txt:recorded in 6233) [ClassicSimilarity], result of:
            0.083037116 = score(doc=6233,freq=1.0), product of:
              0.13664547 = queryWeight, product of:
                1.2144597 = boost
                6.481951 = idf(docFreq=183, maxDocs=44218)
                0.017358268 = queryNorm
              0.60768294 = fieldWeight in 6233, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.481951 = idf(docFreq=183, maxDocs=44218)
                0.09375 = fieldNorm(doc=6233)
          0.09196741 = weight(abstract_txt:sessions in 6233) [ClassicSimilarity], result of:
            0.09196741 = score(doc=6233,freq=1.0), product of:
              0.14627486 = queryWeight, product of:
                1.2565227 = boost
                6.7064548 = idf(docFreq=146, maxDocs=44218)
                0.017358268 = queryNorm
              0.6287301 = fieldWeight in 6233, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.7064548 = idf(docFreq=146, maxDocs=44218)
                0.09375 = fieldNorm(doc=6233)
          0.036711626 = weight(abstract_txt:study in 6233) [ClassicSimilarity], result of:
            0.036711626 = score(doc=6233,freq=1.0), product of:
              0.11437292 = queryWeight, product of:
                1.9244547 = boost
                3.423806 = idf(docFreq=3916, maxDocs=44218)
                0.017358268 = queryNorm
              0.3209818 = fieldWeight in 6233, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.423806 = idf(docFreq=3916, maxDocs=44218)
                0.09375 = fieldNorm(doc=6233)
          0.08711665 = weight(abstract_txt:searches in 6233) [ClassicSimilarity], result of:
            0.08711665 = score(doc=6233,freq=1.0), product of:
              0.17775609 = queryWeight, product of:
                1.958902 = boost
                5.227637 = idf(docFreq=644, maxDocs=44218)
                0.017358268 = queryNorm
              0.49009097 = fieldWeight in 6233, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.227637 = idf(docFreq=644, maxDocs=44218)
                0.09375 = fieldNorm(doc=6233)
          0.124524035 = weight(abstract_txt:opacs in 6233) [ClassicSimilarity], result of:
            0.124524035 = score(doc=6233,freq=1.0), product of:
              0.22555847 = queryWeight, product of:
                2.2066326 = boost
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.017358268 = queryNorm
              0.55206984 = fieldWeight in 6233, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.09375 = fieldNorm(doc=6233)
          0.16649348 = weight(abstract_txt:exploratory in 6233) [ClassicSimilarity], result of:
            0.16649348 = score(doc=6233,freq=1.0), product of:
              0.27375066 = queryWeight, product of:
                2.4309614 = boost
                6.487401 = idf(docFreq=182, maxDocs=44218)
                0.017358268 = queryNorm
              0.6081939 = fieldWeight in 6233, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.487401 = idf(docFreq=182, maxDocs=44218)
                0.09375 = fieldNorm(doc=6233)
        0.24 = coord(6/25)
    
  4. Slack, F.: Subject searching on OPACs : problems and help provision (1991) 0.13
    0.12784337 = sum of:
      0.12784337 = product of:
        0.6392168 = sum of:
          0.060341295 = weight(abstract_txt:opac in 4904) [ClassicSimilarity], result of:
            0.060341295 = score(doc=4904,freq=1.0), product of:
              0.09966108 = queryWeight, product of:
                1.037166 = boost
                5.53568 = idf(docFreq=473, maxDocs=44218)
                0.017358268 = queryNorm
              0.605465 = fieldWeight in 4904, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.53568 = idf(docFreq=473, maxDocs=44218)
                0.109375 = fieldNorm(doc=4904)
          0.059968095 = weight(abstract_txt:access in 4904) [ClassicSimilarity], result of:
            0.059968095 = score(doc=4904,freq=3.0), product of:
              0.08670263 = queryWeight, product of:
                1.3680961 = boost
                3.6509786 = idf(docFreq=3120, maxDocs=44218)
                0.017358268 = queryNorm
              0.69165254 = fieldWeight in 4904, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.6509786 = idf(docFreq=3120, maxDocs=44218)
                0.109375 = fieldNorm(doc=4904)
          0.14373514 = weight(abstract_txt:searches in 4904) [ClassicSimilarity], result of:
            0.14373514 = score(doc=4904,freq=2.0), product of:
              0.17775609 = queryWeight, product of:
                1.958902 = boost
                5.227637 = idf(docFreq=644, maxDocs=44218)
