ISR10
Scientific Report No. ISR-10 Information Storage and Retrieval
Search Request Formulation
chapter
Joseph John Rocchio
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
5-44
f 0rigi[OCRerr]a1 Nodified Queries*
______________ Query I [OCRerr]=1 iN=5 [OCRerr]--5
[OCRerr] `\
[OCRerr] 1 1 1 1
a
[OCRerr] I 6 5 2 2
.k 8 5 5 5
o.: s
f* [OCRerr] 7 5 4
[OCRerr] 10 f 15 6 6
e. 15 15 12 [OCRerr]
I I
ev: 15 8 16 10
18 22 iS 15
a 22 2[OCRerr] 22 16
[OCRerr] 24 52 25 17
D0 26 55 24 20
C 27 54 27 21
U [OCRerr] [OCRerr] I
59
m 52 )Q [OCRerr]o 26
e 55 52 I 44
59 60 50 46
sI 69 69 66
51
111 87 105 jI 96
I I
251 98 122 I 157
275 540 269 248
+, [OCRerr] ____ I
I I
Average Corr.
of All (19) I 247 222 l .260 .265
I [OCRerr]elevant
Docuine[OCRerr]ts I
Average Corr. I
I I
of 1st 19 .515 [OCRerr] 255 .288 .267
Nonrelevant I 14
Documents \\ l
Difference - .068 - .055 J__- .028 [OCRerr]
I ____________________ [OCRerr] ________________ I - .004
*(N relevant andN.nonrelevant documents used for relevance feedback)
[OCRerr]etrieval Performance as a Punction of Amount
of Feedback for Query[OCRerr]'1N9 Natlang11
Figure 5.15