Document (#1203)

Author

Schabas, A.H.

Title

Postcoordinate retrieval : a comparison of two retrieval languages

Source

Journal of the American Society for Information Science. 33(1982), S.32-37

Year

1982

Abstract

This article reports on a comparison of the postcoordinate retrieval effectiveness of two indexing languages: LCSH and PRECIS. The effect of augmenting each with title words was also studies. The database for the study was over 15.000 UK MARC records. Users returned 5.326 relevant judgements for citations retrieved for 61 SDI profiles, representing a wide variety of subjects. Results are reported in terms of precision and relative recall. Pure/applied sciences data and social science data were analyzed separately. Cochran's significance tests for ratios were used to interpret the findings. Recall emerged as the more important measure discriminating the behavior of the two languages. Addition of title words was found to improve recall of both indexing languages significantly. A direct relationship was observed between recall and exhaustivity. For the social sciences searches, recalls from PRECIS alone and from PRECIS with title words were significantly higher than those from LCSH alone and from LCSH with title words, respectively. Corresponding comparisons for the pure/applied sciences searches revealed no significant differences

Theme

Verbale Doksprachen im Online-Retrieval
Retrievalstudien

Object

PRECIS
LCSH

Similar documents (content)

1. Austin, D.: PRECIS (2009) 0.31

   0.3141351 = sum of:
     0.3141351 = product of:
       2.6177926 = sum of:
         0.04753683 = weight(abstract_txt:indexing in 985) [ClassicSimilarity], result of:
           0.04753683 = score(doc=985,freq=3.0), product of:
             0.08076655 = queryWeight, product of:
               1.0312976 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.018005265 = queryNorm
             0.5885708 = fieldWeight in 985, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.078125 = fieldNorm(doc=985)
         0.024393542 = weight(abstract_txt:from in 985) [ClassicSimilarity], result of:
           0.024393542 = score(doc=985,freq=3.0), product of:
             0.065223575 = queryWeight, product of:
               1.3106463 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.018005265 = queryNorm
             0.37399885 = fieldWeight in 985, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.078125 = fieldNorm(doc=985)
         2.5458622 = weight(title_txt:precis in 985) [ClassicSimilarity], result of:
           2.5458622 = score(doc=985,freq=1.0), product of:
             0.34623063 = queryWeight, product of:
               2.6151497 = boost
               7.3530817 = idf(docFreq=76, maxDocs=44218)
               0.018005265 = queryNorm
             7.3530817 = fieldWeight in 985, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3530817 = idf(docFreq=76, maxDocs=44218)
               1.0 = fieldNorm(doc=985)
       0.12 = coord(3/25)
   

2. Austin, D.; Digger, J.A.: PRECIS: The Preserved Context Index System (1985) 0.28

   0.2789546 = sum of:
     0.2789546 = product of:
       1.1623108 = sum of:
         0.03361362 = weight(abstract_txt:indexing in 3652) [ClassicSimilarity], result of:
           0.03361362 = score(doc=3652,freq=6.0), product of:
             0.08076655 = queryWeight, product of:
               1.0312976 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.018005265 = queryNorm
             0.41618243 = fieldWeight in 3652, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.0390625 = fieldNorm(doc=3652)
         0.02473076 = weight(abstract_txt:were in 3652) [ClassicSimilarity], result of:
           0.02473076 = score(doc=3652,freq=4.0), product of:
             0.08625293 = queryWeight, product of:
               1.3052711 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.018005265 = queryNorm
             0.28672373 = fieldWeight in 3652, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.0390625 = fieldNorm(doc=3652)
         0.014083617 = weight(abstract_txt:from in 3652) [ClassicSimilarity], result of:
           0.014083617 = score(doc=3652,freq=4.0), product of:
             0.065223575 = queryWeight, product of:
               1.3106463 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.018005265 = queryNorm
             0.21592833 = fieldWeight in 3652, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.0390625 = fieldNorm(doc=3652)
         0.046575226 = weight(abstract_txt:languages in 3652) [ClassicSimilarity], result of:
           0.046575226 = score(doc=3652,freq=1.0), product of:
             0.22981855 = queryWeight, product of:
               2.46023 = boost
               5.188118 = idf(docFreq=670, maxDocs=44218)
               0.018005265 = queryNorm
             0.20266086 = fieldWeight in 3652, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.188118 = idf(docFreq=670, maxDocs=44218)
               0.0390625 = fieldNorm(doc=3652)
         0.08860933 = weight(abstract_txt:words in 3652) [ClassicSimilarity], result of:
           0.08860933 = score(doc=3652,freq=3.0), product of:
             0.24465889 = queryWeight, product of:
               2.5384212 = boost
               5.353007 = idf(docFreq=568, maxDocs=44218)
               0.018005265 = queryNorm
             0.362175 = fieldWeight in 3652, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.353007 = idf(docFreq=568, maxDocs=44218)
               0.0390625 = fieldNorm(doc=3652)
         0.9546983 = weight(title_txt:precis in 3652) [ClassicSimilarity], result of:
           0.9546983 = score(doc=3652,freq=1.0), product of:
             0.34623063 = queryWeight, product of:
               2.6151497 = boost
               7.3530817 = idf(docFreq=76, maxDocs=44218)
               0.018005265 = queryNorm
             2.7574058 = fieldWeight in 3652, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3530817 = idf(docFreq=76, maxDocs=44218)
               0.375 = fieldNorm(doc=3652)
       0.24 = coord(6/25)
   

