Search (7 results, page 1 of 1)

  • × author_ss:"Jansen, B.J."
  • × theme_ss:"Benutzerstudien"
  1. Jansen, B.J.; Spink, A.; Pedersen, J.: ¬A temporal comparison of AItaVista Web searching (2005) 0.02
    0.017030591 = product of:
      0.05109177 = sum of:
        0.045456 = weight(_text_:suchmaschinen in 3454) [ClassicSimilarity], result of:
          0.045456 = score(doc=3454,freq=2.0), product of:
            0.15347718 = queryWeight, product of:
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.03435205 = queryNorm
            0.29617432 = fieldWeight in 3454, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.046875 = fieldNorm(doc=3454)
        0.0056357714 = product of:
          0.028178858 = sum of:
            0.028178858 = weight(_text_:29 in 3454) [ClassicSimilarity], result of:
              0.028178858 = score(doc=3454,freq=2.0), product of:
                0.12083977 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.03435205 = queryNorm
                0.23319192 = fieldWeight in 3454, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.046875 = fieldNorm(doc=3454)
          0.2 = coord(1/5)
      0.33333334 = coord(2/6)
    
    Date
    3. 6.2005 19:29:59
    Theme
    Suchmaschinen
  2. Jansen, B.J.; Pooch , U.: ¬A review of Web searching studies and a framework for future research (2001) 0.01
    0.008838667 = product of:
      0.053032 = sum of:
        0.053032 = weight(_text_:suchmaschinen in 5186) [ClassicSimilarity], result of:
          0.053032 = score(doc=5186,freq=2.0), product of:
            0.15347718 = queryWeight, product of:
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.03435205 = queryNorm
            0.3455367 = fieldWeight in 5186, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.0546875 = fieldNorm(doc=5186)
      0.16666667 = coord(1/6)
    
    Theme
    Suchmaschinen
  3. Spink, A.; Park, M.; Jansen, B.J.; Pedersen, J.: Elicitation and use of relevance feedback information (2006) 0.01
    0.0063133333 = product of:
      0.03788 = sum of:
        0.03788 = weight(_text_:suchmaschinen in 967) [ClassicSimilarity], result of:
          0.03788 = score(doc=967,freq=2.0), product of:
            0.15347718 = queryWeight, product of:
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.03435205 = queryNorm
            0.24681194 = fieldWeight in 967, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.0390625 = fieldNorm(doc=967)
      0.16666667 = coord(1/6)
    
    Theme
    Suchmaschinen
  4. Jansen, B.J.; Spink, A.: How are we searching the World Wide Web? : A comparison of nine search engine transaction logs (2006) 0.01
    0.0063133333 = product of:
      0.03788 = sum of:
        0.03788 = weight(_text_:suchmaschinen in 968) [ClassicSimilarity], result of:
          0.03788 = score(doc=968,freq=2.0), product of:
            0.15347718 = queryWeight, product of:
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.03435205 = queryNorm
            0.24681194 = fieldWeight in 968, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.0390625 = fieldNorm(doc=968)
      0.16666667 = coord(1/6)
    
    Theme
    Suchmaschinen
  5. Spink, A.; Wolfram, D.; Jansen, B.J.; Saracevic, T.: Searching the Web : the public and their queries (2001) 0.01
    0.0050506666 = product of:
      0.030304 = sum of:
        0.030304 = weight(_text_:suchmaschinen in 6980) [ClassicSimilarity], result of:
          0.030304 = score(doc=6980,freq=2.0), product of:
            0.15347718 = queryWeight, product of:
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.03435205 = queryNorm
            0.19744955 = fieldWeight in 6980, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.03125 = fieldNorm(doc=6980)
      0.16666667 = coord(1/6)
    
    Theme
    Suchmaschinen
  6. Spink, A.; Jansen, B.J.; Blakely, C.; Koshman, S.: ¬A study of results overlap and uniqueness among major Web search engines (2006) 0.01
    0.0050506666 = product of:
      0.030304 = sum of:
        0.030304 = weight(_text_:suchmaschinen in 993) [ClassicSimilarity], result of:
          0.030304 = score(doc=993,freq=2.0), product of:
            0.15347718 = queryWeight, product of:
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.03435205 = queryNorm
            0.19744955 = fieldWeight in 993, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.4677734 = idf(docFreq=1378, maxDocs=44218)
              0.03125 = fieldNorm(doc=993)
      0.16666667 = coord(1/6)
    
    Theme
    Suchmaschinen
  7. Jansen, B.J.; Booth, D.L.; Spink, A.: Patterns of query reformulation during Web searching (2009) 0.00
    9.74098E-4 = product of:
      0.005844588 = sum of:
        0.005844588 = product of:
          0.02922294 = sum of:
            0.02922294 = weight(_text_:28 in 2936) [ClassicSimilarity], result of:
              0.02922294 = score(doc=2936,freq=2.0), product of:
                0.12305808 = queryWeight, product of:
                  3.5822632 = idf(docFreq=3342, maxDocs=44218)
                  0.03435205 = queryNorm
                0.23747274 = fieldWeight in 2936, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5822632 = idf(docFreq=3342, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2936)
          0.2 = coord(1/5)
      0.16666667 = coord(1/6)
    
    Abstract
    Query reformulation is a key user behavior during Web search. Our research goal is to develop predictive models of query reformulation during Web searching. This article reports results from a study in which we automatically classified the query-reformulation patterns for 964,780 Web searching sessions, composed of 1,523,072 queries, to predict the next query reformulation. We employed an n-gram modeling approach to describe the probability of users transitioning from one query-reformulation state to another to predict their next state. We developed first-, second-, third-, and fourth-order models and evaluated each model for accuracy of prediction, coverage of the dataset, and complexity of the possible pattern set. The results show that Reformulation and Assistance account for approximately 45% of all query reformulations; furthermore, the results demonstrate that the first- and second-order models provide the best predictability, between 28 and 40% overall and higher than 70% for some patterns. Implications are that the n-gram approach can be used for improving searching systems and searching assistance.