CRANV1P1
ASLIB Cranfield Research Project: Factors Determining the Performance of Indexing Systems: VOLUME 1. Design, Part 1. Text
Additional Tests
chapter
Cyril Cleverdon
Jack Mills
Michael Keen
Cranfield
An investigation supported by a grant to Aslib by the National Science Foundation.
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
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FIGURE 7.4 BIBLIOGRAPHIC COUPLING CARD
RELEVANT DOCUMENTS
COUPLING 1067 1164 1639 1715
STRENGTH R N -R R N -R R N -l[OCRerr] R N-R
6+
5+
4+
3+
2+
1+
1716 1717
R N-R R N-R
1 0 0 1 1 0
1 1 0 2 1 0 1 0 1 0
4 2 1 6 2 3 1 5 2 2
4 32 i 49 2 63 I 47 2 33
SCORE
RECALL
RELEVANT NON-RELEVANT RATIO
0 3
0 18
PREC~ION
RATIO
6+
5+
4+ 2 1 33% 66%
3+ 4 3 66% 57%
2+ 5 19 83% 21%
i+ 5 201 83% 2%
FIGURE 7.5
SCORE SHEET FOR BIBLIOGRAPHIC COUPLING
FOR QUESTION 34.
FIGURE 7.6 RECALCULATED BIBLIOGRAPHIC COUPLING CARD
Figures in brackets represent number of referenceu
in documents. Figures in first column give the
calculated weighdng.