3. Madelung, H.-O.: Subject searching in the social sciences : a comparison of PRECIS and KWIC indexes indexes to newspaper articles (1982) 0.24

   0.23870707 = sum of:
     0.23870707 = product of:
       0.85252523 = sum of:
         0.02502175 = weight(abstract_txt:social in 5517) [ClassicSimilarity], result of:
           0.02502175 = score(doc=5517,freq=1.0), product of:
             0.075938776 = queryWeight, product of:
               4.2175875 = idf(docFreq=1770, maxDocs=44218)
               0.018005265 = queryNorm
             0.329499 = fieldWeight in 5517, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2175875 = idf(docFreq=1770, maxDocs=44218)
               0.078125 = fieldNorm(doc=5517)
         0.020995844 = weight(abstract_txt:retrieval in 5517) [ClassicSimilarity], result of:
           0.020995844 = score(doc=5517,freq=1.0), product of:
             0.07733411 = queryWeight, product of:
               1.2359457 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.018005265 = queryNorm
             0.27149525 = fieldWeight in 5517, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.078125 = fieldNorm(doc=5517)
         0.04764767 = weight(abstract_txt:searches in 5517) [ClassicSimilarity], result of:
           0.04764767 = score(doc=5517,freq=1.0), product of:
             0.11666652 = queryWeight, product of:
               1.2394851 = boost
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.018005265 = queryNorm
             0.40840912 = fieldWeight in 5517, 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=5517)
         0.055299666 = weight(abstract_txt:were in 5517) [ClassicSimilarity], result of:
           0.055299666 = score(doc=5517,freq=5.0), product of:
             0.08625293 = queryWeight, product of:
               1.3052711 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.018005265 = queryNorm
             0.6411338 = fieldWeight in 5517, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.078125 = fieldNorm(doc=5517)
         0.019917244 = weight(abstract_txt:from in 5517) [ClassicSimilarity], result of:
           0.019917244 = score(doc=5517,freq=2.0), product of:
             0.065223575 = queryWeight, product of:
               1.3106463 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.018005265 = queryNorm
             0.30536878 = fieldWeight in 5517, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.078125 = fieldNorm(doc=5517)
         0.55690736 = weight(title_txt:precis in 5517) [ClassicSimilarity], result of:
           0.55690736 = score(doc=5517,freq=1.0), product of:
             0.34623063 = queryWeight, product of:
               2.6151497 = boost
               7.3530817 = idf(docFreq=76, maxDocs=44218)
               0.018005265 = queryNorm
             1.6084867 = fieldWeight in 5517, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3530817 = idf(docFreq=76, maxDocs=44218)
               0.21875 = fieldNorm(doc=5517)
         0.12673567 = weight(abstract_txt:recall in 5517) [ClassicSimilarity], result of:
           0.12673567 = score(doc=5517,freq=1.0), product of:
             0.28218096 = queryWeight, product of:
               2.726133 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.018005265 = queryNorm
             0.44912907 = fieldWeight in 5517, 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=5517)
       0.28 = coord(7/25)
   

4. Voorbij, H.: Title keywords and subject descriptors : a comparison of subject search entries of books in the humanities and social sciences (1998) 0.18