                0.017358268 = queryNorm
              0.80860883 = fieldWeight in 4904, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.227637 = idf(docFreq=644, maxDocs=44218)
                0.109375 = fieldNorm(doc=4904)
          0.20545417 = weight(abstract_txt:opacs in 4904) [ClassicSimilarity], result of:
            0.20545417 = score(doc=4904,freq=2.0), product of:
              0.22555847 = queryWeight, product of:
                2.2066326 = boost
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.017358268 = queryNorm
              0.91086876 = fieldWeight in 4904, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.109375 = fieldNorm(doc=4904)
          0.1697181 = weight(abstract_txt:subject in 4904) [ClassicSimilarity], result of:
            0.1697181 = score(doc=4904,freq=4.0), product of:
              0.1985796 = queryWeight, product of:
                2.928079 = boost
                3.9070187 = idf(docFreq=2415, maxDocs=44218)
                0.017358268 = queryNorm
              0.85466033 = fieldWeight in 4904, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.9070187 = idf(docFreq=2415, maxDocs=44218)
                0.109375 = fieldNorm(doc=4904)
        0.2 = coord(5/25)
    
  5. Long, C.E.: Improving subject searching in Web-based OPACs : evaluation of the problem and guidelines for design (2000) 0.13
    0.1275582 = sum of:
      0.1275582 = product of:
        0.53149253 = sum of:
          0.06095391 = weight(abstract_txt:opac in 6110) [ClassicSimilarity], result of:
            0.06095391 = score(doc=6110,freq=2.0), product of:
              0.09966108 = queryWeight, product of:
                1.037166 = boost
                5.53568 = idf(docFreq=473, maxDocs=44218)
                0.017358268 = queryNorm
              0.61161196 = fieldWeight in 6110, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.53568 = idf(docFreq=473, maxDocs=44218)
                0.078125 = fieldNorm(doc=6110)
          0.034974102 = weight(abstract_txt:access in 6110) [ClassicSimilarity], result of:
            0.034974102 = score(doc=6110,freq=2.0), product of:
              0.08670263 = queryWeight, product of:
                1.3680961 = boost
                3.6509786 = idf(docFreq=3120, maxDocs=44218)
                0.017358268 = queryNorm
              0.40337995 = fieldWeight in 6110, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.6509786 = idf(docFreq=3120, maxDocs=44218)
                0.078125 = fieldNorm(doc=6110)
          0.06200516 = weight(abstract_txt:improve in 6110) [ClassicSimilarity], result of:
            0.06200516 = score(doc=6110,freq=1.0), product of:
              0.16001588 = queryWeight, product of:
                1.8585832 = boost
                4.9599204 = idf(docFreq=842, maxDocs=44218)
                0.017358268 = queryNorm
              0.3874938 = fieldWeight in 6110, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9599204 = idf(docFreq=842, maxDocs=44218)
                0.078125 = fieldNorm(doc=6110)
          0.072597206 = weight(abstract_txt:searches in 6110) [ClassicSimilarity], result of:
            0.072597206 = score(doc=6110,freq=1.0), product of:
              0.17775609 = queryWeight, product of:
                1.958902 = boost
                5.227637 = idf(docFreq=644, maxDocs=44218)
                0.017358268 = queryNorm
              0.40840912 = fieldWeight in 6110, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.227637 = idf(docFreq=644, maxDocs=44218)
                0.078125 = fieldNorm(doc=6110)
          0.17973495 = weight(abstract_txt:opacs in 6110) [ClassicSimilarity], result of:
            0.17973495 = score(doc=6110,freq=3.0), product of:
              0.22555847 = queryWeight, product of:
                2.2066326 = boost
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.017358268 = queryNorm
              0.7968441 = fieldWeight in 6110, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.888745 = idf(docFreq=332, maxDocs=44218)
                0.078125 = fieldNorm(doc=6110)
          0.12122721 = weight(abstract_txt:subject in 6110) [ClassicSimilarity], result of:
            0.12122721 = score(doc=6110,freq=4.0), product of:
              0.1985796 = queryWeight, product of:
                2.928079 = boost
                3.9070187 = idf(docFreq=2415, maxDocs=44218)
                0.017358268 = queryNorm
              0.61047167 = fieldWeight in 6110, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.9070187 = idf(docFreq=2415, maxDocs=44218)
                0.078125 = fieldNorm(doc=6110)
        0.24 = coord(6/25)