Document (#13220)

Author

Bellardo, T.
Saracevic, T.

Title

Online searching and search output : relationships between overlap, relevance, recall and precision

Source

Proceedings of the 50th Annual Meeting of the American Society for Information Science 1987. Ed.: C. Chen

Imprint

Medford, NJ : Learned Information

Year

1987

Pages

S.11-13

Abstract

A recent study begun at Case Western Reserve University and continued at Rutgers University compared the transcripts of 200 DIALOG searches conducted by 36 experienced searchers on real questions submitted by academic and industrial researchers. Relevance judgements by the researchers were used to give recall and precision scores to each search result. Findings included: a low degree of overlap between searches on the same question in selection of search terms or items retrieved; the more often an item was retrieved by different searchers, the more likely it was to be judged relevant; recall and precision were not necessarly inversly related; there was a significant positive impact on recall/precision from using more cycles (a sequence from selecting terms to displaying results); serious uncorrectd errors were a major problem in poor searches and proper selection of terms a key to successful searches.

Theme

Retrievalstudien

Aid

DIALOG

Similar documents (author)

1. Saracevic, T.: ¬The concept of 'relevance' in information science : a historical review (1970) 5.01

   5.005005 = sum of:
     5.005005 = weight(author_txt:saracevic in 2010) [ClassicSimilarity], result of:
       5.005005 = fieldWeight in 2010, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.008008 = idf(docFreq=39, maxDocs=44218)
         0.625 = fieldNorm(doc=2010)
   

2. Saracevic, T.: Information retrieval (1985) 5.01

   5.005005 = sum of:
     5.005005 = weight(author_txt:saracevic in 3302) [ClassicSimilarity], result of:
       5.005005 = fieldWeight in 3302, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.008008 = idf(docFreq=39, maxDocs=44218)
         0.625 = fieldNorm(doc=3302)
   

3. Saracevic, T.: Individual differences in organizing, searching and retrieving information (1991) 5.01

   5.005005 = sum of:
     5.005005 = weight(author_txt:saracevic in 3692) [ClassicSimilarity], result of:
       5.005005 = fieldWeight in 3692, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.008008 = idf(docFreq=39, maxDocs=44218)
         0.625 = fieldNorm(doc=3692)
   

4. Saracevic, T.: Charting the future of information science (1990) 5.01

   5.005005 = sum of:
     5.005005 = weight(author_txt:saracevic in 4078) [ClassicSimilarity], result of:
       5.005005 = fieldWeight in 4078, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.008008 = idf(docFreq=39, maxDocs=44218)
         0.625 = fieldNorm(doc=4078)
   

5. Saracevic, T: Ten years of relevance experimentation : a summary and sythesis of conclusions (1970) 5.01

   5.005005 = sum of:
     5.005005 = weight(author_txt:saracevic in 5359) [ClassicSimilarity], result of:
       5.005005 = fieldWeight in 5359, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.008008 = idf(docFreq=39, maxDocs=44218)
         0.625 = fieldNorm(doc=5359)
   

Similar documents (content)

