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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10E
8O
½
% 7(
R
E
C
A 6c
L
L
0.001
O. O1
0.1
% FALLOUT
1.0 10 100
FIGURE 4.607P
HECALL-FALLOUT PLOT SHOWING EFFECT OF CHANGES IN I[OCRerr]ELEVANCE ON -I2
QUESTIONS WITH 1400 DOCUMENT COLLECTION, INDEX LANGUAGE 1.6.a.