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.
Request Ranks of Relevant
A
B
-- C
2,5,6
3,14
23
recision Precision
1.0 1.0 -
½
0.8 -
0.6 - 0.6 -
Third Extrapolation Method, 1.0
[OCRerr] precision at 0.0 recall.
[OCRerr] Fifth Extrapolation Method, using
o precision of first relevant.
0
¼
0.2
A
>II[OCRerr]
I I
0 0.2 0.4 0.6 0.8 1.0
a) Three Individual Requests using
1.0 precision at 0.0 recall
Recoil
0.4 -
0.2 -
I [OCRerr] Recall
0 0.2 0.4 0.6 0.8 1.0
b) Comparison of Two Extrapolation Methoc
using Averaged Results
Cran-l, Abstracts, Stem, "[OCRerr]uasi-Cranfield'
Extrapolation Method
Cut-off, Macro Evaluation of 42 Request[OCRerr]
Comparisons of Extrapolation Methods Three and Five
Fig. 23