1. Woods, F.; Walsh, C.; Ford, N.: Effects of postings information on user searching behaviour (1994) 0.38

   0.3831728 = sum of:
     0.3831728 = product of:
       0.957932 = sum of:
         0.034884024 = weight(abstract_txt:university in 940) [ClassicSimilarity], result of:
           0.034884024 = score(doc=940,freq=1.0), product of:
             0.104693085 = queryWeight, product of:
               1.2269915 = boost
               4.264995 = idf(docFreq=1688, maxDocs=44218)
               0.020005891 = queryNorm
             0.33320275 = fieldWeight in 940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.264995 = idf(docFreq=1688, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.03755898 = weight(abstract_txt:more in 940) [ClassicSimilarity], result of:
           0.03755898 = score(doc=940,freq=2.0), product of:
             0.099922486 = queryWeight, product of:
               1.4681141 = boost
               3.402088 = idf(docFreq=4002, maxDocs=44218)
               0.020005891 = queryNorm
             0.37588117 = fieldWeight in 940, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.402088 = idf(docFreq=4002, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.033015054 = weight(abstract_txt:search in 940) [ClassicSimilarity], result of:
           0.033015054 = score(doc=940,freq=1.0), product of:
             0.11552395 = queryWeight, product of:
               1.5785713 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.020005891 = queryNorm
             0.28578535 = fieldWeight in 940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.04715177 = weight(abstract_txt:were in 940) [ClassicSimilarity], result of:
           0.04715177 = score(doc=940,freq=2.0), product of:
             0.11628384 = queryWeight, product of:
               1.5837545 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.020005891 = queryNorm
             0.40548858 = fieldWeight in 940, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.08361918 = weight(abstract_txt:retrieved in 940) [ClassicSimilarity], result of:
           0.08361918 = score(doc=940,freq=1.0), product of:
             0.18751566 = queryWeight, product of:
               1.6421065 = boost
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.020005891 = queryNorm
             0.4459317 = fieldWeight in 940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.09760573 = weight(abstract_txt:searchers in 940) [ClassicSimilarity], result of:
           0.09760573 = score(doc=940,freq=1.0), product of:
             0.20788212 = queryWeight, product of:
               1.7289846 = boost
               6.009912 = idf(docFreq=294, maxDocs=44218)
               0.020005891 = queryNorm
             0.46952438 = fieldWeight in 940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.009912 = idf(docFreq=294, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.04460183 = weight(abstract_txt:terms in 940) [ClassicSimilarity], result of:
           0.04460183 = score(doc=940,freq=1.0), product of:
             0.14117761 = queryWeight, product of:
               1.745063 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.020005891 = queryNorm
             0.3159271 = fieldWeight in 940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.25694916 = weight(abstract_txt:searches in 940) [ClassicSimilarity], result of:
           0.25694916 = score(doc=940,freq=4.0), product of:
             0.31457323 = queryWeight, product of:
               3.0078657 = boost
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.020005891 = queryNorm
             0.81681824 = fieldWeight in 940, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.1516847 = weight(abstract_txt:precision in 940) [ClassicSimilarity], result of:
           0.1516847 = score(doc=940,freq=1.0), product of:
             0.35140246 = queryWeight, product of:
               3.179069 = boost
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.020005891 = queryNorm
             0.4316552 = fieldWeight in 940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
         0.17086156 = weight(abstract_txt:recall in 940) [ClassicSimilarity], result of:
           0.17086156 = score(doc=940,freq=1.0), product of:
             0.38042864 = queryWeight, product of:
               3.3077614 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.020005891 = queryNorm
             0.44912907 = fieldWeight in 940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.078125 = fieldNorm(doc=940)
       0.4 = coord(10/25)
   

2. Kekäläinen, J.; Järvelin, K.: Using graded relevance assessments in IR evaluation (2002) 0.34

   0.33671442 = sum of:
     0.33671442 = product of:
       0.93531775 = sum of:
         0.11416659 = weight(abstract_txt:relevance in 5225) [ClassicSimilarity], result of:
           0.11416659 = score(doc=5225,freq=7.0), product of:
             0.13999106 = queryWeight, product of:
               1.4188377 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.020005891 = queryNorm
             0.8155277 = fieldWeight in 5225, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
         0.021246567 = weight(abstract_txt:more in 5225) [ClassicSimilarity], result of:
           0.021246567 = score(doc=5225,freq=1.0), product of:
             0.099922486 = queryWeight, product of:
               1.4681141 = boost
               3.402088 = idf(docFreq=4002, maxDocs=44218)
               0.020005891 = queryNorm
             0.2126305 = fieldWeight in 5225, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.402088 = idf(docFreq=4002, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
         0.026412042 = weight(abstract_txt:search in 5225) [ClassicSimilarity], result of:
           0.026412042 = score(doc=5225,freq=1.0), product of:
             0.11552395 = queryWeight, product of:
               1.5785713 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.020005891 = queryNorm
             0.22862828 = fieldWeight in 5225, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
         0.04619911 = weight(abstract_txt:were in 5225) [ClassicSimilarity], result of:
           0.04619911 = score(doc=5225,freq=3.0), product of:
             0.11628384 = queryWeight, product of:
               1.5837545 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.020005891 = queryNorm
             0.39729604 = fieldWeight in 5225, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
         0.09460429 = weight(abstract_txt:retrieved in 5225) [ClassicSimilarity], result of:
           0.09460429 = score(doc=5225,freq=2.0), product of:
             0.18751566 = queryWeight, product of:
               1.6421065 = boost
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.020005891 = queryNorm
             0.5045141 = fieldWeight in 5225, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
         0.05046121 = weight(abstract_txt:terms in 5225) [ClassicSimilarity], result of:
           0.05046121 = score(doc=5225,freq=2.0), product of:
             0.14117761 = queryWeight, product of:
               1.745063 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.020005891 = queryNorm
             0.3574307 = fieldWeight in 5225, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
         0.102779664 = weight(abstract_txt:searches in 5225) [ClassicSimilarity], result of:
           0.102779664 = score(doc=5225,freq=1.0), product of:
             0.31457323 = queryWeight, product of:
               3.0078657 = boost
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.020005891 = queryNorm
             0.3267273 = fieldWeight in 5225, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
         0.24269553 = weight(abstract_txt:precision in 5225) [ClassicSimilarity], result of:
           0.24269553 = score(doc=5225,freq=4.0), product of:
             0.35140246 = queryWeight, product of:
               3.179069 = boost
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.020005891 = queryNorm
             0.6906483 = fieldWeight in 5225, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
         0.23675273 = weight(abstract_txt:recall in 5225) [ClassicSimilarity], result of:
           0.23675273 = score(doc=5225,freq=3.0), product of:
             0.38042864 = queryWeight, product of:
               3.3077614 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.020005891 = queryNorm
             0.6223315 = fieldWeight in 5225, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.0625 = fieldNorm(doc=5225)
       0.36 = coord(9/25)
   

