Search (5 results, page 1 of 1)

Schabas, A.H.: Postcoordinate retrieval : a comparison of two retrieval languages (1982) 0.04
```
0.039762277 = product of:
  0.079524554 = sum of:
    0.079524554 = product of:
      0.23857366 = sum of:
        0.23857366 = weight(_text_:lcsh in 1202) [ClassicSimilarity], result of:
          0.23857366 = score(doc=1202,freq=8.0), product of:
            0.33221418 = queryWeight, product of:
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.06133383 = queryNorm
            0.7181321 = fieldWeight in 1202, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.046875 = fieldNorm(doc=1202)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
```
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

Object

LCSH

Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.03

0.029084606 = product of:
  0.058169212 = sum of:
    0.058169212 = product of:
      0.116338424 = sum of:
        0.116338424 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
          0.116338424 = score(doc=262,freq=2.0), product of:
            0.21478063 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.06133383 = queryNorm
            0.5416616 = fieldWeight in 262, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=262)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date: 20.10.2000 12:22:23

Saracevic, T.: On a method for studying the structure and nature of requests in information retrieval (1983) 0.02

0.020774718 = product of:
  0.041549437 = sum of:
    0.041549437 = product of:
      0.08309887 = sum of:
        0.08309887 = weight(_text_:22 in 2417) [ClassicSimilarity], result of:
          0.08309887 = score(doc=2417,freq=2.0), product of:
            0.21478063 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.06133383 = queryNorm
            0.38690117 = fieldWeight in 2417, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=2417)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Pages: S.22-25

Hodges, P.R.: Keyword in title indexes : effectiveness of retrieval in computer searches (1983) 0.01

0.014542303 = product of:
  0.029084606 = sum of:
    0.029084606 = product of:
      0.058169212 = sum of:
        0.058169212 = weight(_text_:22 in 5001) [ClassicSimilarity], result of:
          0.058169212 = score(doc=5001,freq=2.0), product of:
            0.21478063 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.06133383 = queryNorm
            0.2708308 = fieldWeight in 5001, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=5001)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date: 14. 3.1996 13:22:21

Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989) 0.01

0.012464831 = product of:
  0.024929661 = sum of:
    0.024929661 = product of:
      0.049859323 = sum of:
        0.049859323 = weight(_text_:22 in 3564) [ClassicSimilarity], result of:
          0.049859323 = score(doc=3564,freq=2.0), product of:
            0.21478063 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.06133383 = queryNorm
            0.23214069 = fieldWeight in 3564, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=3564)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date: 9. 1.1996 10:22:31

Search (5 results, page 1 of 1)

Authors

Languages

Types

Themes