   0.17665951 = sum of:
     0.17665951 = product of:
       0.55206096 = sum of:
         0.017515227 = weight(abstract_txt:social in 4721) [ClassicSimilarity], result of:
           0.017515227 = score(doc=4721,freq=1.0), product of:
             0.075938776 = queryWeight, product of:
               4.2175875 = idf(docFreq=1770, maxDocs=44218)
               0.018005265 = queryNorm
             0.23064932 = fieldWeight in 4721, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2175875 = idf(docFreq=1770, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4721)
         0.047168788 = weight(abstract_txt:searches in 4721) [ClassicSimilarity], result of:
           0.047168788 = score(doc=4721,freq=2.0), product of:
             0.11666652 = queryWeight, product of:
               1.2394851 = boost
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.018005265 = queryNorm
             0.40430441 = fieldWeight in 4721, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4721)
         0.029984454 = weight(abstract_txt:were in 4721) [ClassicSimilarity], result of:
           0.029984454 = score(doc=4721,freq=3.0), product of:
             0.08625293 = queryWeight, product of:
               1.3052711 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.018005265 = queryNorm
             0.34763405 = fieldWeight in 4721, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4721)
         0.01394207 = weight(abstract_txt:from in 4721) [ClassicSimilarity], result of:
           0.01394207 = score(doc=4721,freq=2.0), product of:
             0.065223575 = queryWeight, product of:
               1.3106463 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.018005265 = queryNorm
             0.21375814 = fieldWeight in 4721, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4721)
         0.04162868 = weight(abstract_txt:comparison in 4721) [ClassicSimilarity], result of:
           0.04162868 = score(doc=4721,freq=1.0), product of:
             0.13524303 = queryWeight, product of:
               1.3345217 = boost
               5.628462 = idf(docFreq=431, maxDocs=44218)
               0.018005265 = queryNorm
             0.3078065 = fieldWeight in 4721, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.628462 = idf(docFreq=431, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4721)
         0.050525546 = weight(abstract_txt:sciences in 4721) [ClassicSimilarity], result of:
           0.050525546 = score(doc=4721,freq=1.0), product of:
             0.17615333 = queryWeight, product of:
               1.8653454 = boost
               5.244838 = idf(docFreq=633, maxDocs=44218)
               0.018005265 = queryNorm
             0.2868271 = fieldWeight in 4721, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.244838 = idf(docFreq=633, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4721)
         0.2625812 = weight(abstract_txt:title in 4721) [ClassicSimilarity], result of:
           0.2625812 = score(doc=4721,freq=9.0), product of:
             0.27965635 = queryWeight, product of:
               2.7139106 = boost
               5.723078 = idf(docFreq=392, maxDocs=44218)
               0.018005265 = queryNorm
             0.93894243 = fieldWeight in 4721, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               5.723078 = idf(docFreq=392, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4721)
         0.08871497 = weight(abstract_txt:recall in 4721) [ClassicSimilarity], result of:
           0.08871497 = score(doc=4721,freq=1.0), product of:
             0.28218096 = queryWeight, product of:
               2.726133 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.018005265 = queryNorm
             0.31439036 = fieldWeight in 4721, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4721)
       0.32 = coord(8/25)
   

5. McJunkin, M.C.: Precision and recall in title keyword searching (1995) 0.18

   0.17641209 = sum of:
     0.17641209 = product of:
       0.7350504 = sum of:
         0.04764767 = weight(abstract_txt:searches in 3351) [ClassicSimilarity], result of:
           0.04764767 = score(doc=3351,freq=1.0), product of:
             0.11666652 = queryWeight, product of:
               1.2394851 = boost
               5.227637 = idf(docFreq=644, maxDocs=44218)
               0.018005265 = 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)
         0.04946152 = weight(abstract_txt:were in 3351) [ClassicSimilarity], result of:
           0.04946152 = score(doc=3351,freq=4.0), product of:
             0.08625293 = queryWeight, product of:
               1.3052711 = boost
               3.6700637 = idf(docFreq=3061, maxDocs=44218)
               0.018005265 = 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)
         0.014083617 = weight(abstract_txt:from in 3351) [ClassicSimilarity], result of:
           0.014083617 = score(doc=3351,freq=1.0), product of:
             0.065223575 = queryWeight, product of:
               1.3106463 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.018005265 = queryNorm
             0.21592833 = fieldWeight in 3351, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.12474995 = weight(abstract_txt:lcsh in 3351) [ClassicSimilarity], result of:
           0.12474995 = score(doc=3351,freq=1.0), product of:
             0.25369337 = queryWeight, product of:
               2.238558 = boost
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.018005265 = queryNorm
             0.49173516 = fieldWeight in 3351, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.279595 = weight(abstract_txt:title in 3351) [ClassicSimilarity], result of:
           0.279595 = score(doc=3351,freq=5.0), product of:
             0.27965635 = queryWeight, product of:
               2.7139106 = boost
               5.723078 = idf(docFreq=392, maxDocs=44218)
               0.018005265 = queryNorm
             0.99978054 = fieldWeight in 3351, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.723078 = idf(docFreq=392, maxDocs=44218)
               0.078125 = fieldNorm(doc=3351)
         0.21951264 = weight(abstract_txt:recall in 3351) [ClassicSimilarity], result of:
           0.21951264 = score(doc=3351,freq=3.0), product of:
             0.28218096 = queryWeight, product of:
               2.726133 = boost
               5.7488523 = idf(docFreq=382, maxDocs=44218)
               0.018005265 = 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)
       0.24 = coord(6/25)