CRANV2
Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2
Supplementary tests and 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.
- 227 -
QUES-
TION
NUMBER
2
34
40
49
67
81
82
87
95
113
122
131
132
142
145
157
160
165
170
171
177
181
189
205
211
219
261
285
292
293
294
299
315
338
Totals
.--C'OOR DINhTLqN bZVZ LS .........
R 1 P 'R 2p ] R 3P [-R 4 P i
6.7 3.3 37.5i 7.6[OCRerr]12.5 12.0{ 8.3 100
00 0.8 75.0 6 4 25.0120.0.
8.91 1.4 11.1 o.7: - ! , -
ooI 0.2 100 i 0.5 - *
O0 ] 1.6 100 113.966.7140.0
i00
i0o
I00
100
I00
!100
100
100
50.0
100
100
100
100
100
il00 ,
1100!
I100
11oo
I100
{I0O
I00
i0o
lO0
93.:
77.;
100
92.;
75.q
100
75.t
3319.5
1.7
1.4
2.0
0.3
1.4
1.4
0.6
1.3
0.4
1.9
1.1
2.2
0.7
0.5
0.3
0.6
1.5
0.2
0.6
0.4
0.8
2.5
0.5
1.3
1.3
1.4
10.7
0.8
1.6
0.8
2733.2 1946.4 1092.9"
49.5 151.7 279.3
5l
R P
4.11I. o{
60.0{ 2.4 30.0 4.1
:93.3! 2.4 86.7 3.7 73.3
100 ! 4.2 92.9 8.0 85.7
100o.71100 1.1 lOO
100 i 2.6170.0 4.2 50
i I
{
88.21 3.0147.1 5.4 23.5
100 I 1.5[OCRerr]60.0t 3.6 20
90.91 3.1!54.5t 7.9 27.3
0.8125.01 1.4T25.0
50.0' {
[OCRerr]00 3.8'[OCRerr]91.71 6.4 83.3
i I. !
100 2.7i92,3 6.6 {61.5
71.41 8.3{57.1 16.7i
100 i 1.4180.0 6 3 {60.0 1.6.7'40.0
75.01 1.2i75.0 3.6 150.0 11.825.0
50.0i 0.5'50.0 1.4!50.01 6.350.0
i
! 4.4i66.7 11.8 -
100 ! 2.1!I00
88.9f 7.1177.8 11.3[OCRerr]55.6141.7 -
100 1.0150.0 3.81 I
- *i - *{ -[OCRerr]! *:
100 x3667 28{333120.0
{ l
10041 833 11.1116.7{20.0{
8181 7.6t72.7 17 olz7 3/23.1
100 ' 2.31100 5.8 100 '22.2100
87.5i 3.2 62.5 4.8150.0!16,0'18.8
33.3! 3 6 22.2 20.0 ll.lllO0 ll.l
i9o]O
60.0i 2. 40. 10.0
76. 9140.
41.7 3.2 78.3 11.1
85.7 2.4 4 11.8 14.3,11.8
75.0 3.2{75: 13.0 -{ *
522.2
561,7 760.1
7.8 40.0 15.0
26.764.3 60
8.025 33.3
38.5
13.8 5.9 I00
ii.i
27.3 9.1 I00
5.3
12.575.0 14.3
9.353.8 21.9
50.01
25.0i
33.[OCRerr]
10
!7.[OCRerr]
.00
6
R
20. £ 42.
42.9 66.
5.9 10(
33.3 13.
38.5 62.
-
i00 IO0
P R 7 p
7.1 100
33.: 33.3
.OO
240.6 115.4
385.4 233.3
FIGURE 6.6T,
PERFORMANCE RESULTS FOR 35 SEVEN-STARTING-TERM
QUESTIONS WITH INDEX LANGUAGE I. 1 .a CALCULATED
BY THE AVERAGE OF RATIOS.