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.
13(1 -
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ha ust tvit y I
h[OCRerr].ust ivit y 2
haustivity 3
FIGURE 4.424P THREE LEV]:LS OF EXHAUSTIVITY W]TII INDEX
LANGUAGE [.6.a, 35 QUESTIONS, 1400
DOCUMENTS. (FIGURES 4.413T, 4,412T and
4.114T)
[OCRerr] ! ' i : i
! :
o 5 io 15 2o 25 ao 55 4o 45 50 5: [OCRerr]o o5 7o 75 oo 85 90 9S IOO
t'
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'[OCRerr] X 4.415T Exhau[OCRerr]ttvity 1
! I
I O 4. ll4TExhaustivity 2
I -[OCRerr] 4,203T Exhaustivity 3
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FIGURE 4.425P THREE LEVELS OF EXHAUSTIVIT¥ WITH INDEX
LANGUAGE 1,6.a, 42 QUESTIONS, 900
DOCUMENTS. (FIGURES 4,415T, 4,414T al
4,203T)
o s Ib 15 20 25 [OCRerr]O 35 40 45 50 55 [OCRerr]O [OCRerr]5 70 75 aO e5 *O [OCRerr]5 IOO
"/, PlAECISION