IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Evaluation Parameters
chapter
E. M. Keen
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
11-19
Normed. Normed.
Recall Precision
Initial Search .8772 .6815
0
o First rterotlon .8680 .7622
1.0
0.8
0.6
0.4
0.2
0
(0
0-
I I I I I
0 0.2 Q4 0.6 0.8 1.0
Recoil
Cran-l, Thesaurus-3, Averages over [OCRerr]2 Requests
Results o[OCRerr] Two Searches in a Relevance Feedback
Evaluation Run, C[OCRerr]paring Merit Assigned by the
No[OCRerr]alized Measures with the Precision Recall Curve
Fig. 10.