3. Bar-Ilan, J.: On the overlap, the precision and estimated recall of search engines : a case study of the query 'Erdös' (1998) 0.33

   0.32943764 = sum of:
     0.32943764 = product of:
       1.176563 = sum of:
         0.07923613 = weight(abstract_txt:search in 3753) [ClassicSimilarity], result of:
           0.07923613 = score(doc=3753,freq=4.0), product of:
             0.11552395 = queryWeight, product of:
               1.5785713 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.020005891 = queryNorm
             0.68588483 = fieldWeight in 3753, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.040009603 = weight(abstract_txt:were in 3753) [ClassicSimilarity], result of:
           0.040009603 = score(doc=3753,freq=1.0), product of:
             0.11628384 = queryWeight, product of:
               1.5837545 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.020005891 = queryNorm
             0.34406847 = fieldWeight in 3753, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.10034301 = weight(abstract_txt:retrieved in 3753) [ClassicSimilarity], result of:
           0.10034301 = score(doc=3753,freq=1.0), product of:
             0.18751566 = queryWeight, product of:
               1.6421065 = boost
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.020005891 = queryNorm
             0.53511804 = fieldWeight in 3753, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.2554256 = weight(abstract_txt:overlap in 3753) [ClassicSimilarity], result of:
           0.2554256 = score(doc=3753,freq=2.0), product of:
             0.2774677 = queryWeight, product of:
               1.9975091 = boost
               6.943297 = idf(docFreq=115, maxDocs=44218)
               0.020005891 = queryNorm
             0.92055976 = fieldWeight in 3753, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.943297 = idf(docFreq=115, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.1541695 = weight(abstract_txt:searches in 3753) [ClassicSimilarity], result of:
           0.1541695 = score(doc=3753,freq=1.0), product of:
             0.31457323 = queryWeight, product of:
               3.0078657 = boost
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.020005891 = queryNorm
             0.49009097 = fieldWeight in 3753, 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=3753)
         0.25741747 = weight(abstract_txt:precision in 3753) [ClassicSimilarity], result of:
           0.25741747 = score(doc=3753,freq=2.0), product of:
             0.35140246 = queryWeight, product of:
               3.179069 = boost
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.020005891 = queryNorm
             0.7325432 = fieldWeight in 3753, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
         0.28996173 = weight(abstract_txt:recall in 3753) [ClassicSimilarity], result of:
           0.28996173 = score(doc=3753,freq=2.0), product of:
             0.38042864 = queryWeight, product of:
               3.3077614 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.020005891 = queryNorm
             0.7621974 = fieldWeight in 3753, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.09375 = fieldNorm(doc=3753)
       0.28 = coord(7/25)
   

