IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
An Analysis of the Documentation Requests
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.
X-25
INPUT AND DICTIONARY EVALUATION 11A" REQUESTS `1B" REQUESTS
MEASURE
Text, Stem Normed. Recall .8028 .7516
Normed. Precision .[OCRerr]917 .5209
Text, Thesaurus-i Normed. Recall .8124 .8294
Normede Precision .6o4i .6519
Abstract, Stem Normed. Recall e7830 .7358
Normed. Precision .5403 .5244
Abstract, Thesaurus-i Normed. Recall .80oo .8033
Normed. Precision .5826 .6327
Normed.
Recall
Normed.
Precision
F. 8250
80oo
/.7750
L;50500
65oo
.6250
.6ooo
.5750
.5500
.5250
B
½4
BX
B
A
A
B
Text
- - - Abstract
S[OCRerr]M THE
SAURUS
Comparison of' "A'1 and 11B't Requests for Two Dictionaries
and Two Document Lengths.
Figure 14.