CRANV2
Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2
Main test results
chapter
Cyril Cleverdon
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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90
70
60
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30
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FIGURE 4.840P
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40 50 60 70
°/o PRECISION
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INDEX LANGUAGE III.l.a. SEARCH A (BROKEN
LINE) AND SEARCH E, 200 DOCUMENTS (FIGURES
4.800T and 4.810T)
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FIGURE 4. 841P
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40 SO 60 70
°/o PRECISION
80 90 IO0
INDEX LANGUAGE III.2.a. SEARCH A (BROKEN LINE)
AND SEARCH E. 200 DOCUMENTS (FIGURES
4.801T and 4.811T)