4. McJunkin, M.C.: Precision and recall in title keyword searching (1995) 0.31

   0.3144556 = sum of:
     0.3144556 = product of:
       0.98267376 = sum of:
         0.053938646 = weight(abstract_txt:relevance in 3351) [ClassicSimilarity], result of:
           0.053938646 = score(doc=3351,freq=1.0), product of:
             0.13999106 = queryWeight, product of:
               1.4188377 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.020005891 = queryNorm
             0.38530064 = fieldWeight in 3351, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.046690334 = weight(abstract_txt:search in 3351) [ClassicSimilarity], result of:
           0.046690334 = score(doc=3351,freq=2.0), product of:
             0.11552395 = queryWeight, product of:
               1.5785713 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.020005891 = queryNorm
             0.4041615 = fieldWeight in 3351, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.066682674 = weight(abstract_txt:were in 3351) [ClassicSimilarity], result of:
           0.066682674 = score(doc=3351,freq=4.0), product of:
             0.11628384 = queryWeight, product of:
               1.5837545 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.020005891 = queryNorm
             0.57344747 = fieldWeight in 3351, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.08361918 = weight(abstract_txt:retrieved in 3351) [ClassicSimilarity], result of:
           0.08361918 = score(doc=3351,freq=1.0), product of:
             0.18751566 = queryWeight, product of:
               1.6421065 = boost
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.020005891 = queryNorm
             0.4459317 = fieldWeight in 3351, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.04460183 = weight(abstract_txt:terms in 3351) [ClassicSimilarity], result of:
           0.04460183 = score(doc=3351,freq=1.0), product of:
             0.14117761 = queryWeight, product of:
               1.745063 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.020005891 = queryNorm
             0.3159271 = fieldWeight in 3351, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.12847458 = weight(abstract_txt:searches in 3351) [ClassicSimilarity], result of:
           0.12847458 = score(doc=3351,freq=1.0), product of:
             0.31457323 = queryWeight, product of:
               3.0078657 = boost
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.020005891 = queryNorm
             0.40840912 = fieldWeight in 3351, 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=3351)
         0.2627256 = weight(abstract_txt:precision in 3351) [ClassicSimilarity], result of:
           0.2627256 = score(doc=3351,freq=3.0), product of:
             0.35140246 = queryWeight, product of:
               3.179069 = boost
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.020005891 = queryNorm
             0.7476487 = fieldWeight in 3351, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.2959409 = weight(abstract_txt:recall in 3351) [ClassicSimilarity], result of:
           0.2959409 = score(doc=3351,freq=3.0), product of:
             0.38042864 = queryWeight, product of:
               3.3077614 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.020005891 = queryNorm
             0.7779144 = fieldWeight in 3351, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
       0.32 = coord(8/25)
   

5. Saracevic, T.; Kantor, P.: Online searching : still an imprecise art (1991) 0.31

   0.30523512 = sum of:
     0.30523512 = product of:
       1.271813 = sum of:
         0.10787729 = weight(abstract_txt:relevance in 4843) [ClassicSimilarity], result of:
           0.10787729 = score(doc=4843,freq=1.0), product of:
             0.13999106 = queryWeight, product of:
               1.4188377 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.020005891 = queryNorm
             0.7706013 = fieldWeight in 4843, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.15625 = fieldNorm(doc=4843)
         0.066682674 = weight(abstract_txt:were in 4843) [ClassicSimilarity], result of:
           0.066682674 = score(doc=4843,freq=1.0), product of:
             0.11628384 = queryWeight, product of:
               1.5837545 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.020005891 = queryNorm
             0.57344747 = fieldWeight in 4843, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.15625 = fieldNorm(doc=4843)
         0.19521146 = weight(abstract_txt:searchers in 4843) [ClassicSimilarity], result of:
           0.19521146 = score(doc=4843,freq=1.0), product of:
             0.20788212 = queryWeight, product of:
               1.7289846 = boost
               6.009912 = idf(docFreq=294, maxDocs=44218)
               0.020005891 = queryNorm
             0.93904877 = fieldWeight in 4843, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.009912 = idf(docFreq=294, maxDocs=44218)
               0.15625 = fieldNorm(doc=4843)
         0.25694916 = weight(abstract_txt:searches in 4843) [ClassicSimilarity], result of:
           0.25694916 = score(doc=4843,freq=1.0), product of:
             0.31457323 = queryWeight, product of:
               3.0078657 = boost
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.020005891 = queryNorm
             0.81681824 = fieldWeight in 4843, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.15625 = fieldNorm(doc=4843)
         0.3033694 = weight(abstract_txt:precision in 4843) [ClassicSimilarity], result of:
           0.3033694 = score(doc=4843,freq=1.0), product of:
             0.35140246 = queryWeight, product of:
               3.179069 = boost
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.020005891 = queryNorm
             0.8633104 = fieldWeight in 4843, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5251865 = idf(docFreq=478, maxDocs=44218)
               0.15625 = fieldNorm(doc=4843)
         0.3417231 = weight(abstract_txt:recall in 4843) [ClassicSimilarity], result of:
           0.3417231 = score(doc=4843,freq=1.0), product of:
             0.38042864 = queryWeight, product of:
               3.3077614 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.020005891 = queryNorm
             0.89825815 = fieldWeight in 4843, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.15625 = fieldNorm(doc=4843)
       0.24 = coord(6/25)