ISR11
Scientific Report No. ISR-11 Information Storage and Retrieval
Design Criteria for Automatic Information Systems
chapter
M. E. Lesk
G. Salton
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
Harris 3 Thesaurus
x
Null Concon
PRECISION PRECISION
.0
0.8
0.6
0.4
0
[OCRerr]O[OCRerr]O
[OCRerr]0[OCRerr]0
x'x~
[OCRerr]X[OCRerr]X
1.0
0.8
0.6
0.4
0.2 0.2
0
Full Text Thesaurus
[OCRerr]Null Concon (K=0.60)
x
0
[OCRerr]x[OCRerr]0
[OCRerr]
X[OCRerr]X[OCRerr]O
XO
I a a a RECALL a a a a RECALL
0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1.0
a) IRE-2 b) ADI
(`17 requests) (35 requests)
Comparison of Thesaurus Performance with Statistical Word-Word
Associations (Null Concon) l\)
Fig. 12