CRANV2
Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2
Methods for presentation of 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.
Coordination
Level
1
2
3
4
5
6,
7
8
9
i0
I0O
9o
8O
7O
50 ,
.J
_I I
U 50
hl
[OCRerr] 4o
'i
30 [OCRerr]
\
o IO
-61 -
Recall
Ratio
95. 0?'o
80. 7%
59.5%
38.17'.
19.79o
9. 7%
4. 7%
1.4%
o. 5?'°
o. 17'o
P i
20 30 40 50 50
°lo PRECISION
70 80 90
Precision
Ratio
o. 9%
2.2%
4.17'o
7.6%
11.67'o
zg. o90
25. 5?'0
33.8%
61.5%
100. 0%
FIGURE 3.24 TP .
TABLE AND PLOT FOR RESULTS OF 221 QUESTIONS
TOTALLED BY METHOD 1A, COORDINATION LEVELS,
FOR iNDEX LANGUAGE I. 1. a. (INDEX LANGUAGE I. 6. a
DOTTED LINE)